<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="https://cof.arc.nasa.gov/ARMS" xmlns="http://www.w3.org/2001/XMLSchema"
	xmlns:tns="tns" xmlns:arms="https://cof.arc.nasa.gov/ARMS">


	<element name="AbResource" type="arms:AbResourceType"/>

	<complexType name="AbResourceType">
		<annotation>
			<documentation/>
		</annotation>
		<sequence>
			<element name="ResourceName" type="string" minOccurs="1" maxOccurs="1">
				<annotation>
					<documentation>Common name by which this resource is identified.</documentation>
				</annotation>
			</element>
			<element name="ResourceDescription" type="string" minOccurs="1" maxOccurs="1">
				<annotation>
					<documentation>Description of the resource, e.g., what is the data and how it was developed.</documentation>
				</annotation>
			</element>
			<element name="ResourceType" type="arms:ResourceType" minOccurs="1" maxOccurs="1">
				<annotation>
					<documentation>Type of astrobiological resource described by this metadata. An astrobiological resource is a physical or virtual entity associated with an astrobiological research investigation.</documentation>
				</annotation>
			</element>
			<element name="ResourceLocator" type="arms:ResourceLocatorType" minOccurs="1"
				maxOccurs="1">
				<annotation>
					<documentation>Description of how to locate this resource online or in a physical location.</documentation>
				</annotation>
			</element>
			<element name="ResourceLogo" type="arms:ResourceLogoType" minOccurs="0" maxOccurs="1">
				<annotation>
					<documentation>Representative image of the dataset to be used as thumbnail.</documentation>
				</annotation>
			</element>
			<element name="TeamMember" type="arms:TeamMemberType" minOccurs="1"
				maxOccurs="unbounded">
				<annotation>
					<documentation>Team members associated with creating or maintaining this resource. Each member has an optional role (lead investigator and/or point of contact) and one or more institutional affiliations.</documentation>
				</annotation>
			</element>
			<element name="Data" type="arms:DataType"
				minOccurs="0" maxOccurs="unbounded">
				<annotation>
					<documentation>Files associated with this dataset, including the data itself and key reference materials that describe or use this resource.</documentation>
				</annotation>
			</element>
			<element name="InitialReleaseDate" type="date" minOccurs="0" maxOccurs="1">
				<annotation>
					<documentation>Date this resource was initially made available.</documentation>
				</annotation>
			</element>
			<element name="LastRevisionDate" type="date" minOccurs="0" maxOccurs="1">
				<annotation>
					<documentation>Date this resource was last revised.</documentation>
				</annotation>
			</element>
			<element name="FundingSource" minOccurs="1" maxOccurs="unbounded"
				type="arms:FundingSourceType">
				<annotation>
					<documentation>
    					Source(s) that provided funds for development of
    					this resource.
    				</documentation>
				</annotation>
			</element>
			<element name="MissionOrProject" minOccurs="1" maxOccurs="unbounded"
				type="arms:MissionOrProjectType">
				<annotation>
					<documentation>
    					Mission(s) or project(s) associated with the
    					development of this resource.
    				</documentation>
				</annotation>
			</element>
			<element name="FieldCollectionLocation" type="arms:FieldCollectionLocationType" minOccurs="0" maxOccurs="unbounded">
				<annotation>
					<documentation>If this resource is a database, and if the data was collected in the field, the location(s) of the primary field site.</documentation>
				</annotation>
			</element>
			<element name="ResearchTheme" minOccurs="1" maxOccurs="unbounded">
				<annotation>
					<documentation>
    					Overall topic of the research that gave rise to
    					this resource, as defined by the NASA
    					Astrobiology Program Roadmap.
    				</documentation>
				</annotation>
				<simpleType>
					<restriction base="string">
						<enumeration value="NASA Astrobiology Program Research Topic"/>
						<enumeration value="Abiotic building blocks of life"/>
						<enumeration value="Origins of life"/>
						<enumeration value="Early life and increasing complexity"/>
						<enumeration value="Coevolution of life and the physical environment"/>
						<enumeration
							value="Characterizing environments for habitability and biosignatures"/>
						<enumeration value="Constructing habitable worlds"/>
					</restriction>
				</simpleType>
			</element>
			<element name="Keyword" type="arms:KeywordType" minOccurs="1" maxOccurs="unbounded">
				<annotation>
					<documentation>Set of keywords characterizing the research that produced this resource.</documentation>
				</annotation>
			</element>
			<element name="Discipline" minOccurs="1" maxOccurs="unbounded"
				type="arms:DisciplineType">
				<annotation>
					<documentation>
    					Set of astrobiology disciplines most relevant to
    					the research that produced this resource.
    				</documentation>
				</annotation>
			</element>
		</sequence>
	</complexType>

	<simpleType name="ResourceType">
		<restriction base="string">
			<enumeration value="Collection"/>
			<enumeration value="Dataset"/>
			<enumeration value="Event"/>
			<enumeration value="Image"/>
			<enumeration value="PhysicalSample"/>
			<enumeration value="Service"/>
			<enumeration value="Software"/>
			<enumeration value="Text"/>
			<enumeration value="Video"/>
			<enumeration value="Website"/>
		</restriction>
	</simpleType>

	<complexType name="ResourceLocatorType">
		<choice>
			<element name="URL" type="anyURI" minOccurs="1" maxOccurs="1"/>
			<element name="PostalAddress" type="string" minOccurs="1" maxOccurs="1"/>
			<element name="GeographicCoordinates" minOccurs="1" maxOccurs="1">
				<simpleType>
					<restriction base="string">
						<pattern value="[\+-]\d+(\.\d+)?[\+-]?\d+(\.\d+)?([\+-]\d+(\.\d+)?CRS.?)?/">
						</pattern>
					</restriction>
				</simpleType>
			</element>
		</choice>
	</complexType>

	<complexType name="ResourceLogoType">
		<sequence>
				<element name="ImageURL" type="anyURI" minOccurs="1" maxOccurs="1">
				<annotation>
					<documentation>URL of the image representing the dataset.</documentation>
				</annotation>
			</element>
			<element name="ImageCredit" type="string" minOccurs="0" maxOccurs="1">
				<annotation>
					<documentation>Photographer, illustrator, or copyright holder for the image.</documentation>
				</annotation>
			</element>
		</sequence>
	</complexType>

	<complexType name="PersonType">
		<sequence>
			<element name="GivenName" type="string" minOccurs="1" maxOccurs="1"> </element>
			<element name="Surname" type="string" minOccurs="1" maxOccurs="1"> </element>
			<element name="Email" minOccurs="1" maxOccurs="1">
				<simpleType>
					<restriction base="string">
						<pattern value="[^@]+@[^@]+"/>
					</restriction>
				</simpleType>
			</element>
			<element name="Address" type="string" minOccurs="0" maxOccurs="unbounded"/>
			<element name="ORCID" minOccurs="0" maxOccurs="1">
				<simpleType>
					<restriction base="string">
						<pattern value="https://orcid.org/[^\|]+"/>
					</restriction>
				</simpleType>
			</element>
		</sequence>
	</complexType>

	<complexType name="InstitutionType">
		<sequence>
			<element name="Name" type="string" minOccurs="1" maxOccurs="1"/>
			<element name="ParentInstitution" type="arms:InstitutionType" minOccurs="0"/>
			<element name="Address" type="string" minOccurs="0"/>
		</sequence>
	</complexType>

	<complexType name="DataType">
		<sequence>
			<choice>
				<sequence>
					<element name="Title" type="string" minOccurs="0" maxOccurs="1"/>
					<choice>
					<element name="DOI" minOccurs="1" maxOccurs="1">
						<simpleType>
							<restriction base="string">
								<pattern value="https://www.doi.org/\S+"> </pattern>
							</restriction>
						</simpleType>
					</element>
					<element name="URL" type="anyURI" minOccurs="1"/>
					</choice>
				</sequence>
				<sequence>
					<element name="AuthorSurname" type="string" minOccurs="1" maxOccurs="1"/> 
					<element name="AuthorGivenName" type="string" minOccurs="1" maxOccurs="1"/> 
					<element name="Title" type="string" minOccurs="1" maxOccurs="1"/>
					<element name="JournalOrConference" type="string" minOccurs="1" maxOccurs="1"/>
					<element name="PubYear" type="gYear" minOccurs="0" maxOccurs="1"/>
					<element name="PubMonth" type="gMonth" minOccurs="0" maxOccurs="1"/>
					<element name="Volume" type="string" minOccurs="0" maxOccurs="1"/> 
					<element name="URL" type="anyURI" minOccurs="0" maxOccurs="1"/> 
				</sequence>
			</choice>
			<element name="MaterialType" maxOccurs="1" minOccurs="0">
				<simpleType>
					<restriction base="string">
						<enumeration value="Documentation"/>
						<enumeration value="Publication"/>
						<enumeration value="Poster"/>
						<enumeration value="Presentation Slides"/>
						<enumeration value="Code"/>
						<enumeration value="Project Site"/>
						<enumeration value="Other"/>
					</restriction>
				</simpleType>
			</element>
		</sequence>
	</complexType>

	<complexType name="TeamMemberType">
		<complexContent>
			<extension base="arms:PersonType">
				<sequence>
					<element name="Role" maxOccurs="unbounded" minOccurs="0">
						<simpleType>
							<restriction base="string">
								<enumeration value="Lead Investigator"> </enumeration>
								<enumeration value="Point of Contact"/>
							</restriction>
						</simpleType>
					</element>
					<element name="Affiliation" type="arms:InstitutionType" maxOccurs="unbounded"
						minOccurs="0"/>
				</sequence>
			</extension>
		</complexContent>
	</complexType>


	<complexType name="KeywordType">
		<choice>
			<element name="ControlledKeyword" maxOccurs="unbounded" minOccurs="1">
				<simpleType>
					<restriction base="string">
					  <enumeration value="astronomical : asteroids : C-type"></enumeration>
					  <enumeration value="astronomical : asteroids : M-type"></enumeration>
					  <enumeration value="astronomical : asteroids : S-type"></enumeration>
					  <enumeration value="astronomical : asteroids : asteroid belt"></enumeration>
					  <enumeration value="astronomical : asteroids : centaurs"></enumeration>
					  <enumeration value="astronomical : asteroids : near-Earth objects (NEOs)"></enumeration>
					  <enumeration value="astronomical : asteroids : asteroids (general)"></enumeration>
					  <enumeration value="astronomical : comets : 67-P"></enumeration>
					  <enumeration value="astronomical : comets : 81P/Wild (Wild 2)"></enumeration>
					  <enumeration value="astronomical : comets : Hale-Bopp"></enumeration>
					  <enumeration value="astronomical : comets : Halley"></enumeration>
					  <enumeration value="astronomical : comets : Oort cloud"></enumeration>
					  <enumeration value="astronomical : comets : comets (general)"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : Beta Pictoris"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : Earth-like planet"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : Eta-Earth"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : HD 189733b"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : Harps search"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : Trappist-1 system"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : atmospheres"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : detection"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : disk-averaged spectra"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : exomoon"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : formation"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : free-floating planets"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : giant exoplanets"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : habitable planets"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : habitable zone"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : haze"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : life detection"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : magnetic fields"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : planetary evolution"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : radiative transfer"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : rocky terrestrial exoplanets"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : super-Earths"></enumeration>
					  <enumeration value="astronomical : exoplanets and exosatellites : exoplanets and exosatellites (general)"></enumeration>
					  <enumeration value="astronomical : galaxies : Milky Way"></enumeration>
					  <enumeration value="astronomical : galaxies : galaxies (general)"></enumeration>
					  <enumeration value="astronomical : interstellar medium (ISM) : dark matter"></enumeration>
					  <enumeration value="astronomical : interstellar medium (ISM) : dust grains"></enumeration>
					  <enumeration value="astronomical : interstellar medium (ISM) : intergalactic medium"></enumeration>
					  <enumeration value="astronomical : interstellar medium (ISM) : interstellar clouds"></enumeration>
					  <enumeration value="astronomical : interstellar medium (ISM) : interstellar dust"></enumeration>
					  <enumeration value="astronomical : interstellar medium (ISM) : interstellar ice"></enumeration>
					  <enumeration value="astronomical : interstellar medium (ISM) : interstellar molecules"></enumeration>
					  <enumeration value="astronomical : interstellar medium (ISM) : molecular clouds"></enumeration>
					  <enumeration value="astronomical : interstellar medium (ISM) : polycyclic aromatic hydrocarbons (PAH)"></enumeration>
					  <enumeration value="astronomical : interstellar medium (ISM) : protoplanetary disks"></enumeration>
					  <enumeration value="astronomical : interstellar medium (ISM) : solar nebula"></enumeration>
					  <enumeration value="astronomical : interstellar medium (ISM) : interstellar medium (ISM) (general)"></enumeration>
					  <enumeration value="astronomical : planetary phenomena : apogee"></enumeration>
					  <enumeration value="astronomical : planetary phenomena : circumbinary planet"></enumeration>
					  <enumeration value="astronomical : planetary phenomena : late heavy bombardment"></enumeration>
					  <enumeration value="astronomical : planetary phenomena : magnetic fields"></enumeration>
					  <enumeration value="astronomical : planetary phenomena : microgravity"></enumeration>
					  <enumeration value="astronomical : planetary phenomena : perigee"></enumeration>
					  <enumeration value="astronomical : planetary phenomena : super-Earths"></enumeration>
					  <enumeration value="astronomical : planetary phenomena : planetary phenomena (general)"></enumeration>
					  <enumeration value="astronomical : planetary systems : Gliese-876"></enumeration>
					  <enumeration value="astronomical : planetary systems : Kepler-90"></enumeration>
					  <enumeration value="astronomical : planetary systems : planetary systems (general)"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Drake Equation"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Earth : Paleoarchean"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Earth : continental crust"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Earth : early Earth"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Earth : hominids"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Earth : low Earth orbit"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Earth : snowball Earth"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Earth : technosignatures"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Earth : Earth (general)"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Earth-like planet"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Enceladus : plume"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Enceladus : Enceladus (general)"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Europa : plume"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Europa : Europa (general)"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Galilean satellites"></enumeration>
					  <enumeration value="astronomical : planets and satellites : HD 189733b"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Jupiter"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Mercury"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Moon : Aitken basin"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Moon : highlands"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Moon : lunar dust simulant"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Moon : mare"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Moon : regolith"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Moon : Moon (general)"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Pluto"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Saturn"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Titan"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Titan atmosphere"></enumeration>
					  <enumeration value="astronomical : planets and satellites : Venus"></enumeration>
					  <enumeration value="astronomical : planets and satellites : early Mars"></enumeration>
					  <enumeration value="astronomical : planets and satellites : giant planet"></enumeration>
					  <enumeration value="astronomical : planets and satellites : habitable planets"></enumeration>
					  <enumeration value="astronomical : planets and satellites : icy moon"></enumeration>
					  <enumeration value="astronomical : planets and satellites : magnetic fields"></enumeration>
					  <enumeration value="astronomical : planets and satellites : microgravity"></enumeration>
					  <enumeration value="astronomical : planets and satellites : planet and satellites: detection"></enumeration>
					  <enumeration value="astronomical : planets and satellites : planet and satellites: formation"></enumeration>
					  <enumeration value="astronomical : planets and satellites : planet core"></enumeration>
					  <enumeration value="astronomical : planets and satellites : planetary environments"></enumeration>
					  <enumeration value="astronomical : planets and satellites : planetary evolution"></enumeration>
					  <enumeration value="astronomical : planets and satellites : rocky planets"></enumeration>
					  <enumeration value="astronomical : planets and satellites : satellites"></enumeration>
					  <enumeration value="astronomical : planets and satellites : super-Earths"></enumeration>
					  <enumeration value="astronomical : planets and satellites : terraforming"></enumeration>
					  <enumeration value="astronomical : planets and satellites : terrestrial planet"></enumeration>
					  <enumeration value="astronomical : planets and satellites : planets and satellites (general)"></enumeration>
					  <enumeration value="astronomical : process - interstellar : astrochemical evolution"></enumeration>
					  <enumeration value="astronomical : process - interstellar : dust grains"></enumeration>
					  <enumeration value="astronomical : process - interstellar : molecular cloud formation"></enumeration>
					  <enumeration value="astronomical : process - interstellar : polycyclic aromatic hydrocarbons (PAH)"></enumeration>
					  <enumeration value="astronomical : process - interstellar : protostar formation"></enumeration>
					  <enumeration value="astronomical : process - interstellar : radiative transfer"></enumeration>
					  <enumeration value="astronomical : process - interstellar : process - interstellar (general)"></enumeration>
					  <enumeration value="astronomical : process - physical : irradiation"></enumeration>
					  <enumeration value="astronomical : process - physical : nuclear reactions"></enumeration>
					  <enumeration value="astronomical : process - physical : polarization : circular polarization"></enumeration>
					  <enumeration value="astronomical : process - physical : polarization : linear polarization"></enumeration>
					  <enumeration value="astronomical : process - physical : polarization : optical activity"></enumeration>
					  <enumeration value="astronomical : process - physical : polarization : polarization (general)"></enumeration>
					  <enumeration value="astronomical : process - physical : radiation : _Deinococcus radiodurans_"></enumeration>
					  <enumeration value="astronomical : process - physical : radiation : albedo"></enumeration>
					  <enumeration value="astronomical : process - physical : radiation : cosmic ray"></enumeration>
					  <enumeration value="astronomical : process - physical : radiation : disk-averaged spectra"></enumeration>
					  <enumeration value="astronomical : process - physical : radiation : energetic particles"></enumeration>
					  <enumeration value="astronomical : process - physical : radiation : energy"></enumeration>
					  <enumeration value="astronomical : process - physical : radiation : gamma ray bursts"></enumeration>
					  <enumeration value="astronomical : process - physical : radiation : infrared"></enumeration>
					  <enumeration value="astronomical : process - physical : radiation : ionizing radiation"></enumeration>
					  <enumeration value="astronomical : process - physical : radiation : maser radiation"></enumeration>
					  <enumeration value="astronomical : process - physical : radiation : radiation resistance"></enumeration>
					  <enumeration value="astronomical : process - physical : radiation : radiolysis"></enumeration>
					  <enumeration value="astronomical : process - physical : radiation : solar flux"></enumeration>
					  <enumeration value="astronomical : process - physical : radiation : space radiation"></enumeration>
					  <enumeration value="astronomical : process - physical : radiation : ultraviolet (UV)"></enumeration>
					  <enumeration value="astronomical : process - physical : radiation : radiation (general)"></enumeration>
					  <enumeration value="astronomical : process - physical : process - physical (general)"></enumeration>
					  <enumeration value="astronomical : stars : Alpha Centauri"></enumeration>
					  <enumeration value="astronomical : stars : G-type stars"></enumeration>
					  <enumeration value="astronomical : stars : K-type stars"></enumeration>
					  <enumeration value="astronomical : stars : M dwarf stars"></enumeration>
					  <enumeration value="astronomical : stars : Milky Way"></enumeration>
					  <enumeration value="astronomical : stars : active stars"></enumeration>
					  <enumeration value="astronomical : stars : binary systems"></enumeration>
					  <enumeration value="astronomical : stars : brown dwarfs"></enumeration>
					  <enumeration value="astronomical : stars : globular cluster"></enumeration>
					  <enumeration value="astronomical : stars : late-type stars"></enumeration>
					  <enumeration value="astronomical : stars : low-mass stars"></enumeration>
					  <enumeration value="astronomical : stars : main sequence stars"></enumeration>
					  <enumeration value="astronomical : stars : radiative transfer"></enumeration>
					  <enumeration value="astronomical : stars : solar photochemistry"></enumeration>
					  <enumeration value="astronomical : stars : stellar"></enumeration>
					  <enumeration value="astronomical : stars : supernovae"></enumeration>
					  <enumeration value="astronomical : stars : young stellar objects"></enumeration>
					  <enumeration value="astronomical : stars : stars (general)"></enumeration>
					  <enumeration value="biological : Archaea : Crenarchaeota"></enumeration>
					  <enumeration value="biological : Archaea : Euryarchaeota"></enumeration>
					  <enumeration value="biological : Archaea : Haloarchaea sp."></enumeration>
					  <enumeration value="biological : Archaea : Lokiarchaeota"></enumeration>
					  <enumeration value="biological : Archaea : Pyrococccus sp."></enumeration>
					  <enumeration value="biological : Archaea : Pyrodictum sp."></enumeration>
					  <enumeration value="biological : Archaea : Sulfolobus sp."></enumeration>
					  <enumeration value="biological : Archaea : Thaumarchaeota"></enumeration>
					  <enumeration value="biological : Archaea : Verstraetearchaeota"></enumeration>
					  <enumeration value="biological : Archaea : dessication resistant"></enumeration>
					  <enumeration value="biological : Archaea : diazotroph"></enumeration>
					  <enumeration value="biological : Archaea : methanogens"></enumeration>
					  <enumeration value="biological : Archaea : Archaea (general)"></enumeration>
					  <enumeration value="biological : Bacteria : _Bacillus_ sp."></enumeration>
					  <enumeration value="biological : Bacteria : _Bacillus_ spores"></enumeration>
					  <enumeration value="biological : Bacteria : _Deinococcus radiodurans_"></enumeration>
					  <enumeration value="biological : Bacteria : _Escherichia coli_"></enumeration>
					  <enumeration value="biological : Bacteria : _Salinibacter_ sp."></enumeration>
					  <enumeration value="biological : Bacteria : Acidobacteria"></enumeration>
					  <enumeration value="biological : Bacteria : Aquificales"></enumeration>
					  <enumeration value="biological : Bacteria : Bacteroidetes"></enumeration>
					  <enumeration value="biological : Bacteria : Chlorobi"></enumeration>
					  <enumeration value="biological : Bacteria : Chloroflexi"></enumeration>
					  <enumeration value="biological : Bacteria : Firmicutes"></enumeration>
					  <enumeration value="biological : Bacteria : Planctomycetes"></enumeration>
					  <enumeration value="biological : Bacteria : Proteobacteria"></enumeration>
					  <enumeration value="biological : Bacteria : Spirochaetes"></enumeration>
					  <enumeration value="biological : Bacteria : cyanobacteria"></enumeration>
					  <enumeration value="biological : Bacteria : dessication resistant"></enumeration>
					  <enumeration value="biological : Bacteria : diazotroph"></enumeration>
					  <enumeration value="biological : Bacteria : glycocalyx"></enumeration>
					  <enumeration value="biological : Bacteria : Bacteria (general)"></enumeration>
					  <enumeration value="biological : Eukarya : _Circinaria gyrosa_"></enumeration>
					  <enumeration value="biological : Eukarya : _Triticum aestivum_"></enumeration>
					  <enumeration value="biological : Eukarya : Animalia"></enumeration>
					  <enumeration value="biological : Eukarya : Plantae"></enumeration>
					  <enumeration value="biological : Eukarya : algae"></enumeration>
					  <enumeration value="biological : Eukarya : chloroplast"></enumeration>
					  <enumeration value="biological : Eukarya : cytoskeleton"></enumeration>
					  <enumeration value="biological : Eukarya : desert algae"></enumeration>
					  <enumeration value="biological : Eukarya : diatoms"></enumeration>
					  <enumeration value="biological : Eukarya : embryogenesis"></enumeration>
					  <enumeration value="biological : Eukarya : fungi : _Buellia frigida_"></enumeration>
					  <enumeration value="biological : Eukarya : fungi : _Saccharomyces cerevisiae_"></enumeration>
					  <enumeration value="biological : Eukarya : fungi : hypha"></enumeration>
					  <enumeration value="biological : Eukarya : fungi : mycelium"></enumeration>
					  <enumeration value="biological : Eukarya : fungi : mycorrhiza"></enumeration>
					  <enumeration value="biological : Eukarya : fungi : spores"></enumeration>
					  <enumeration value="biological : Eukarya : fungi : fungi (general)"></enumeration>
					  <enumeration value="biological : Eukarya : hominids"></enumeration>
					  <enumeration value="biological : Eukarya : lichen"></enumeration>
					  <enumeration value="biological : Eukarya : mitochondrion"></enumeration>
					  <enumeration value="biological : Eukarya : nucleus"></enumeration>
					  <enumeration value="biological : Eukarya : protists"></enumeration>
					  <enumeration value="biological : Eukarya : snow algae"></enumeration>
					  <enumeration value="biological : Eukarya : tardigrades"></enumeration>
					  <enumeration value="biological : Eukarya : yeasts"></enumeration>
					  <enumeration value="biological : Eukarya : Eukarya (general)"></enumeration>
					  <enumeration value="biological : bioenergetics : FeS clusters"></enumeration>
					  <enumeration value="biological : bioenergetics : adenosine triphosphate (ATP)"></enumeration>
					  <enumeration value="biological : bioenergetics : biological energy quantum (BEQ)"></enumeration>
					  <enumeration value="biological : bioenergetics : endergonic"></enumeration>
					  <enumeration value="biological : bioenergetics : exergonic"></enumeration>
					  <enumeration value="biological : bioenergetics : fermentation"></enumeration>
					  <enumeration value="biological : bioenergetics : phosphorylation"></enumeration>
					  <enumeration value="biological : bioenergetics : proton motive force"></enumeration>
					  <enumeration value="biological : bioenergetics : respiration"></enumeration>
					  <enumeration value="biological : bioenergetics : bioenergetics (general)"></enumeration>
					  <enumeration value="biological : biomolecules : 16s rRNA"></enumeration>
					  <enumeration value="biological : biomolecules : DNA"></enumeration>
					  <enumeration value="biological : biomolecules : RNA"></enumeration>
					  <enumeration value="biological : biomolecules : adenine"></enumeration>
					  <enumeration value="biological : biomolecules : adenosine triphosphate (ATP)"></enumeration>
					  <enumeration value="biological : biomolecules : alpha amino acid"></enumeration>
					  <enumeration value="biological : biomolecules : amino acids"></enumeration>
					  <enumeration value="biological : biomolecules : aminoacyl-tRNA synthetase"></enumeration>
					  <enumeration value="biological : biomolecules : asparagine"></enumeration>
					  <enumeration value="biological : biomolecules : bacteriochlorophyll"></enumeration>
					  <enumeration value="biological : biomolecules : beta carotene"></enumeration>
					  <enumeration value="biological : biomolecules : calcitonin"></enumeration>
					  <enumeration value="biological : biomolecules : carotenoids"></enumeration>
					  <enumeration value="biological : biomolecules : chlorophylls"></enumeration>
					  <enumeration value="biological : biomolecules : chromophore"></enumeration>
					  <enumeration value="biological : biomolecules : cytosine"></enumeration>
					  <enumeration value="biological : biomolecules : glycocalyx"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : Fischer-Tropsch"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : alkanes"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : carotenoids"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : fatty acids"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : glycerol dialkyl glycerol tetraethers (GDGTs)"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : hopanes"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : hopanoids"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : hydrocarbons"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : intact polar lipids"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : isoprenoids"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : kerogen"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : ladderanes"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : lipid biomarkers"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : lipid vesicles"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : liposomes"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : membrane evolution"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : membranes"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : phospholipid membranes"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : steranes"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : steroids"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : triterpenes"></enumeration>
					  <enumeration value="biological : biomolecules : lipids : lipids (general)"></enumeration>
					  <enumeration value="biological : biomolecules : mRNA"></enumeration>
					  <enumeration value="biological : biomolecules : nucleic acids"></enumeration>
					  <enumeration value="biological : biomolecules : oligomers"></enumeration>
					  <enumeration value="biological : biomolecules : oligonucleotides"></enumeration>
					  <enumeration value="biological : biomolecules : oligopeptides"></enumeration>
					  <enumeration value="biological : biomolecules : peptides"></enumeration>
					  <enumeration value="biological : biomolecules : photosynthetic pigments"></enumeration>
					  <enumeration value="biological : biomolecules : phycobiliprotein"></enumeration>
					  <enumeration value="biological : biomolecules : polymers"></enumeration>
					  <enumeration value="biological : biomolecules : porphyrins"></enumeration>
					  <enumeration value="biological : biomolecules : proteins"></enumeration>
					  <enumeration value="biological : biomolecules : pyrimidine"></enumeration>
					  <enumeration value="biological : biomolecules : pyruvate"></enumeration>
					  <enumeration value="biological : biomolecules : rRNA"></enumeration>
					  <enumeration value="biological : biomolecules : ribonucleotides"></enumeration>
					  <enumeration value="biological : biomolecules : ribozymes"></enumeration>
					  <enumeration value="biological : biomolecules : scytonemin"></enumeration>
					  <enumeration value="biological : biomolecules : snRNA"></enumeration>
					  <enumeration value="biological : biomolecules : tRNA"></enumeration>
					  <enumeration value="biological : biomolecules : triose"></enumeration>
					  <enumeration value="biological : biomolecules : tyrosine"></enumeration>
					  <enumeration value="biological : biomolecules : biomolecules (general)"></enumeration>
					  <enumeration value="biological : biosignatures : DNA"></enumeration>
					  <enumeration value="biological : biosignatures : biofilms"></enumeration>
					  <enumeration value="biological : biosignatures : biogenicity"></enumeration>
					  <enumeration value="biological : biosignatures : biomarker ratios"></enumeration>
					  <enumeration value="biological : biosignatures : biominerals"></enumeration>
					  <enumeration value="biological : biosignatures : biosignature preservation"></enumeration>
					  <enumeration value="biological : biosignatures : carbon isotopes"></enumeration>
					  <enumeration value="biological : biosignatures : iron isotopes"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : Fischer-Tropsch"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : alkanes"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : carotenoids"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : fatty acids"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : glycerol dialkyl glycerol tetraethers (GDGTs)"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : hopanes"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : hopanoids"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : hydrocarbons"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : intact polar lipids"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : isoprenoids"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : kerogen"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : ladderanes"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : lipid biomarkers"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : lipid vesicles"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : liposomes"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : membrane evolution"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : membranes"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : phospholipid membranes"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : steranes"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : steroids"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : triterpene"></enumeration>
					  <enumeration value="biological : biosignatures : lipids : lipids (general)"></enumeration>
					  <enumeration value="biological : biosignatures : mass independent fractionation (MIF)"></enumeration>
					  <enumeration value="biological : biosignatures : microbialites"></enumeration>
					  <enumeration value="biological : biosignatures : microfossils"></enumeration>
					  <enumeration value="biological : biosignatures : porphyrins"></enumeration>
					  <enumeration value="biological : biosignatures : spectroscopic biosignatures"></enumeration>
					  <enumeration value="biological : biosignatures : stromatolites"></enumeration>
					  <enumeration value="biological : biosignatures : sulfur isotopes"></enumeration>
					  <enumeration value="biological : biosignatures : xeropreservation"></enumeration>
					  <enumeration value="biological : biosignatures : biosignatures (general)"></enumeration>
					  <enumeration value="biological : biotic synthesis : DNA replication"></enumeration>
					  <enumeration value="biological : biotic synthesis : biogenesis"></enumeration>
					  <enumeration value="biological : biotic synthesis : biogenicity"></enumeration>
					  <enumeration value="biological : biotic synthesis : biosynthesis"></enumeration>
					  <enumeration value="biological : biotic synthesis : template-directed synthesis"></enumeration>
					  <enumeration value="biological : biotic synthesis : biotic synthesis (general)"></enumeration>
					  <enumeration value="biological : cellular structures : cell walls"></enumeration>
					  <enumeration value="biological : cellular structures : chloroplasts"></enumeration>
					  <enumeration value="biological : cellular structures : chlorosomes"></enumeration>
					  <enumeration value="biological : cellular structures : cytoplasm"></enumeration>
					  <enumeration value="biological : cellular structures : cytoskeleton"></enumeration>
					  <enumeration value="biological : cellular structures : extracellular membrane vesicles (EMVS)"></enumeration>
					  <enumeration value="biological : cellular structures : membranes"></enumeration>
					  <enumeration value="biological : cellular structures : mitochondrion"></enumeration>
					  <enumeration value="biological : cellular structures : nucleus"></enumeration>
					  <enumeration value="biological : cellular structures : phospholipid membranes"></enumeration>
					  <enumeration value="biological : cellular structures : plasmid"></enumeration>
					  <enumeration value="biological : cellular structures : ribosomes"></enumeration>
					  <enumeration value="biological : cellular structures : spores"></enumeration>
					  <enumeration value="biological : cellular structures : vesicles"></enumeration>
					  <enumeration value="biological : cellular structures : cellular structures (general)"></enumeration>
					  <enumeration value="biological : ecosystems : biosphere"></enumeration>
					  <enumeration value="biological : ecosystems : deep biosphere"></enumeration>
					  <enumeration value="biological : ecosystems : hydrothermal vents"></enumeration>
					  <enumeration value="biological : ecosystems : lakes"></enumeration>
					  <enumeration value="biological : ecosystems : microbial ecology"></enumeration>
					  <enumeration value="biological : ecosystems : microbial mats"></enumeration>
					  <enumeration value="biological : ecosystems : ocean"></enumeration>
					  <enumeration value="biological : ecosystems : seafloor"></enumeration>
					  <enumeration value="biological : ecosystems : soil"></enumeration>
					  <enumeration value="biological : ecosystems : ecosystems (general)"></enumeration>
					  <enumeration value="biological : extremophiles : _Chroococcidiopsis_"></enumeration>
					  <enumeration value="biological : extremophiles : _Circinaria gyrosa_"></enumeration>
					  <enumeration value="biological : extremophiles : _Deinococcus radiodurans_"></enumeration>
					  <enumeration value="biological : extremophiles : _Haloarchaea_ sp."></enumeration>
					  <enumeration value="biological : extremophiles : _Pyrococccus_ sp."></enumeration>
					  <enumeration value="biological : extremophiles : _Salinibacter_ sp."></enumeration>
					  <enumeration value="biological : extremophiles : acidophiles"></enumeration>
					  <enumeration value="biological : extremophiles : alkaliphile"></enumeration>
					  <enumeration value="biological : extremophiles : anhydrobiosis"></enumeration>
					  <enumeration value="biological : extremophiles : barophile"></enumeration>
					  <enumeration value="biological : extremophiles : desert algae"></enumeration>
					  <enumeration value="biological : extremophiles : desiccation resistance"></enumeration>
					  <enumeration value="biological : extremophiles : endolith"></enumeration>
					  <enumeration value="biological : extremophiles : halophiles"></enumeration>
					  <enumeration value="biological : extremophiles : psychrophile"></enumeration>
					  <enumeration value="biological : extremophiles : radiation resistance"></enumeration>
					  <enumeration value="biological : extremophiles : snow algae"></enumeration>
					  <enumeration value="biological : extremophiles : thermoacidophile"></enumeration>
					  <enumeration value="biological : extremophiles : thermophiles"></enumeration>
					  <enumeration value="biological : extremophiles : xerophile"></enumeration>
					  <enumeration value="biological : extremophiles : extremophiles (general)"></enumeration>
					  <enumeration value="biological : fossils : Apex Chert"></enumeration>
					  <enumeration value="biological : fossils : Barberton"></enumeration>
					  <enumeration value="biological : fossils : Gunflint Formation"></enumeration>
					  <enumeration value="biological : fossils : Rhynie Chert"></enumeration>
					  <enumeration value="biological : fossils : Warrawoona Group"></enumeration>
					  <enumeration value="biological : fossils : microbe-mineral interactions"></enumeration>
					  <enumeration value="biological : fossils : microbialites"></enumeration>
					  <enumeration value="biological : fossils : microfossils"></enumeration>
					  <enumeration value="biological : fossils : stromatolites"></enumeration>
					  <enumeration value="biological : fossils : thrombolites"></enumeration>
					  <enumeration value="biological : fossils : fossils (general)"></enumeration>
					  <enumeration value="biological : fungi : _Buellia frigida_"></enumeration>
					  <enumeration value="biological : fungi : _Saccharomyces cerevisiae_"></enumeration>
					  <enumeration value="biological : fungi : hypha"></enumeration>
					  <enumeration value="biological : fungi : mycelium"></enumeration>
					  <enumeration value="biological : fungi : mycorrhiza"></enumeration>
					  <enumeration value="biological : fungi : spores"></enumeration>
					  <enumeration value="biological : fungi : fungi (general)"></enumeration>
					  <enumeration value="biological : hydrothermal systems : Iceland"></enumeration>
					  <enumeration value="biological : hydrothermal systems : Kamchatka"></enumeration>
					  <enumeration value="biological : hydrothermal systems : Lost City"></enumeration>
					  <enumeration value="biological : hydrothermal systems : New Zealand"></enumeration>
					  <enumeration value="biological : hydrothermal systems : Yellowstone"></enumeration>
					  <enumeration value="biological : hydrothermal systems : hotspots"></enumeration>
					  <enumeration value="biological : hydrothermal systems : mid-ocean ridges"></enumeration>
					  <enumeration value="biological : hydrothermal systems : sinters"></enumeration>
					  <enumeration value="biological : hydrothermal systems : travertines"></enumeration>
					  <enumeration value="biological : hydrothermal systems : hydrothermal systems (general)"></enumeration>
					  <enumeration value="biological : metabolism : TCA cycle"></enumeration>
					  <enumeration value="biological : metabolism : aerobes"></enumeration>
					  <enumeration value="biological : metabolism : anabolism"></enumeration>
					  <enumeration value="biological : metabolism : anaerobes"></enumeration>
					  <enumeration value="biological : metabolism : carbon fixation"></enumeration>
					  <enumeration value="biological : metabolism : catabolism"></enumeration>
					  <enumeration value="biological : metabolism : chemolithotrophic"></enumeration>
					  <enumeration value="biological : metabolism : energy transformation"></enumeration>
					  <enumeration value="biological : metabolism : feedback loops"></enumeration>
					  <enumeration value="biological : metabolism : metabolic cycles"></enumeration>
					  <enumeration value="biological : metabolism : methane oxidation"></enumeration>
					  <enumeration value="biological : metabolism : mixotrophy"></enumeration>
					  <enumeration value="biological : metabolism : oxidation-reduction potential"></enumeration>
					  <enumeration value="biological : metabolism : proto-metabolism"></enumeration>
					  <enumeration value="biological : metabolism : proton pump"></enumeration>
					  <enumeration value="biological : metabolism : redox"></enumeration>
					  <enumeration value="biological : metabolism : metabolism (general)"></enumeration>
					  <enumeration value="biological : microorganisms : _Bacillus_ spores"></enumeration>
					  <enumeration value="biological : microorganisms : _Chroococcidiopsis_"></enumeration>
					  <enumeration value="biological : microorganisms : _Nostoc_ sp."></enumeration>
					  <enumeration value="biological : microorganisms : _Pelobacter_ sp."></enumeration>
					  <enumeration value="biological : microorganisms : acidophiles"></enumeration>
					  <enumeration value="biological : microorganisms : aerobes"></enumeration>
					  <enumeration value="biological : microorganisms : algae"></enumeration>
					  <enumeration value="biological : microorganisms : anaerobes"></enumeration>
					  <enumeration value="biological : microorganisms : barophile"></enumeration>
					  <enumeration value="biological : microorganisms : bioaerosols"></enumeration>
					  <enumeration value="biological : microorganisms : biofilms"></enumeration>
					  <enumeration value="biological : microorganisms : culture collection"></enumeration>
					  <enumeration value="biological : microorganisms : cytoplasm"></enumeration>
					  <enumeration value="biological : microorganisms : desert algae"></enumeration>
					  <enumeration value="biological : microorganisms : dessication resistant"></enumeration>
					  <enumeration value="biological : microorganisms : diatoms"></enumeration>
					  <enumeration value="biological : microorganisms : diazotroph"></enumeration>
					  <enumeration value="biological : microorganisms : halophiles"></enumeration>
					  <enumeration value="biological : microorganisms : methanogens"></enumeration>
					  <enumeration value="biological : microorganisms : microbe-mineral interactions"></enumeration>
					  <enumeration value="biological : microorganisms : microbial ecology"></enumeration>
					  <enumeration value="biological : microorganisms : microbial mats"></enumeration>
					  <enumeration value="biological : microorganisms : microeukaryote"></enumeration>
					  <enumeration value="biological : microorganisms : protists"></enumeration>
					  <enumeration value="biological : microorganisms : radiation resistance"></enumeration>
					  <enumeration value="biological : microorganisms : snow algae"></enumeration>
					  <enumeration value="biological : microorganisms : spores"></enumeration>
					  <enumeration value="biological : microorganisms : thermophiles"></enumeration>
					  <enumeration value="biological : microorganisms : yeasts"></enumeration>
					  <enumeration value="biological : microorganisms : microorganisms (general)"></enumeration>
					  <enumeration value="biological : multicellular life"></enumeration>
					  <enumeration value="biological : omics : genomics"></enumeration>
					  <enumeration value="biological : omics : lipidomics"></enumeration>
					  <enumeration value="biological : omics : metabolomics"></enumeration>
					  <enumeration value="biological : omics : metagenomics"></enumeration>
					  <enumeration value="biological : omics : proteomics"></enumeration>
					  <enumeration value="biological : omics : transcriptomics"></enumeration>
					  <enumeration value="biological : omics : omics (general)"></enumeration>
					  <enumeration value="biological : photosynthesis : anoxygenic photosynthesis : FeS clusters"></enumeration>
					  <enumeration value="biological : photosynthesis : anoxygenic photosynthesis : bacteriochlorophylls"></enumeration>
					  <enumeration value="biological : photosynthesis : anoxygenic photosynthesis : chlorosome"></enumeration>
					  <enumeration value="biological : photosynthesis : anoxygenic photosynthesis : chromophore"></enumeration>
					  <enumeration value="biological : photosynthesis : anoxygenic photosynthesis : photosynthetic pigments"></enumeration>
					  <enumeration value="biological : photosynthesis : anoxygenic photosynthesis : reaction center"></enumeration>
					  <enumeration value="biological : photosynthesis : anoxygenic photosynthesis : anoxygenic photosynthesis (general)"></enumeration>
					  <enumeration value="biological : photosynthesis : oxygenic photosynthesis : FeS clusters"></enumeration>
					  <enumeration value="biological : photosynthesis : oxygenic photosynthesis : algae"></enumeration>
					  <enumeration value="biological : photosynthesis : oxygenic photosynthesis : chlorophylls"></enumeration>
					  <enumeration value="biological : photosynthesis : oxygenic photosynthesis : chloroplast"></enumeration>
					  <enumeration value="biological : photosynthesis : oxygenic photosynthesis : chromophore"></enumeration>
					  <enumeration value="biological : photosynthesis : oxygenic photosynthesis : endosymbiosis"></enumeration>
					  <enumeration value="biological : photosynthesis : oxygenic photosynthesis : photosynthetic pigments"></enumeration>
					  <enumeration value="biological : photosynthesis : oxygenic photosynthesis : photosystem I"></enumeration>
					  <enumeration value="biological : photosynthesis : oxygenic photosynthesis : photosystem II"></enumeration>
					  <enumeration value="biological : photosynthesis : oxygenic photosynthesis : phycobiliprotein"></enumeration>
					  <enumeration value="biological : photosynthesis : oxygenic photosynthesis : reaction center"></enumeration>
					  <enumeration value="biological : photosynthesis : oxygenic photosynthesis : thylakoid membrane"></enumeration>
					  <enumeration value="biological : photosynthesis : oxygenic photosynthesis : oxygenic photosynthesis (general)"></enumeration>
					  <enumeration value="biological : phototrophs : anoxygenic phototrophs : Chloracidobacterium"></enumeration>
					  <enumeration value="biological : phototrophs : anoxygenic phototrophs : Chlorobi"></enumeration>
					  <enumeration value="biological : phototrophs : anoxygenic phototrophs : Chloroflexi"></enumeration>
					  <enumeration value="biological : phototrophs : anoxygenic phototrophs : Filamentous Anoxygenic Phototrophs (FAPs)"></enumeration>
					  <enumeration value="biological : phototrophs : anoxygenic phototrophs : Heliobacteria"></enumeration>
					  <enumeration value="biological : phototrophs : anoxygenic phototrophs : bacteriochlorophylls"></enumeration>
					  <enumeration value="biological : phototrophs : anoxygenic phototrophs : chlorosome"></enumeration>
					  <enumeration value="biological : phototrophs : anoxygenic phototrophs : green sulfur bacteria"></enumeration>
					  <enumeration value="biological : phototrophs : anoxygenic phototrophs : purple non-sulfur bacteria"></enumeration>
					  <enumeration value="biological : phototrophs : anoxygenic phototrophs : purple sulfur bacteria"></enumeration>
					  <enumeration value="biological : phototrophs : anoxygenic phototrophs : anoxygenic phototrophs (general)"></enumeration>
					  <enumeration value="biological : phototrophs : oxygenic phototrophs : _Gloeobacter violaceus_"></enumeration>
					  <enumeration value="biological : phototrophs : oxygenic phototrophs : _Nostoc_ sp."></enumeration>
					  <enumeration value="biological : phototrophs : oxygenic phototrophs : _Prochlorococcus_ sp."></enumeration>
					  <enumeration value="biological : phototrophs : oxygenic phototrophs : cyanobacteria"></enumeration>
					  <enumeration value="biological : phototrophs : oxygenic phototrophs : photosystem I"></enumeration>
					  <enumeration value="biological : phototrophs : oxygenic phototrophs : photosystem II"></enumeration>
					  <enumeration value="biological : phototrophs : oxygenic phototrophs : phycobiliprotein"></enumeration>
					  <enumeration value="biological : phototrophs : oxygenic phototrophs : thylakoid membrane"></enumeration>
					  <enumeration value="biological : phototrophs : oxygenic phototrophs : oxygenic phototrophs (general)"></enumeration>
					  <enumeration value="biological : phylogenetics : cenancestor"></enumeration>
					  <enumeration value="biological : phylogenetics : coevolution"></enumeration>
					  <enumeration value="biological : phylogenetics : genes"></enumeration>
					  <enumeration value="biological : phylogenetics : genomes"></enumeration>
					  <enumeration value="biological : phylogenetics : last universal common ancestor (LUCA)"></enumeration>
					  <enumeration value="biological : phylogenetics : phylogenetics (general)"></enumeration>
					  <enumeration value="biological : planetary protection : COSPAR policy"></enumeration>
					  <enumeration value="biological : planetary protection : back contamination"></enumeration>
					  <enumeration value="biological : planetary protection : bioburden"></enumeration>
					  <enumeration value="biological : planetary protection : clean room"></enumeration>
					  <enumeration value="biological : planetary protection : forward contamination"></enumeration>
					  <enumeration value="biological : planetary protection : organic decontamination"></enumeration>
					  <enumeration value="biological : planetary protection : special regions"></enumeration>
					  <enumeration value="biological : planetary protection : planetary protection (general)"></enumeration>
					  <enumeration value="biological : plants : _Arabidopsis thaliana_"></enumeration>
					  <enumeration value="biological : plants : _Brassica rapa_"></enumeration>
					  <enumeration value="biological : plants : _Triticum aestivum_"></enumeration>
					  <enumeration value="biological : plants : astrobotany"></enumeration>
					  <enumeration value="biological : plants : gravitropism"></enumeration>
					  <enumeration value="biological : plants : plants (general)"></enumeration>
					  <enumeration value="biological : sedimentary structures : bioturbation"></enumeration>
					  <enumeration value="biological : sedimentary structures : microbialites"></enumeration>
					  <enumeration value="biological : sedimentary structures : microbially-influenced sedimentary structures (MISS)"></enumeration>
					  <enumeration value="biological : sedimentary structures : stromatolites"></enumeration>
					  <enumeration value="biological : sedimentary structures : thrombolites"></enumeration>
					  <enumeration value="biological : sedimentary structures : trace fossils"></enumeration>
					  <enumeration value="biological : sedimentary structures : sedimentary structures (general)"></enumeration>
					  <enumeration value="biological : synthetic life : artificial cells"></enumeration>
					  <enumeration value="biological : synthetic life : artificial life"></enumeration>
					  <enumeration value="biological : synthetic life : unnatural base pair"></enumeration>
					  <enumeration value="biological : synthetic life : synthetic life (general)"></enumeration>
					  <enumeration value="biological : viruses : bacteriophage"></enumeration>
					  <enumeration value="biological : viruses : reovirus"></enumeration>
					  <enumeration value="biological : viruses : viruses (general)"></enumeration>
					  <enumeration value="biological : biological (general)"></enumeration>
					  <enumeration value="chemical : aerosols : bioaerosols"></enumeration>
					  <enumeration value="chemical : aerosols : clouds"></enumeration>
					  <enumeration value="chemical : aerosols : dust"></enumeration>
					  <enumeration value="chemical : aerosols : tholins"></enumeration>
					  <enumeration value="chemical : aerosols : aerosols (general)"></enumeration>
					  <enumeration value="chemical : catalysis : autocatalysis"></enumeration>
					  <enumeration value="chemical : catalysis : autocatalytic network"></enumeration>
					  <enumeration value="chemical : catalysis : cofactor"></enumeration>
					  <enumeration value="chemical : catalysis : enzymes : RuBisCo"></enumeration>
					  <enumeration value="chemical : catalysis : enzymes : aldolase"></enumeration>
					  <enumeration value="chemical : catalysis : enzymes : aminoacyl-tRNA synthetase"></enumeration>
					  <enumeration value="chemical : catalysis : enzymes : disulfide reductases"></enumeration>
					  <enumeration value="chemical : catalysis : enzymes : hydrogenase"></enumeration>
					  <enumeration value="chemical : catalysis : enzymes : manganese superoxide dismutase"></enumeration>
					  <enumeration value="chemical : catalysis : enzymes : methyl-coenzyme M reductase"></enumeration>
					  <enumeration value="chemical : catalysis : enzymes : nitrogenase"></enumeration>
					  <enumeration value="chemical : catalysis : enzymes : ribozymes"></enumeration>
					  <enumeration value="chemical : catalysis : enzymes : enzymes (general)"></enumeration>
					  <enumeration value="chemical : catalysis : montmorillonite catalysis"></enumeration>
					  <enumeration value="chemical : catalysis : catalysis (general)"></enumeration>
					  <enumeration value="chemical : chirality : chiral amplification"></enumeration>
					  <enumeration value="chemical : chirality : chiroselection"></enumeration>
					  <enumeration value="chemical : chirality : circular polarization"></enumeration>
					  <enumeration value="chemical : chirality : enantiomeric excess"></enumeration>
					  <enumeration value="chemical : chirality : enantiomers"></enumeration>
					  <enumeration value="chemical : chirality : enantioselective separation"></enumeration>
					  <enumeration value="chemical : chirality : enantiotopic"></enumeration>
					  <enumeration value="chemical : chirality : homochirality"></enumeration>
					  <enumeration value="chemical : chirality : polarization : circular polarization"></enumeration>
					  <enumeration value="chemical : chirality : polarization : linear polarization"></enumeration>
					  <enumeration value="chemical : chirality : polarization : optical activity"></enumeration>
					  <enumeration value="chemical : chirality : polarization : polarization (general)"></enumeration>
					  <enumeration value="chemical : chirality : racemic"></enumeration>
					  <enumeration value="chemical : chirality : chirality (general)"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : ammonia"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : ammonium cyanide"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : amorphous manganese-calcium oxides"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : borates"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : carbon dioxide"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : carbon monoxide"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : carbonates"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : chlorate"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : chlorides"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : clathrate"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : deliquescent minerals"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : hydrogen peroxide"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : iron sulfides"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : jarosite"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : magnesium sulfates"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : magnetite"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : manganese oxides"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : mineral surfaces"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : nitrates"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : nitrites"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : nitrous oxide"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : perchlorates"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : phosphates"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : phosphite"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : reactive oxygen species"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : silica"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : sulfide"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : water"></enumeration>
					  <enumeration value="chemical : compounds - inorganic : compounds - inorganic (general)"></enumeration>
					  <enumeration value="chemical : compounds - organic : acetylene"></enumeration>
					  <enumeration value="chemical : compounds - organic : adenine"></enumeration>
					  <enumeration value="chemical : compounds - organic : aldehydes"></enumeration>
					  <enumeration value="chemical : compounds - organic : alkanes"></enumeration>
					  <enumeration value="chemical : compounds - organic : alpha amino acid"></enumeration>
					  <enumeration value="chemical : compounds - organic : alpha amino isobutyric acid"></enumeration>
					  <enumeration value="chemical : compounds - organic : amino acids"></enumeration>
					  <enumeration value="chemical : compounds - organic : amphiphiles"></enumeration>
					  <enumeration value="chemical : compounds - organic : aptamer"></enumeration>
					  <enumeration value="chemical : compounds - organic : arginine"></enumeration>
					  <enumeration value="chemical : compounds - organic : aromatic amines"></enumeration>
					  <enumeration value="chemical : compounds - organic : aromatic amino acids"></enumeration>
					  <enumeration value="chemical : compounds - organic : asparagine"></enumeration>
					  <enumeration value="chemical : compounds - organic : bacteriochlorophylls"></enumeration>
					  <enumeration value="chemical : compounds - organic : beta carotene"></enumeration>
					  <enumeration value="chemical : compounds - organic : carotenoids"></enumeration>
					  <enumeration value="chemical : compounds - organic : catecholamines"></enumeration>
					  <enumeration value="chemical : compounds - organic : chlorophylls"></enumeration>
					  <enumeration value="chemical : compounds - organic : clathrate"></enumeration>
					  <enumeration value="chemical : compounds - organic : cytosine"></enumeration>
					  <enumeration value="chemical : compounds - organic : delta aminolevulinic acid"></enumeration>
					  <enumeration value="chemical : compounds - organic : diketopiperazine"></enumeration>
					  <enumeration value="chemical : compounds - organic : fatty acids"></enumeration>
					  <enumeration value="chemical : compounds - organic : formaldehyde"></enumeration>
					  <enumeration value="chemical : compounds - organic : formamide"></enumeration>
					  <enumeration value="chemical : compounds - organic : formate"></enumeration>
					  <enumeration value="chemical : compounds - organic : glycerol dialkyl glycerol tetraethers (GDGTs)"></enumeration>
					  <enumeration value="chemical : compounds - organic : glycine"></enumeration>
					  <enumeration value="chemical : compounds - organic : hydrocarbons"></enumeration>
					  <enumeration value="chemical : compounds - organic : hydrogen cyanide (HCN)"></enumeration>
					  <enumeration value="chemical : compounds - organic : intact polar lipids"></enumeration>
					  <enumeration value="chemical : compounds - organic : isoprenoids"></enumeration>
					  <enumeration value="chemical : compounds - organic : kerogen"></enumeration>
					  <enumeration value="chemical : compounds - organic : ladderane"></enumeration>
					  <enumeration value="chemical : compounds - organic : manganese superoxide dismutase"></enumeration>
					  <enumeration value="chemical : compounds - organic : methane"></enumeration>
					  <enumeration value="chemical : compounds - organic : monocarboxylic acids"></enumeration>
					  <enumeration value="chemical : compounds - organic : nucleic acids"></enumeration>
					  <enumeration value="chemical : compounds - organic : nucleobases"></enumeration>
					  <enumeration value="chemical : compounds - organic : nucleosides"></enumeration>
					  <enumeration value="chemical : compounds - organic : nucleotides"></enumeration>
					  <enumeration value="chemical : compounds - organic : oligomers"></enumeration>
					  <enumeration value="chemical : compounds - organic : oligonucleotides"></enumeration>
					  <enumeration value="chemical : compounds - organic : oligopeptides"></enumeration>
					  <enumeration value="chemical : compounds - organic : peptides"></enumeration>
					  <enumeration value="chemical : compounds - organic : polymers"></enumeration>
					  <enumeration value="chemical : compounds - organic : porphyrins"></enumeration>
					  <enumeration value="chemical : compounds - organic : proteins"></enumeration>
					  <enumeration value="chemical : compounds - organic : pyrimidine"></enumeration>
					  <enumeration value="chemical : compounds - organic : pyruvate"></enumeration>
					  <enumeration value="chemical : compounds - organic : ribonucleotides"></enumeration>
					  <enumeration value="chemical : compounds - organic : ribose"></enumeration>
					  <enumeration value="chemical : compounds - organic : scytonemin"></enumeration>
					  <enumeration value="chemical : compounds - organic : sugars"></enumeration>
					  <enumeration value="chemical : compounds - organic : tholins"></enumeration>
					  <enumeration value="chemical : compounds - organic : triose"></enumeration>
					  <enumeration value="chemical : compounds - organic : tyrosine"></enumeration>
					  <enumeration value="chemical : compounds - organic : compounds - organic (general)"></enumeration>
					  <enumeration value="chemical : elements : arsenic"></enumeration>
					  <enumeration value="chemical : elements : carbon"></enumeration>
					  <enumeration value="chemical : elements : carbon-14"></enumeration>
					  <enumeration value="chemical : elements : hydrogen"></enumeration>
					  <enumeration value="chemical : elements : iron"></enumeration>
					  <enumeration value="chemical : elements : nitrogen"></enumeration>
					  <enumeration value="chemical : elements : oxygen"></enumeration>
					  <enumeration value="chemical : elements : phosphorus"></enumeration>
					  <enumeration value="chemical : elements : potassium"></enumeration>
					  <enumeration value="chemical : elements : sodium"></enumeration>
					  <enumeration value="chemical : elements : sulfur"></enumeration>
					  <enumeration value="chemical : elements : elements (general)"></enumeration>
					  <enumeration value="chemical : enzymes : RuBisCo"></enumeration>
					  <enumeration value="chemical : enzymes : aldolase"></enumeration>
					  <enumeration value="chemical : enzymes : aminoacyl-tRNA synthetase"></enumeration>
					  <enumeration value="chemical : enzymes : disulfide reductases"></enumeration>
					  <enumeration value="chemical : enzymes : hydrogenase"></enumeration>
					  <enumeration value="chemical : enzymes : manganese superoxide dismutase"></enumeration>
					  <enumeration value="chemical : enzymes : methyl-coenzyme M reductase"></enumeration>
					  <enumeration value="chemical : enzymes : nitrogenase"></enumeration>
					  <enumeration value="chemical : enzymes : ribozymes"></enumeration>
					  <enumeration value="chemical : enzymes : enzymes (general)"></enumeration>
					  <enumeration value="chemical : isotopes : aluminum isotopes"></enumeration>
					  <enumeration value="chemical : isotopes : argon isotopes"></enumeration>
					  <enumeration value="chemical : isotopes : carbon isotopes"></enumeration>
					  <enumeration value="chemical : isotopes : carbon-14"></enumeration>
					  <enumeration value="chemical : isotopes : compound specific isotope analysis (CSIA)"></enumeration>
					  <enumeration value="chemical : isotopes : hydrogen isotopes"></enumeration>
					  <enumeration value="chemical : isotopes : iron isotopes"></enumeration>
					  <enumeration value="chemical : isotopes : mass independent fractionation (MIF)"></enumeration>
					  <enumeration value="chemical : isotopes : nitrogen isotopes"></enumeration>
					  <enumeration value="chemical : isotopes : oxygen isotopes"></enumeration>
					  <enumeration value="chemical : isotopes : phosphorus isotopes"></enumeration>
					  <enumeration value="chemical : isotopes : radiocarbon"></enumeration>
					  <enumeration value="chemical : isotopes : sulfur isotopes"></enumeration>
					  <enumeration value="chemical : isotopes : thorium isotopes"></enumeration>
					  <enumeration value="chemical : isotopes : tritium"></enumeration>
					  <enumeration value="chemical : isotopes : uranium isotopes"></enumeration>
					  <enumeration value="chemical : isotopes : isotopes (general)"></enumeration>
					  <enumeration value="chemical : lipids : Fischer-Tropsch"></enumeration>
					  <enumeration value="chemical : lipids : alkanes"></enumeration>
					  <enumeration value="chemical : lipids : carotenoids"></enumeration>
					  <enumeration value="chemical : lipids : fatty acids"></enumeration>
					  <enumeration value="chemical : lipids : glycerol dialkyl glycerol tetraethers (GDGTs)"></enumeration>
					  <enumeration value="chemical : lipids : hopanes"></enumeration>
					  <enumeration value="chemical : lipids : hopanoids"></enumeration>
					  <enumeration value="chemical : lipids : hydrocarbons"></enumeration>
					  <enumeration value="chemical : lipids : intact polar lipids"></enumeration>
					  <enumeration value="chemical : lipids : isoprenoids"></enumeration>
					  <enumeration value="chemical : lipids : kerogen"></enumeration>
					  <enumeration value="chemical : lipids : ladderanes"></enumeration>
					  <enumeration value="chemical : lipids : lipid biomarkers"></enumeration>
					  <enumeration value="chemical : lipids : lipid vesicles"></enumeration>
					  <enumeration value="chemical : lipids : liposomes"></enumeration>
					  <enumeration value="chemical : lipids : membrane evolution"></enumeration>
					  <enumeration value="chemical : lipids : membranes"></enumeration>
					  <enumeration value="chemical : lipids : phospholipid membranes"></enumeration>
					  <enumeration value="chemical : lipids : steranes"></enumeration>
					  <enumeration value="chemical : lipids : steroids"></enumeration>
					  <enumeration value="chemical : lipids : triterpene"></enumeration>
					  <enumeration value="chemical : lipids : lipids (general)"></enumeration>
					  <enumeration value="chemical : oligomer : collagen"></enumeration>
					  <enumeration value="chemical : oligomer : heterooligomer"></enumeration>
					  <enumeration value="chemical : oligomer : homooligomer"></enumeration>
					  <enumeration value="chemical : oligomer : oligomer (general)"></enumeration>
					  <enumeration value="chemical : prebiotic chemistry : polymerization"></enumeration>
					  <enumeration value="chemical : prebiotic chemistry : prebiotic metabolism"></enumeration>
					  <enumeration value="chemical : prebiotic chemistry : prebiotic peptides"></enumeration>
					  <enumeration value="chemical : prebiotic chemistry : prebiotic polymers"></enumeration>
					  <enumeration value="chemical : prebiotic chemistry : prebiotic synthesis"></enumeration>
					  <enumeration value="chemical : prebiotic chemistry : replication"></enumeration>
					  <enumeration value="chemical : prebiotic chemistry : prebiotic chemistry (general)"></enumeration>
					  <enumeration value="chemical : stereochemistry : constitutional isomers"></enumeration>
					  <enumeration value="chemical : stereochemistry : diastereomers"></enumeration>
					  <enumeration value="chemical : stereochemistry : enantiomers"></enumeration>
					  <enumeration value="chemical : stereochemistry : isomers"></enumeration>
					  <enumeration value="chemical : stereochemistry : stereoisomers"></enumeration>
					  <enumeration value="chemical : stereochemistry : stereochemistry (general)"></enumeration>
					  <enumeration value="chemical : subatomic particles : cosmic ray"></enumeration>
					  <enumeration value="chemical : subatomic particles : subatomic particles (general)"></enumeration>
					  <enumeration value="chemical : synthesis - abiotic : Fischer-Tropsch"></enumeration>
					  <enumeration value="chemical : synthesis - abiotic : Murchison meteorite"></enumeration>
					  <enumeration value="chemical : synthesis - abiotic : chemical evolution"></enumeration>
					  <enumeration value="chemical : synthesis - abiotic : polycyclic aromatic hydrocarbons (PAHs)"></enumeration>
					  <enumeration value="chemical : synthesis - abiotic : synthesis - abiotic (general)"></enumeration>
					  <enumeration value="computational : Bayesian methods"></enumeration>
					  <enumeration value="computational : Machine learning"></enumeration>
					  <enumeration value="computational : Neural networks"></enumeration>
					  <enumeration value="computational : computational (general)"></enumeration>
					  <enumeration value="environmental : atmospheres : Great Oxidation Event"></enumeration>
					  <enumeration value="environmental : atmospheres : Titan atmosphere"></enumeration>
					  <enumeration value="environmental : atmospheres : atmospheric composition"></enumeration>
					  <enumeration value="environmental : atmospheres : atmospheric oxygen"></enumeration>
					  <enumeration value="environmental : atmospheres : carbon dioxide clouds"></enumeration>
					  <enumeration value="environmental : atmospheres : clouds"></enumeration>
					  <enumeration value="environmental : atmospheres : dissociative recombination"></enumeration>
					  <enumeration value="environmental : atmospheres : exosphere"></enumeration>
					  <enumeration value="environmental : atmospheres : haze"></enumeration>
					  <enumeration value="environmental : atmospheres : mesosphere"></enumeration>
					  <enumeration value="environmental : atmospheres : paleoclimate"></enumeration>
					  <enumeration value="environmental : atmospheres : stratosphere"></enumeration>
					  <enumeration value="environmental : atmospheres : thermosphere"></enumeration>
					  <enumeration value="environmental : atmospheres : troposphere"></enumeration>
					  <enumeration value="environmental : atmospheres : atmospheres (general)"></enumeration>
					  <enumeration value="environmental : climate : albedo"></enumeration>
					  <enumeration value="environmental : climate : snowball Earth"></enumeration>
					  <enumeration value="environmental : climate : terraforming"></enumeration>
					  <enumeration value="environmental : climate : climate (general)"></enumeration>
					  <enumeration value="environmental : environments : Antarctica"></enumeration>
					  <enumeration value="environmental : environments : Cuatro Cienegas"></enumeration>
					  <enumeration value="environmental : environments : acidic environments"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Antarctica"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Atacama Desert"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Cuatro Cienegas"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Earth : Paleoarchean"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Earth : continental crust"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Earth : early Earth"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Earth : hominids"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Earth : low Earth orbit"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Earth : snowball Earth"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Earth : technosignatures"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Earth : Earth (general)"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Iceland"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Kamchatka"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Lake Vostok"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Lost City"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Mars analog"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Mars simulation facility"></enumeration>
					  <enumeration value="environmental : environments : analog environments : New Zealand"></enumeration>
					  <enumeration value="environmental : environments : analog environments : Pilbara Craton"></enumeration>
					  <enumeration value="environmental : environments : analog environments : acid mine drainage"></enumeration>
					  <enumeration value="environmental : environments : analog environments : acidic hypersaline"></enumeration>
					  <enumeration value="environmental : environments : analog environments : analog missions"></enumeration>
					  <enumeration value="environmental : environments : analog environments : caves"></enumeration>
					  <enumeration value="environmental : environments : analog environments : deep sea hypersaline anoxic basins"></enumeration>
					  <enumeration value="environmental : environments : analog environments : deep subsurface"></enumeration>
					  <enumeration value="environmental : environments : analog environments : desert crust"></enumeration>
					  <enumeration value="environmental : environments : analog environments : deserts"></enumeration>
					  <enumeration value="environmental : environments : analog environments : desiccation resistance"></enumeration>
					  <enumeration value="environmental : environments : analog environments : evaporites"></enumeration>
					  <enumeration value="environmental : environments : analog environments : glacial"></enumeration>
					  <enumeration value="environmental : environments : analog environments : habitability"></enumeration>
					  <enumeration value="environmental : environments : analog environments : hot springs"></enumeration>
					  <enumeration value="environmental : environments : analog environments : hydrothermal systems : Iceland"></enumeration>
					  <enumeration value="environmental : environments : analog environments : hydrothermal systems : Kamchatka"></enumeration>
					  <enumeration value="environmental : environments : analog environments : hydrothermal systems : Lost City"></enumeration>
					  <enumeration value="environmental : environments : analog environments : hydrothermal systems : New Zealand"></enumeration>
					  <enumeration value="environmental : environments : analog environments : hydrothermal systems : Yellowstone"></enumeration>
					  <enumeration value="environmental : environments : analog environments : hydrothermal systems : hotspots"></enumeration>
					  <enumeration value="environmental : environments : analog environments : hydrothermal systems : mid-ocean ridges"></enumeration>
					  <enumeration value="environmental : environments : analog environments : hydrothermal systems : sinters"></enumeration>
					  <enumeration value="environmental : environments : analog environments : hydrothermal systems : travertines"></enumeration>
					  <enumeration value="environmental : environments : analog environments : hydrothermal systems : hydrothermal systems (general)"></enumeration>
					  <enumeration value="environmental : environments : analog environments : hyperarid soils"></enumeration>
					  <enumeration value="environmental : environments : analog environments : permafrost"></enumeration>
					  <enumeration value="environmental : environments : analog environments : polar habitats"></enumeration>
					  <enumeration value="environmental : environments : analog environments : subglacial"></enumeration>
					  <enumeration value="environmental : environments : analog environments : subsurface"></enumeration>
					  <enumeration value="environmental : environments : analog environments : analog environments (general)"></enumeration>
					  <enumeration value="environmental : environments : anoxic environments"></enumeration>
					  <enumeration value="environmental : environments : biosphere"></enumeration>
					  <enumeration value="environmental : environments : caves"></enumeration>
					  <enumeration value="environmental : environments : continental crust"></enumeration>
					  <enumeration value="environmental : environments : cryosphere"></enumeration>
					  <enumeration value="environmental : environments : deep biosphere"></enumeration>
					  <enumeration value="environmental : environments : deep sea hypersaline anoxic basins"></enumeration>
					  <enumeration value="environmental : environments : deep subsurface"></enumeration>
					  <enumeration value="environmental : environments : extreme environments"></enumeration>
					  <enumeration value="environmental : environments : geothermal"></enumeration>
					  <enumeration value="environmental : environments : groundwater"></enumeration>
					  <enumeration value="environmental : environments : habitability"></enumeration>
					  <enumeration value="environmental : environments : habitable zone"></enumeration>
					  <enumeration value="environmental : environments : hydrothermal systems : Iceland"></enumeration>
					  <enumeration value="environmental : environments : hydrothermal systems : Kamchatka"></enumeration>
					  <enumeration value="environmental : environments : hydrothermal systems : Lost City"></enumeration>
					  <enumeration value="environmental : environments : hydrothermal systems : New Zealand"></enumeration>
					  <enumeration value="environmental : environments : hydrothermal systems : Yellowstone"></enumeration>
					  <enumeration value="environmental : environments : hydrothermal systems : hotspots"></enumeration>
					  <enumeration value="environmental : environments : hydrothermal systems : mid-ocean ridges"></enumeration>
					  <enumeration value="environmental : environments : hydrothermal systems : sinters"></enumeration>
					  <enumeration value="environmental : environments : hydrothermal systems : travertines"></enumeration>
					  <enumeration value="environmental : environments : hydrothermal systems : hydrothermal systems (general)"></enumeration>
					  <enumeration value="environmental : environments : hyperarid soils"></enumeration>
					  <enumeration value="environmental : environments : ices"></enumeration>
					  <enumeration value="environmental : environments : ocean"></enumeration>
					  <enumeration value="environmental : environments : paleoclimate"></enumeration>
					  <enumeration value="environmental : environments : paleosols"></enumeration>
					  <enumeration value="environmental : environments : permafrost"></enumeration>
					  <enumeration value="environmental : environments : polar habitats"></enumeration>
					  <enumeration value="environmental : environments : seafloor"></enumeration>
					  <enumeration value="environmental : environments : soil"></enumeration>
					  <enumeration value="environmental : environments : subsurface ocean"></enumeration>
					  <enumeration value="environmental : environments : water"></enumeration>
					  <enumeration value="environmental : environments : environments (general)"></enumeration>
					  <enumeration value="environmental : radiation : albedo"></enumeration>
					  <enumeration value="environmental : radiation : cosmic ray"></enumeration>
					  <enumeration value="environmental : radiation : disk-averaged spectra"></enumeration>
					  <enumeration value="environmental : radiation : energetic particles"></enumeration>
					  <enumeration value="environmental : radiation : energy"></enumeration>
					  <enumeration value="environmental : radiation : gamma ray bursts"></enumeration>
					  <enumeration value="environmental : radiation : infrared"></enumeration>
					  <enumeration value="environmental : radiation : ionizing radiation"></enumeration>
					  <enumeration value="environmental : radiation : maser radiation"></enumeration>
					  <enumeration value="environmental : radiation : radiation resistance"></enumeration>
					  <enumeration value="environmental : radiation : radiolysis"></enumeration>
					  <enumeration value="environmental : radiation : solar flux"></enumeration>
					  <enumeration value="environmental : radiation : space radiation"></enumeration>
					  <enumeration value="environmental : radiation : ultraviolet (UV)"></enumeration>
					  <enumeration value="environmental : radiation : radiation (general)"></enumeration>
					  <enumeration value="environmental : radiation : _Deinococcus radiodurans_"></enumeration>
					  <enumeration value="environmental : environmental (general)"></enumeration>
					  <enumeration value="exploration : SETI : Drake Equation"></enumeration>
					  <enumeration value="exploration : SETI : Fermi paradox"></enumeration>
					  <enumeration value="exploration : SETI : alien life"></enumeration>
					  <enumeration value="exploration : SETI : artificial transits"></enumeration>
					  <enumeration value="exploration : SETI : extraterrestrial civilizations"></enumeration>
					  <enumeration value="exploration : SETI : extraterrestrial intelligence"></enumeration>
					  <enumeration value="exploration : SETI : extraterrestrial life"></enumeration>
					  <enumeration value="exploration : SETI : optical SETI"></enumeration>
					  <enumeration value="exploration : SETI : technosignatures"></enumeration>
					  <enumeration value="exploration : SETI : universal biology"></enumeration>
					  <enumeration value="exploration : SETI : SETI (general)"></enumeration>
					  <enumeration value="exploration : analog environments : Antarctica"></enumeration>
					  <enumeration value="exploration : analog environments : Atacama Desert"></enumeration>
					  <enumeration value="exploration : analog environments : Cuatro Cienegas"></enumeration>
					  <enumeration value="exploration : analog environments : Earth : Paleoarchean"></enumeration>
					  <enumeration value="exploration : analog environments : Earth : continental crust"></enumeration>
					  <enumeration value="exploration : analog environments : Earth : early Earth"></enumeration>
					  <enumeration value="exploration : analog environments : Earth : hominids"></enumeration>
					  <enumeration value="exploration : analog environments : Earth : low Earth orbit"></enumeration>
					  <enumeration value="exploration : analog environments : Earth : snowball Earth"></enumeration>
					  <enumeration value="exploration : analog environments : Earth : technosignatures"></enumeration>
					  <enumeration value="exploration : analog environments : Earth : Earth (general)"></enumeration>
					  <enumeration value="exploration : analog environments : Iceland"></enumeration>
					  <enumeration value="exploration : analog environments : Kamchatka"></enumeration>
					  <enumeration value="exploration : analog environments : Lake Vostok"></enumeration>
					  <enumeration value="exploration : analog environments : Lost City"></enumeration>
					  <enumeration value="exploration : analog environments : Mars analog"></enumeration>
					  <enumeration value="exploration : analog environments : Mars simulation facility"></enumeration>
					  <enumeration value="exploration : analog environments : New Zealand"></enumeration>
					  <enumeration value="exploration : analog environments : Pilbara Craton"></enumeration>
					  <enumeration value="exploration : analog environments : acid mine drainage"></enumeration>
					  <enumeration value="exploration : analog environments : acidic hypersaline"></enumeration>
					  <enumeration value="exploration : analog environments : analog missions"></enumeration>
					  <enumeration value="exploration : analog environments : caves"></enumeration>
					  <enumeration value="exploration : analog environments : deep sea hypersaline anoxic basins"></enumeration>
					  <enumeration value="exploration : analog environments : deep subsurface"></enumeration>
					  <enumeration value="exploration : analog environments : desert crust"></enumeration>
					  <enumeration value="exploration : analog environments : deserts"></enumeration>
					  <enumeration value="exploration : analog environments : desiccation resistance"></enumeration>
					  <enumeration value="exploration : analog environments : evaporites"></enumeration>
					  <enumeration value="exploration : analog environments : glacial"></enumeration>
					  <enumeration value="exploration : analog environments : habitability"></enumeration>
					  <enumeration value="exploration : analog environments : hot springs"></enumeration>
					  <enumeration value="exploration : analog environments : hydrothermal systems : Iceland"></enumeration>
					  <enumeration value="exploration : analog environments : hydrothermal systems : Kamchatka"></enumeration>
					  <enumeration value="exploration : analog environments : hydrothermal systems : Lost City"></enumeration>
					  <enumeration value="exploration : analog environments : hydrothermal systems : New Zealand"></enumeration>
					  <enumeration value="exploration : analog environments : hydrothermal systems : Yellowstone"></enumeration>
					  <enumeration value="exploration : analog environments : hydrothermal systems : hotspots"></enumeration>
					  <enumeration value="exploration : analog environments : hydrothermal systems : mid-ocean ridges"></enumeration>
					  <enumeration value="exploration : analog environments : hydrothermal systems : sinters"></enumeration>
					  <enumeration value="exploration : analog environments : hydrothermal systems : travertines"></enumeration>
					  <enumeration value="exploration : analog environments : hydrothermal systems : hydrothermal systems (general)"></enumeration>
					  <enumeration value="exploration : analog environments : hyperarid soils"></enumeration>
					  <enumeration value="exploration : analog environments : permafrost"></enumeration>
					  <enumeration value="exploration : analog environments : polar habitats"></enumeration>
					  <enumeration value="exploration : analog environments : subglacial"></enumeration>
					  <enumeration value="exploration : analog environments : subsurface"></enumeration>
					  <enumeration value="exploration : analog environments : analog environments (general)"></enumeration>
					  <enumeration value="exploration : missions : Biology and Mars Experiments (BioMEx)"></enumeration>
					  <enumeration value="exploration : missions : Cassini"></enumeration>
					  <enumeration value="exploration : missions : CubeSat"></enumeration>
					  <enumeration value="exploration : missions : ExoMars"></enumeration>
					  <enumeration value="exploration : missions : Expose-R"></enumeration>
					  <enumeration value="exploration : missions : Harps search"></enumeration>
					  <enumeration value="exploration : missions : Hubble Space Telescope"></enumeration>
					  <enumeration value="exploration : missions : Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (INSIGHT)"></enumeration>
					  <enumeration value="exploration : missions : Kepler"></enumeration>
					  <enumeration value="exploration : missions : Mars 2020 mission"></enumeration>
					  <enumeration value="exploration : missions : Mars Atmosphere and Volatile Evolution (MAVEN)"></enumeration>
					  <enumeration value="exploration : missions : Mars Exploration rovers"></enumeration>
					  <enumeration value="exploration : missions : Mars Opportunity rover"></enumeration>
					  <enumeration value="exploration : missions : Mars Science Laboratory (MSL) Curiosity rover"></enumeration>
					  <enumeration value="exploration : missions : Mars Spirit rover"></enumeration>
					  <enumeration value="exploration : missions : Omega/Mars Express"></enumeration>
					  <enumeration value="exploration : missions : Phoenix Mission"></enumeration>
					  <enumeration value="exploration : missions : Terrestrial Planet Finder (TPF)"></enumeration>
					  <enumeration value="exploration : missions : Viking Mission"></enumeration>
					  <enumeration value="exploration : missions : analog missions"></enumeration>
					  <enumeration value="exploration : missions : human Mars exploration"></enumeration>
					  <enumeration value="exploration : missions : low Earth orbit"></enumeration>
					  <enumeration value="exploration : missions : mission concept"></enumeration>
					  <enumeration value="exploration : missions : orbital mechanics"></enumeration>
					  <enumeration value="exploration : missions : missions (general)"></enumeration>
					  <enumeration value="exploration : origins of life : _in vitro_ selection"></enumeration>
					  <enumeration value="exploration : origins of life : GADV hypothesis"></enumeration>
					  <enumeration value="exploration : origins of life : Miller-Urey experiment"></enumeration>
					  <enumeration value="exploration : origins of life : Murchison meteorite"></enumeration>
					  <enumeration value="exploration : origins of life : RNA world"></enumeration>
					  <enumeration value="exploration : origins of life : TCA cycle"></enumeration>
					  <enumeration value="exploration : origins of life : aldehydes"></enumeration>
					  <enumeration value="exploration : origins of life : autocatalytic network"></enumeration>
					  <enumeration value="exploration : origins of life : automaton"></enumeration>
					  <enumeration value="exploration : origins of life : autopoiesis"></enumeration>
					  <enumeration value="exploration : origins of life : biogenesis"></enumeration>
					  <enumeration value="exploration : origins of life : chemical evolution"></enumeration>
					  <enumeration value="exploration : origins of life : chirality : chiral amplification"></enumeration>
					  <enumeration value="exploration : origins of life : chirality : chiroselection"></enumeration>
					  <enumeration value="exploration : origins of life : chirality : circular polarization"></enumeration>
					  <enumeration value="exploration : origins of life : chirality : enantiomeric excess"></enumeration>
					  <enumeration value="exploration : origins of life : chirality : enantiomers"></enumeration>
					  <enumeration value="exploration : origins of life : chirality : enantioselective separation"></enumeration>
					  <enumeration value="exploration : origins of life : chirality : enantiotopic"></enumeration>
					  <enumeration value="exploration : origins of life : chirality : homochirality"></enumeration>
					  <enumeration value="exploration : origins of life : chirality : polarization : circular polarization"></enumeration>
					  <enumeration value="exploration : origins of life : chirality : polarization : linear polarization"></enumeration>
					  <enumeration value="exploration : origins of life : chirality : polarization : optical activity"></enumeration>
					  <enumeration value="exploration : origins of life : chirality : polarization : polarization (general)"></enumeration>
					  <enumeration value="exploration : origins of life : chirality : racemic"></enumeration>
					  <enumeration value="exploration : origins of life : chirality : chirality (general)"></enumeration>
					  <enumeration value="exploration : origins of life : definition of life"></enumeration>
					  <enumeration value="exploration : origins of life : density functional theory"></enumeration>
					  <enumeration value="exploration : origins of life : diketopiperazine"></enumeration>
					  <enumeration value="exploration : origins of life : encapsulation"></enumeration>
					  <enumeration value="exploration : origins of life : hypercycles"></enumeration>
					  <enumeration value="exploration : origins of life : last universal common ancestor (LUCA)"></enumeration>
					  <enumeration value="exploration : origins of life : lipid vesicles"></enumeration>
					  <enumeration value="exploration : origins of life : metabolic cycles"></enumeration>
					  <enumeration value="exploration : origins of life : nascent RNA scanning"></enumeration>
					  <enumeration value="exploration : origins of life : prebiotic environment"></enumeration>
					  <enumeration value="exploration : origins of life : prebiotic metabolism"></enumeration>
					  <enumeration value="exploration : origins of life : prebiotic peptides"></enumeration>
					  <enumeration value="exploration : origins of life : prebiotic polymers"></enumeration>
					  <enumeration value="exploration : origins of life : prebiotic synthesis"></enumeration>
					  <enumeration value="exploration : origins of life : proto-metabolism"></enumeration>
					  <enumeration value="exploration : origins of life : protocell"></enumeration>
					  <enumeration value="exploration : origins of life : self-assembly"></enumeration>
					  <enumeration value="exploration : origins of life : self-replication"></enumeration>
					  <enumeration value="exploration : origins of life : origins of life (general)"></enumeration>
					  <enumeration value="exploration : planetary protection : COSPAR policy"></enumeration>
					  <enumeration value="exploration : planetary protection : bioburden"></enumeration>
					  <enumeration value="exploration : planetary protection : clean room"></enumeration>
					  <enumeration value="exploration : planetary protection : contamination: back"></enumeration>
					  <enumeration value="exploration : planetary protection : contamination: forward"></enumeration>
					  <enumeration value="exploration : planetary protection : organic decontamination"></enumeration>
					  <enumeration value="exploration : planetary protection : special regions"></enumeration>
					  <enumeration value="exploration : planetary protection : planetary protection (general)"></enumeration>
					  <enumeration value="exploration : programs/projects : Eta-Earth"></enumeration>
					  <enumeration value="exploration : programs/projects : Expose-R"></enumeration>
					  <enumeration value="exploration : programs/projects : From Early Cells to Multicellularity"></enumeration>
					  <enumeration value="exploration : programs/projects : Mars Exploration Program"></enumeration>
					  <enumeration value="exploration : programs/projects : NASA Astrobiology Program"></enumeration>
					  <enumeration value="exploration : programs/projects : Network for Life Detection (NfoLD)"></enumeration>
					  <enumeration value="exploration : programs/projects : Network for Ocean Worlds (NOW)"></enumeration>
					  <enumeration value="exploration : programs/projects : Nexus for Exoplanet System Science (NExSS)"></enumeration>
					  <enumeration value="exploration : programs/projects : Prebiotic Chemistry and Early Earth Environments (PCE3)"></enumeration>
					  <enumeration value="exploration : programs/projects : programs/projects (general)"></enumeration>
					  <enumeration value="exploration : space agencies : Canadian Space Agency (CSA)"></enumeration>
					  <enumeration value="exploration : space agencies : China National Space Administration (CNSA)"></enumeration>
					  <enumeration value="exploration : space agencies : European Space Agency (ESA)"></enumeration>
					  <enumeration value="exploration : space agencies : Indian Space Research Organisation (ISRO)"></enumeration>
					  <enumeration value="exploration : space agencies : Japan Aerospace Exploration Agency (JAXA)"></enumeration>
					  <enumeration value="exploration : space agencies : National Aeronautics and Space Administration (NASA)"></enumeration>
					  <enumeration value="exploration : space agencies : Russian Federal Space Agency (ROSCOSMOS)"></enumeration>
					  <enumeration value="exploration : space agencies : space agencies (general)"></enumeration>
					  <enumeration value="exploration : spacecraft : International Space Station (ISS)"></enumeration>
					  <enumeration value="exploration : spacecraft : James Webb Space Telescope"></enumeration>
					  <enumeration value="exploration : spacecraft : Kepler"></enumeration>
					  <enumeration value="exploration : spacecraft : Mars Curiosity rover"></enumeration>
					  <enumeration value="exploration : spacecraft : Mars Opportunity rover"></enumeration>
					  <enumeration value="exploration : spacecraft : Mars Spirit rover"></enumeration>
					  <enumeration value="exploration : spacecraft : spacecraft (general)"></enumeration>
					  <enumeration value="geological : ejecta : distal ejecta"></enumeration>
					  <enumeration value="geological : ejecta : impact"></enumeration>
					  <enumeration value="geological : ejecta : impacts : K-T event"></enumeration>
					  <enumeration value="geological : ejecta : impacts : crater"></enumeration>
					  <enumeration value="geological : ejecta : impacts : late heavy bombardment"></enumeration>
					  <enumeration value="geological : ejecta : impacts : shocked quartz"></enumeration>
					  <enumeration value="geological : ejecta : impacts : impacts (general)"></enumeration>
					  <enumeration value="geological : ejecta : proximal ejecta"></enumeration>
					  <enumeration value="geological : ejecta : stellar"></enumeration>
					  <enumeration value="geological : ejecta : volcanic ejecta"></enumeration>
					  <enumeration value="geological : ejecta : ejecta (general)"></enumeration>
					  <enumeration value="geological : geologic ages : Archean eon"></enumeration>
					  <enumeration value="geological : geologic ages : Cretaceous-Palaeogene boundary"></enumeration>
					  <enumeration value="geological : geologic ages : Great Oxidation Event"></enumeration>
					  <enumeration value="geological : geologic ages : Hadean"></enumeration>
					  <enumeration value="geological : geologic ages : Hesperian"></enumeration>
					  <enumeration value="geological : geologic ages : Holocene"></enumeration>
					  <enumeration value="geological : geologic ages : Noachian"></enumeration>
					  <enumeration value="geological : geologic ages : Paleoarchean"></enumeration>
					  <enumeration value="geological : geologic ages : Phanerozoic"></enumeration>
					  <enumeration value="geological : geologic ages : Precambrian"></enumeration>
					  <enumeration value="geological : geologic ages : Proterozoic"></enumeration>
					  <enumeration value="geological : geologic ages : anthropocene"></enumeration>
					  <enumeration value="geological : geologic ages : geologic ages (general)"></enumeration>
					  <enumeration value="geological : geologic province : Barberton"></enumeration>
					  <enumeration value="geological : geologic province : Pilbara Craton"></enumeration>
					  <enumeration value="geological : geologic province : geologic province (general)"></enumeration>
					  <enumeration value="geological : geologic unit : Apex Chert"></enumeration>
					  <enumeration value="geological : geologic unit : Barberton Greenstone Belt"></enumeration>
					  <enumeration value="geological : geologic unit : Buxa Formation"></enumeration>
					  <enumeration value="geological : geologic unit : Gunflint Formation"></enumeration>
					  <enumeration value="geological : geologic unit : Rhynie Chert"></enumeration>
					  <enumeration value="geological : geologic unit : Warrawoona Group"></enumeration>
					  <enumeration value="geological : geologic unit : geologic unit (general)"></enumeration>
					  <enumeration value="geological : impacts : K-T event"></enumeration>
					  <enumeration value="geological : impacts : crater"></enumeration>
					  <enumeration value="geological : impacts : late heavy bombardment"></enumeration>
					  <enumeration value="geological : impacts : shocked quartz"></enumeration>
					  <enumeration value="geological : impacts : impacts (general)"></enumeration>
					  <enumeration value="geological : minerals : borates"></enumeration>
					  <enumeration value="geological : minerals : brucite"></enumeration>
					  <enumeration value="geological : minerals : carbonates"></enumeration>
					  <enumeration value="geological : minerals : clays"></enumeration>
					  <enumeration value="geological : minerals : density functional theory"></enumeration>
					  <enumeration value="geological : minerals : desert crust"></enumeration>
					  <enumeration value="geological : minerals : ferrihydrite"></enumeration>
					  <enumeration value="geological : minerals : forsterite"></enumeration>
					  <enumeration value="geological : minerals : greigite"></enumeration>
					  <enumeration value="geological : minerals : gypsum"></enumeration>
					  <enumeration value="geological : minerals : hematite"></enumeration>
					  <enumeration value="geological : minerals : hygroscopic salts"></enumeration>
					  <enumeration value="geological : minerals : iron sulfides"></enumeration>
					  <enumeration value="geological : minerals : jarosite"></enumeration>
					  <enumeration value="geological : minerals : kaolinite"></enumeration>
					  <enumeration value="geological : minerals : mafic"></enumeration>
					  <enumeration value="geological : minerals : magnesium sulfates"></enumeration>
					  <enumeration value="geological : minerals : magnetite"></enumeration>
					  <enumeration value="geological : minerals : manganese oxides"></enumeration>
					  <enumeration value="geological : minerals : mineral surfaces"></enumeration>
					  <enumeration value="geological : minerals : mineral toxicity"></enumeration>
					  <enumeration value="geological : minerals : montmorillonite"></enumeration>
					  <enumeration value="geological : minerals : muscovite"></enumeration>
					  <enumeration value="geological : minerals : olivine"></enumeration>
					  <enumeration value="geological : minerals : palagonite"></enumeration>
					  <enumeration value="geological : minerals : perchlorates"></enumeration>
					  <enumeration value="geological : minerals : phosphates"></enumeration>
					  <enumeration value="geological : minerals : phyllosilicates"></enumeration>
					  <enumeration value="geological : minerals : pyrite"></enumeration>
					  <enumeration value="geological : minerals : quartz"></enumeration>
					  <enumeration value="geological : minerals : saponite"></enumeration>
					  <enumeration value="geological : minerals : sulfide"></enumeration>
					  <enumeration value="geological : minerals : zeolites"></enumeration>
					  <enumeration value="geological : minerals : minerals (general)"></enumeration>
					  <enumeration value="geological : rocks : andesite"></enumeration>
					  <enumeration value="geological : rocks : basalt"></enumeration>
					  <enumeration value="geological : rocks : basaltic glass"></enumeration>
					  <enumeration value="geological : rocks : carbonates"></enumeration>
					  <enumeration value="geological : rocks : chert"></enumeration>
					  <enumeration value="geological : rocks : dacite"></enumeration>
					  <enumeration value="geological : rocks : dunite"></enumeration>
					  <enumeration value="geological : rocks : iron formations"></enumeration>
					  <enumeration value="geological : rocks : limestone"></enumeration>
					  <enumeration value="geological : rocks : mafic"></enumeration>
					  <enumeration value="geological : rocks : mudstone"></enumeration>
					  <enumeration value="geological : rocks : peridotite"></enumeration>
					  <enumeration value="geological : rocks : phyllite"></enumeration>
					  <enumeration value="geological : rocks : pumice"></enumeration>
					  <enumeration value="geological : rocks : quartzite"></enumeration>
					  <enumeration value="geological : rocks : sandstone"></enumeration>
					  <enumeration value="geological : rocks : schist"></enumeration>
					  <enumeration value="geological : rocks : serpentinite"></enumeration>
					  <enumeration value="geological : rocks : shale"></enumeration>
					  <enumeration value="geological : rocks : siltstone"></enumeration>
					  <enumeration value="geological : rocks : slate"></enumeration>
					  <enumeration value="geological : rocks : rocks (general)"></enumeration>
					  <enumeration value="geological : sedimentary structures : bioturbation"></enumeration>
					  <enumeration value="geological : sedimentary structures : microbialites"></enumeration>
					  <enumeration value="geological : sedimentary structures : microbially-influenced sedimentary structures (MISS)"></enumeration>
					  <enumeration value="geological : sedimentary structures : stromatolites"></enumeration>
					  <enumeration value="geological : sedimentary structures : thrombolites"></enumeration>
					  <enumeration value="geological : sedimentary structures : trace fossils"></enumeration>
					  <enumeration value="geological : sedimentary structures : sedimentary structures (general)"></enumeration>
					  <enumeration value="geological : serpentinization : Lost City"></enumeration>
					  <enumeration value="geological : serpentinization : hydrogen"></enumeration>
					  <enumeration value="geological : serpentinization : ophiolite"></enumeration>
					  <enumeration value="geological : serpentinization : serpentinite"></enumeration>
					  <enumeration value="geological : serpentinization : serpentinization (general)"></enumeration>
					  <enumeration value="geological : volcanism : andesite"></enumeration>
					  <enumeration value="geological : volcanism : basalt"></enumeration>
					  <enumeration value="geological : volcanism : basaltic glass"></enumeration>
					  <enumeration value="geological : volcanism : cinder cones"></enumeration>
					  <enumeration value="geological : volcanism : dacite"></enumeration>
					  <enumeration value="geological : volcanism : peridotite"></enumeration>
					  <enumeration value="geological : volcanism : pumice"></enumeration>
					  <enumeration value="geological : volcanism : volcanism (general)"></enumeration>
					  <enumeration value="institutional : education/outreach : NASA Academy"></enumeration>
					  <enumeration value="institutional : education/outreach : NASA Earth and Space Science Fellowship (NESSF)"></enumeration>
					  <enumeration value="institutional : education/outreach : NASA Pathways Intern Employment Program (IEP)"></enumeration>
					  <enumeration value="institutional : education/outreach : NASA Planetary Geology and Geophysics Program"></enumeration>
					  <enumeration value="institutional : education/outreach : NASA Postdoctoral Program (NPP)"></enumeration>
					  <enumeration value="institutional : education/outreach : NASA Space Technology Research Fellowship (NSTRF)"></enumeration>
					  <enumeration value="institutional : education/outreach : NASA internship program"></enumeration>
					  <enumeration value="institutional : education/outreach : National Space Grant College"></enumeration>
					  <enumeration value="institutional : education/outreach : SETI Research Experiences for Undergraduates (REU)"></enumeration>
					  <enumeration value="institutional : education/outreach : STEM"></enumeration>
					  <enumeration value="institutional : education/outreach : astrobiology education"></enumeration>
					  <enumeration value="institutional : education/outreach : education/outreach (general)"></enumeration>
					  <enumeration value="institutional : missions : Biology and Mars Experiments (BioMEx)"></enumeration>
					  <enumeration value="institutional : missions : Cassini"></enumeration>
					  <enumeration value="institutional : missions : CubeSat"></enumeration>
					  <enumeration value="institutional : missions : ExoMars"></enumeration>
					  <enumeration value="institutional : missions : Expose-R"></enumeration>
					  <enumeration value="institutional : missions : Harps search"></enumeration>
					  <enumeration value="institutional : missions : Hubble Space Telescope"></enumeration>
					  <enumeration value="institutional : missions : Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (INSIGHT)"></enumeration>
					  <enumeration value="institutional : missions : Kepler"></enumeration>
					  <enumeration value="institutional : missions : Mars 2020 mission"></enumeration>
					  <enumeration value="institutional : missions : Mars Atmosphere and Volatile Evolution (MAVEN)"></enumeration>
					  <enumeration value="institutional : missions : Mars Exploration rovers"></enumeration>
					  <enumeration value="institutional : missions : Mars Opportunity rover"></enumeration>
					  <enumeration value="institutional : missions : Mars Science Laboratory (MSL) Curiosity Rover"></enumeration>
					  <enumeration value="institutional : missions : Mars Spirit rover"></enumeration>
					  <enumeration value="institutional : missions : Mars Viking Mission"></enumeration>
					  <enumeration value="institutional : missions : Omega/Mars Express"></enumeration>
					  <enumeration value="institutional : missions : Phoenix Mission"></enumeration>
					  <enumeration value="institutional : missions : Terrestrial Planet Finder (TPF)"></enumeration>
					  <enumeration value="institutional : missions : analog missions"></enumeration>
					  <enumeration value="institutional : missions : human Mars exploration"></enumeration>
					  <enumeration value="institutional : missions : low Earth orbit"></enumeration>
					  <enumeration value="institutional : missions : mission concept"></enumeration>
					  <enumeration value="institutional : missions : orbital mechanics"></enumeration>
					  <enumeration value="institutional : missions : missions (general)"></enumeration>
					  <enumeration value="institutional : programs/projects : Eta-Earth"></enumeration>
					  <enumeration value="institutional : programs/projects : Expose-R"></enumeration>
					  <enumeration value="institutional : programs/projects : From Early Cells to Multicellularity"></enumeration>
					  <enumeration value="institutional : programs/projects : Mars Exploration Program"></enumeration>
					  <enumeration value="institutional : programs/projects : NASA Astrobiology Program"></enumeration>
					  <enumeration value="institutional : programs/projects : Network for Life Detection (NfoLD)"></enumeration>
					  <enumeration value="institutional : programs/projects : Network for Ocean Worlds (NOW)"></enumeration>
					  <enumeration value="institutional : programs/projects : Nexus for Exoplanet System Science (NExSS)"></enumeration>
					  <enumeration value="institutional : programs/projects : Prebiotic Chemistry and Early Earth Environments (PCE3)"></enumeration>
					  <enumeration value="institutional : programs/projects : programs/projects (general)"></enumeration>
					  <enumeration value="institutional : space agencies : Canadian Space Agency (CSA)"></enumeration>
					  <enumeration value="institutional : space agencies : China National Space Administration (CNSA)"></enumeration>
					  <enumeration value="institutional : space agencies : European Space Agency (ESA)"></enumeration>
					  <enumeration value="institutional : space agencies : Indian Space Research Organization (ISRO)"></enumeration>
					  <enumeration value="institutional : space agencies : Japan Aerospace Exploration Agency (JAXA)"></enumeration>
					  <enumeration value="institutional : space agencies : National Aeronautics and Space Administration (NASA)"></enumeration>
					  <enumeration value="institutional : space agencies : Russian Federal Space Agency (ROSCOSMOS)"></enumeration>
					  <enumeration value="institutional : space agencies : space agencies (general)"></enumeration>
					  <enumeration value="institutional : spacecraft : International Space Station (ISS)"></enumeration>
					  <enumeration value="institutional : spacecraft : James Webb Space Telescope"></enumeration>
					  <enumeration value="institutional : spacecraft : Kepler"></enumeration>
					  <enumeration value="institutional : spacecraft : Mars Curiosity rover"></enumeration>
					  <enumeration value="institutional : spacecraft : Mars Opportunity rover"></enumeration>
					  <enumeration value="institutional : spacecraft : Mars Spirit rover"></enumeration>
					  <enumeration value="institutional : spacecraft : spacecraft (general)"></enumeration>
					  <enumeration value="methods : CT-scan"></enumeration>
					  <enumeration value="methods : FTIR"></enumeration>
					  <enumeration value="methods : Raman spectroscopy"></enumeration>
					  <enumeration value="methods : ToF-SIMS"></enumeration>
					  <enumeration value="methods : X-ray diffraction (XRD)"></enumeration>
					  <enumeration value="methods : X-ray fluorescence (XRF)"></enumeration>
					  <enumeration value="methods : X-ray scattering"></enumeration>
					  <enumeration value="methods : aerogel collection"></enumeration>
					  <enumeration value="methods : amino acid analysis"></enumeration>
					  <enumeration value="methods : apodization"></enumeration>
					  <enumeration value="methods : chromatography"></enumeration>
					  <enumeration value="methods : climate modeling"></enumeration>
					  <enumeration value="methods : compound specific isotope analysis (CSIA)"></enumeration>
					  <enumeration value="methods : dosimetry"></enumeration>
					  <enumeration value="methods : electron microscopy"></enumeration>
					  <enumeration value="methods : enantioselective separation"></enumeration>
					  <enumeration value="methods : enrichment cultures"></enumeration>
					  <enumeration value="methods : fluorescence microscopy"></enumeration>
					  <enumeration value="methods : gel electrophoresis"></enumeration>
					  <enumeration value="methods : immunoassay"></enumeration>
					  <enumeration value="methods : infrared spectroscopy"></enumeration>
					  <enumeration value="methods : ion chromatography"></enumeration>
					  <enumeration value="methods : laser ablation"></enumeration>
					  <enumeration value="methods : laser-induced breakdown spectroscopy"></enumeration>
					  <enumeration value="methods : liquid chromatography"></enumeration>
					  <enumeration value="methods : mass spectrometry"></enumeration>
					  <enumeration value="methods : microfluidics"></enumeration>
					  <enumeration value="methods : molecular dynamics"></enumeration>
					  <enumeration value="methods : nanopore sequencing"></enumeration>
					  <enumeration value="methods : photometry"></enumeration>
					  <enumeration value="methods : polymerase chain reaction (PCR)"></enumeration>
					  <enumeration value="methods : pulse amplitude modulated (PAM) fluorometry"></enumeration>
					  <enumeration value="methods : pyrolysis"></enumeration>
					  <enumeration value="methods : remote sensing"></enumeration>
					  <enumeration value="methods : robotic sampling"></enumeration>
					  <enumeration value="methods : sequencing"></enumeration>
					  <enumeration value="methods : spectroscopy"></enumeration>
					  <enumeration value="methods : thermal emission"></enumeration>
					  <enumeration value="methods : thermogravimetric analysis"></enumeration>
					  <enumeration value="methods : tissue cultures"></enumeration>
					  <enumeration value="methods : methods (general)"></enumeration>
					  <enumeration value="planetary : Earth : Paleoarchean"></enumeration>
					  <enumeration value="planetary : Earth : continental crust"></enumeration>
					  <enumeration value="planetary : Earth : early Earth"></enumeration>
					  <enumeration value="planetary : Earth : hominids"></enumeration>
					  <enumeration value="planetary : Earth : low Earth orbit"></enumeration>
					  <enumeration value="planetary : Earth : snowball Earth"></enumeration>
					  <enumeration value="planetary : Earth : technosignatures"></enumeration>
					  <enumeration value="planetary : Earth : Earth (general)"></enumeration>
					  <enumeration value="planetary : Enceladus : plume"></enumeration>
					  <enumeration value="planetary : Enceladus : Enceladus (general)"></enumeration>
					  <enumeration value="planetary : Europa : plume"></enumeration>
					  <enumeration value="planetary : Europa : Europa (general)"></enumeration>
					  <enumeration value="planetary : Mars : Amazonian"></enumeration>
					  <enumeration value="planetary : Mars : Hesperian"></enumeration>
					  <enumeration value="planetary : Mars : Mars 2020 mission"></enumeration>
					  <enumeration value="planetary : Mars : Mars Exploration rovers"></enumeration>
					  <enumeration value="planetary : Mars : Mars Opportunity rover"></enumeration>
					  <enumeration value="planetary : Mars : Mars Phoenix Mission"></enumeration>
					  <enumeration value="planetary : Mars : Mars Science Laboratory (MSL) Curiosity rover"></enumeration>
					  <enumeration value="planetary : Mars : Mars Spirit rover"></enumeration>
					  <enumeration value="planetary : Mars : Mars analog"></enumeration>
					  <enumeration value="planetary : Mars : Mars regolith"></enumeration>
					  <enumeration value="planetary : Mars : Mars simulation facility"></enumeration>
					  <enumeration value="planetary : Mars : Meridiani Planum"></enumeration>
					  <enumeration value="planetary : Mars : Noachian"></enumeration>
					  <enumeration value="planetary : Mars : Olympus Mons"></enumeration>
					  <enumeration value="planetary : Mars : Omega/Mars Express"></enumeration>
					  <enumeration value="planetary : Mars : Valles Marineris"></enumeration>
					  <enumeration value="planetary : Mars : diagenesis"></enumeration>
					  <enumeration value="planetary : Mars : dust"></enumeration>
					  <enumeration value="planetary : Mars : early Mars"></enumeration>
					  <enumeration value="planetary : Mars : life detection"></enumeration>
					  <enumeration value="planetary : Mars : martian atmosphere"></enumeration>
					  <enumeration value="planetary : Mars : martian meteorite"></enumeration>
					  <enumeration value="planetary : Mars : martian meteorite AlH84001"></enumeration>
					  <enumeration value="planetary : Mars : planetary environments"></enumeration>
					  <enumeration value="planetary : Mars : regolith"></enumeration>
					  <enumeration value="planetary : Mars : weathering"></enumeration>
					  <enumeration value="planetary : Mars : Mars (general)"></enumeration>
					  <enumeration value="planetary : Moon : Aitken basin"></enumeration>
					  <enumeration value="planetary : Moon : aeolian processes"></enumeration>
					  <enumeration value="planetary : Moon : dunes"></enumeration>
					  <enumeration value="planetary : Moon : highlands"></enumeration>
					  <enumeration value="planetary : Moon : lunar dust simulant"></enumeration>
					  <enumeration value="planetary : Moon : mare"></enumeration>
					  <enumeration value="planetary : Moon : polar region"></enumeration>
					  <enumeration value="planetary : Moon : regolith"></enumeration>
					  <enumeration value="planetary : Moon : Moon (general)"></enumeration>
					  <enumeration value="planetary : Solar System : Kuiper belt"></enumeration>
					  <enumeration value="planetary : Solar System : Oort cloud"></enumeration>
					  <enumeration value="planetary : Solar System : Titan"></enumeration>
					  <enumeration value="planetary : Solar System : Venus"></enumeration>
					  <enumeration value="planetary : Solar System : achondrite"></enumeration>
					  <enumeration value="planetary : Solar System : asteroid belt"></enumeration>
					  <enumeration value="planetary : Solar System : carbonaceous chondrites"></enumeration>
					  <enumeration value="planetary : Solar System : centaurs"></enumeration>
					  <enumeration value="planetary : Solar System : chondrite"></enumeration>
					  <enumeration value="planetary : Solar System : ecliptic"></enumeration>
					  <enumeration value="planetary : Solar System : habitable zone"></enumeration>
					  <enumeration value="planetary : Solar System : haze"></enumeration>
					  <enumeration value="planetary : Solar System : interplanetary medium : astrochemistry"></enumeration>
					  <enumeration value="planetary : Solar System : interplanetary medium : interplanetary dust"></enumeration>
					  <enumeration value="planetary : Solar System : interplanetary medium : interplanetary gas"></enumeration>
					  <enumeration value="planetary : Solar System : interplanetary medium : interplanetary medium (general)"></enumeration>
					  <enumeration value="planetary : Solar System : terrestrial planet"></enumeration>
					  <enumeration value="planetary : Solar System : Solar System (general)"></enumeration>
					  <enumeration value="planetary : Sun : G-type stars"></enumeration>
					  <enumeration value="planetary : Sun : Parker Solar Probe"></enumeration>
					  <enumeration value="planetary : Sun : eclipse"></enumeration>
					  <enumeration value="planetary : Sun : faint young Sun"></enumeration>
					  <enumeration value="planetary : Sun : solar flux"></enumeration>
					  <enumeration value="planetary : Sun : solar spot"></enumeration>
					  <enumeration value="planetary : Sun : Sun (general)"></enumeration>
					  <enumeration value="planetary : asteroids : C-type"></enumeration>
					  <enumeration value="planetary : asteroids : M-type"></enumeration>
					  <enumeration value="planetary : asteroids : S-type"></enumeration>
					  <enumeration value="planetary : asteroids : asteroid belt"></enumeration>
					  <enumeration value="planetary : asteroids : centaurs"></enumeration>
					  <enumeration value="planetary : asteroids : near-Earth objects (NEOs)"></enumeration>
					  <enumeration value="planetary : asteroids : asteroids (general)"></enumeration>
					  <enumeration value="planetary : comets : 67-P"></enumeration>
					  <enumeration value="planetary : comets : 81P/Wild (Wild 2)"></enumeration>
					  <enumeration value="planetary : comets : Hale-Bopp"></enumeration>
					  <enumeration value="planetary : comets : Halley"></enumeration>
					  <enumeration value="planetary : comets : Oort cloud"></enumeration>
					  <enumeration value="planetary : comets : comets (general)"></enumeration>
					  <enumeration value="planetary : ejecta : distal ejecta"></enumeration>
					  <enumeration value="planetary : ejecta : impact"></enumeration>
					  <enumeration value="planetary : ejecta : impacts : K-T event"></enumeration>
					  <enumeration value="planetary : ejecta : impacts : crater"></enumeration>
					  <enumeration value="planetary : ejecta : impacts : late heavy bombardment"></enumeration>
					  <enumeration value="planetary : ejecta : impacts : shocked quartz"></enumeration>
					  <enumeration value="planetary : ejecta : impacts : impacts (general)"></enumeration>
					  <enumeration value="planetary : ejecta : proximal ejecta"></enumeration>
					  <enumeration value="planetary : ejecta : stellar"></enumeration>
					  <enumeration value="planetary : ejecta : volcanic ejecta"></enumeration>
					  <enumeration value="planetary : ejecta : ejecta (general)"></enumeration>
					  <enumeration value="planetary : impacts : K-T event"></enumeration>
					  <enumeration value="planetary : impacts : crater"></enumeration>
					  <enumeration value="planetary : impacts : late heavy bombardment"></enumeration>
					  <enumeration value="planetary : impacts : shocked quartz"></enumeration>
					  <enumeration value="planetary : impacts : impacts (general)"></enumeration>
					  <enumeration value="planetary : interplanetary medium : astrochemistry"></enumeration>
					  <enumeration value="planetary : interplanetary medium : interplanetary dust"></enumeration>
					  <enumeration value="planetary : interplanetary medium : interplanetary gas"></enumeration>
					  <enumeration value="planetary : interplanetary medium : interplanetary medium (general)"></enumeration>
					  <enumeration value="planetary : meteorites : Murchison meteorite"></enumeration>
					  <enumeration value="planetary : meteorites : SNC Meteorites"></enumeration>
					  <enumeration value="planetary : meteorites : achondrite"></enumeration>
					  <enumeration value="planetary : meteorites : carbonaceous chondrites"></enumeration>
					  <enumeration value="planetary : meteorites : chondrite"></enumeration>
					  <enumeration value="planetary : meteorites : delta aminolevulinic acid"></enumeration>
					  <enumeration value="planetary : meteorites : martian meteorite"></enumeration>
					  <enumeration value="planetary : meteorites : martian meteorite AlH84001"></enumeration>
					  <enumeration value="planetary : meteorites : meteorite impact"></enumeration>
					  <enumeration value="planetary : meteorites : meteorites (general)"></enumeration>
					  <enumeration value="planetary : ocean worlds : Callisto"></enumeration>
					  <enumeration value="planetary : ocean worlds : Enceladus : plume"></enumeration>
					  <enumeration value="planetary : ocean worlds : Enceladus : Enceladus (general)"></enumeration>
					  <enumeration value="planetary : ocean worlds : Europa : plume"></enumeration>
					  <enumeration value="planetary : ocean worlds : Europa : Europa (general)"></enumeration>
					  <enumeration value="planetary : ocean worlds : Ganymede"></enumeration>
					  <enumeration value="planetary : ocean worlds : Pluto"></enumeration>
					  <enumeration value="planetary : ocean worlds : life detection"></enumeration>
					  <enumeration value="planetary : ocean worlds : planetary environments"></enumeration>
					  <enumeration value="planetary : ocean worlds : ocean worlds (general)"></enumeration>
					  <enumeration value="planetary : panspermia : directed panspermia"></enumeration>
					  <enumeration value="planetary : panspermia : lithopanspermia"></enumeration>
					  <enumeration value="planetary : panspermia : pseudo-panspermia"></enumeration>
					  <enumeration value="planetary : panspermia : panspermia (general)"></enumeration>
					  <enumeration value="planetary : planetary phenomena : apogee"></enumeration>
					  <enumeration value="planetary : planetary phenomena : circumbinary planet"></enumeration>
					  <enumeration value="planetary : planetary phenomena : late heavy bombardment"></enumeration>
					  <enumeration value="planetary : planetary phenomena : magnetic fields"></enumeration>
					  <enumeration value="planetary : planetary phenomena : microgravity"></enumeration>
					  <enumeration value="planetary : planetary phenomena : perigee"></enumeration>
					  <enumeration value="planetary : planetary phenomena : super-Earths"></enumeration>
					  <enumeration value="planetary : planetary phenomena : planetary phenomena (general)"></enumeration>
					  <enumeration value="planetary : planetary systems : Gliese-876"></enumeration>
					  <enumeration value="planetary : planetary systems : Kepler-90"></enumeration>
					  <enumeration value="planetary : planetary systems : planetary systems (general)"></enumeration>
					  <enumeration value="planetary : planets and satellites : Drake Equation"></enumeration>
					  <enumeration value="planetary : planets and satellites : Earth : Paleoarchean"></enumeration>
					  <enumeration value="planetary : planets and satellites : Earth : continental crust"></enumeration>
					  <enumeration value="planetary : planets and satellites : Earth : early Earth"></enumeration>
					  <enumeration value="planetary : planets and satellites : Earth : hominids"></enumeration>
					  <enumeration value="planetary : planets and satellites : Earth : low Earth orbit"></enumeration>
					  <enumeration value="planetary : planets and satellites : Earth : snowball Earth"></enumeration>
					  <enumeration value="planetary : planets and satellites : Earth : technosignatures"></enumeration>
					  <enumeration value="planetary : planets and satellites : Earth : Earth (general)"></enumeration>
					  <enumeration value="planetary : planets and satellites : Earth-like planet"></enumeration>
					  <enumeration value="planetary : planets and satellites : Enceladus : plume"></enumeration>
					  <enumeration value="planetary : planets and satellites : Enceladus : Enceladus (general)"></enumeration>
					  <enumeration value="planetary : planets and satellites : Europa : plume"></enumeration>
					  <enumeration value="planetary : planets and satellites : Europa : Europa (general)"></enumeration>
					  <enumeration value="planetary : planets and satellites : Galilean satellites"></enumeration>
					  <enumeration value="planetary : planets and satellites : HD 189733b"></enumeration>
					  <enumeration value="planetary : planets and satellites : Jupiter"></enumeration>
					  <enumeration value="planetary : planets and satellites : Mercury"></enumeration>
					  <enumeration value="planetary : planets and satellites : Moon : Aitken basin"></enumeration>
					  <enumeration value="planetary : planets and satellites : Moon : highlands"></enumeration>
					  <enumeration value="planetary : planets and satellites : Moon : lunar dust simulant"></enumeration>
					  <enumeration value="planetary : planets and satellites : Moon : mare"></enumeration>
					  <enumeration value="planetary : planets and satellites : Moon : regolith"></enumeration>
					  <enumeration value="planetary : planets and satellites : Moon : Moon (general)"></enumeration>
					  <enumeration value="planetary : planets and satellites : Pluto"></enumeration>
					  <enumeration value="planetary : planets and satellites : Saturn"></enumeration>
					  <enumeration value="planetary : planets and satellites : Titan"></enumeration>
					  <enumeration value="planetary : planets and satellites : Titan atmosphere"></enumeration>
					  <enumeration value="planetary : planets and satellites : Venus"></enumeration>
					  <enumeration value="planetary : planets and satellites : atmospheres"></enumeration>
					  <enumeration value="planetary : planets and satellites : detection"></enumeration>
					  <enumeration value="planetary : planets and satellites : early Mars"></enumeration>
					  <enumeration value="planetary : planets and satellites : formation"></enumeration>
					  <enumeration value="planetary : planets and satellites : giant planet"></enumeration>
					  <enumeration value="planetary : planets and satellites : habitable planets"></enumeration>
					  <enumeration value="planetary : planets and satellites : icy moon"></enumeration>
					  <enumeration value="planetary : planets and satellites : magnetic fields"></enumeration>
					  <enumeration value="planetary : planets and satellites : microgravity"></enumeration>
					  <enumeration value="planetary : planets and satellites : planet core"></enumeration>
					  <enumeration value="planetary : planets and satellites : planetary environments"></enumeration>
					  <enumeration value="planetary : planets and satellites : planetary evolution"></enumeration>
					  <enumeration value="planetary : planets and satellites : rocky planets"></enumeration>
					  <enumeration value="planetary : planets and satellites : satellites"></enumeration>
					  <enumeration value="planetary : planets and satellites : super-Earths"></enumeration>
					  <enumeration value="planetary : planets and satellites : terraforming"></enumeration>
					  <enumeration value="planetary : planets and satellites : terrestrial planet"></enumeration>
					  <enumeration value="planetary : planets and satellites : planets and satellites (general)"></enumeration>
					  <enumeration value="planetary : volcanism : andesite"></enumeration>
					  <enumeration value="planetary : volcanism : basalt"></enumeration>
					  <enumeration value="planetary : volcanism : basaltic glass"></enumeration>
					  <enumeration value="planetary : volcanism : cinder cones"></enumeration>
					  <enumeration value="planetary : volcanism : dacite"></enumeration>
					  <enumeration value="planetary : volcanism : peridotite"></enumeration>
					  <enumeration value="planetary : volcanism : pumice"></enumeration>
					  <enumeration value="planetary : volcanism : volcanism (general)"></enumeration>
					  <enumeration value="process : process - biological : DNA replication"></enumeration>
					  <enumeration value="process : process - biological : anhydrobiosis"></enumeration>
					  <enumeration value="process : process - biological : biogenicity"></enumeration>
					  <enumeration value="process : process - biological : bioleaching"></enumeration>
					  <enumeration value="process : process - biological : bioluminescence"></enumeration>
					  <enumeration value="process : process - biological : carbon fixation"></enumeration>
					  <enumeration value="process : process - biological : cell reproduction"></enumeration>
					  <enumeration value="process : process - biological : cell signalling"></enumeration>
					  <enumeration value="process : process - biological : endosymbiosis"></enumeration>
					  <enumeration value="process : process - biological : energy transduction"></enumeration>
					  <enumeration value="process : process - biological : evolution : _in vitro_ selection"></enumeration>
					  <enumeration value="process : process - biological : evolution : Darwinian evolution"></enumeration>
					  <enumeration value="process : process - biological : evolution : GADV hypothesis"></enumeration>
					  <enumeration value="process : process - biological : evolution : autopoiesis"></enumeration>
					  <enumeration value="process : process - biological : evolution : biochemical evolution"></enumeration>
					  <enumeration value="process : process - biological : evolution : biological energy quantum (BEQ)"></enumeration>
					  <enumeration value="process : process - biological : evolution : cenancestor"></enumeration>
					  <enumeration value="process : process - biological : evolution : coevolution"></enumeration>
					  <enumeration value="process : process - biological : evolution : definition of life"></enumeration>
					  <enumeration value="process : process - biological : evolution : endosymbiosis"></enumeration>
					  <enumeration value="process : process - biological : evolution : extinction"></enumeration>
					  <enumeration value="process : process - biological : evolution : genomes"></enumeration>
					  <enumeration value="process : process - biological : evolution : membrane evolution"></enumeration>
					  <enumeration value="process : process - biological : evolution : natural selection"></enumeration>
					  <enumeration value="process : process - biological : evolution : phylogeny"></enumeration>
					  <enumeration value="process : process - biological : evolution : pioneer organism"></enumeration>
					  <enumeration value="process : process - biological : evolution : recombination"></enumeration>
					  <enumeration value="process : process - biological : evolution : evolution (general)"></enumeration>
					  <enumeration value="process : process - biological : gene expression"></enumeration>
					  <enumeration value="process : process - biological : genetic code"></enumeration>
					  <enumeration value="process : process - biological : hypercycles"></enumeration>
					  <enumeration value="process : process - biological : life cycle"></enumeration>
					  <enumeration value="process : process - biological : methane oxidation"></enumeration>
					  <enumeration value="process : process - biological : molecular evolution"></enumeration>
					  <enumeration value="process : process - biological : nitrogen fixation"></enumeration>
					  <enumeration value="process : process - biological : oligomerization"></enumeration>
					  <enumeration value="process : process - biological : oscillating biochemical reaction"></enumeration>
					  <enumeration value="process : process - biological : peptide synthesis"></enumeration>
					  <enumeration value="process : process - biological : phosphorylation"></enumeration>
					  <enumeration value="process : process - biological : photochemistry"></enumeration>
					  <enumeration value="process : process - biological : proton pump"></enumeration>
					  <enumeration value="process : process - biological : recombination"></enumeration>
					  <enumeration value="process : process - biological : redox reactions"></enumeration>
					  <enumeration value="process : process - biological : replication"></enumeration>
					  <enumeration value="process : process - biological : self-assembly"></enumeration>
					  <enumeration value="process : process - biological : self-replication"></enumeration>
					  <enumeration value="process : process - biological : symbiosis"></enumeration>
					  <enumeration value="process : process - biological : translation"></enumeration>
					  <enumeration value="process : process - biological : process - biological (general)"></enumeration>
					  <enumeration value="process : process - chemical : abiogenesis"></enumeration>
					  <enumeration value="process : process - chemical : abiotic synthesis"></enumeration>
					  <enumeration value="process : process - chemical : aldol reaction"></enumeration>
					  <enumeration value="process : process - chemical : alkyne oxidation"></enumeration>
					  <enumeration value="process : process - chemical : aqueous alteration"></enumeration>
					  <enumeration value="process : process - chemical : asymmetric autocatalysis"></enumeration>
					  <enumeration value="process : process - chemical : asymmetric synthesis"></enumeration>
					  <enumeration value="process : process - chemical : autocatalysis"></enumeration>
					  <enumeration value="process : process - chemical : catalysis : autocatalysis"></enumeration>
					  <enumeration value="process : process - chemical : catalysis : autocatalytic network"></enumeration>
					  <enumeration value="process : process - chemical : catalysis : cofactor"></enumeration>
					  <enumeration value="process : process - chemical : catalysis : enzymes : RuBisCo"></enumeration>
					  <enumeration value="process : process - chemical : catalysis : enzymes : aldolase"></enumeration>
					  <enumeration value="process : process - chemical : catalysis : enzymes : aminoacyl-tRNA synthetase"></enumeration>
					  <enumeration value="process : process - chemical : catalysis : enzymes : disulfide reductases"></enumeration>
					  <enumeration value="process : process - chemical : catalysis : enzymes : hydrogenase"></enumeration>
					  <enumeration value="process : process - chemical : catalysis : enzymes : manganese superoxide dismutase"></enumeration>
					  <enumeration value="process : process - chemical : catalysis : enzymes : methyl-coenzyme M reductase"></enumeration>
					  <enumeration value="process : process - chemical : catalysis : enzymes : nitrogenase"></enumeration>
					  <enumeration value="process : process - chemical : catalysis : enzymes : ribozymes"></enumeration>
					  <enumeration value="process : process - chemical : catalysis : enzymes : enzymes (general)"></enumeration>
					  <enumeration value="process : process - chemical : catalysis : montmorillonite catalysis"></enumeration>
					  <enumeration value="process : process - chemical : catalysis : catalysis (general)"></enumeration>
					  <enumeration value="process : process - chemical : cell signalling"></enumeration>
					  <enumeration value="process : process - chemical : chemical evolution"></enumeration>
					  <enumeration value="process : process - chemical : coacervation"></enumeration>
					  <enumeration value="process : process - chemical : copolymerization"></enumeration>
					  <enumeration value="process : process - chemical : epimerization"></enumeration>
					  <enumeration value="process : process - chemical : evolution : _in vitro_ selection"></enumeration>
					  <enumeration value="process : process - chemical : evolution : Darwinian evolution"></enumeration>
					  <enumeration value="process : process - chemical : evolution : GADV hypothesis"></enumeration>
					  <enumeration value="process : process - chemical : evolution : autopoiesis"></enumeration>
					  <enumeration value="process : process - chemical : evolution : biochemical evolution"></enumeration>
					  <enumeration value="process : process - chemical : evolution : biological energy quantum (BEQ)"></enumeration>
					  <enumeration value="process : process - chemical : evolution : cenancestor"></enumeration>
					  <enumeration value="process : process - chemical : evolution : coevolution"></enumeration>
					  <enumeration value="process : process - chemical : evolution : definition of life"></enumeration>
					  <enumeration value="process : process - chemical : evolution : endosymbiosis"></enumeration>
					  <enumeration value="process : process - chemical : evolution : extinction"></enumeration>
					  <enumeration value="process : process - chemical : evolution : genomes"></enumeration>
					  <enumeration value="process : process - chemical : evolution : membrane evolution"></enumeration>
					  <enumeration value="process : process - chemical : evolution : natural selection"></enumeration>
					  <enumeration value="process : process - chemical : evolution : phylogeny"></enumeration>
					  <enumeration value="process : process - chemical : evolution : pioneer organism"></enumeration>
					  <enumeration value="process : process - chemical : evolution : recombination"></enumeration>
					  <enumeration value="process : process - chemical : evolution : evolution (general)"></enumeration>
					  <enumeration value="process : process - chemical : fenton oxidation"></enumeration>
					  <enumeration value="process : process - chemical : fluorescence"></enumeration>
					  <enumeration value="process : process - chemical : formose reaction"></enumeration>
					  <enumeration value="process : process - chemical : geothermal"></enumeration>
					  <enumeration value="process : process - chemical : hydrolysis"></enumeration>
					  <enumeration value="process : process - chemical : irradiation"></enumeration>
					  <enumeration value="process : process - chemical : methane oxidation"></enumeration>
					  <enumeration value="process : process - chemical : molecular evolution"></enumeration>
					  <enumeration value="process : process - chemical : montmorillonite catalysis"></enumeration>
					  <enumeration value="process : process - chemical : nitrogen fixation"></enumeration>
					  <enumeration value="process : process - chemical : nuclear reactions"></enumeration>
					  <enumeration value="process : process - chemical : oxidation"></enumeration>
					  <enumeration value="process : process - chemical : oxidation state"></enumeration>
					  <enumeration value="process : process - chemical : oxidation-reduction potential"></enumeration>
					  <enumeration value="process : process - chemical : photochemistry"></enumeration>
					  <enumeration value="process : process - chemical : photolysis"></enumeration>
					  <enumeration value="process : process - chemical : polymerase chain reaction (PCR)"></enumeration>
					  <enumeration value="process : process - chemical : polymerization"></enumeration>
					  <enumeration value="process : process - chemical : radiolysis"></enumeration>
					  <enumeration value="process : process - chemical : reaction networks"></enumeration>
					  <enumeration value="process : process - chemical : redox reactions"></enumeration>
					  <enumeration value="process : process - chemical : solar photochemistry"></enumeration>
					  <enumeration value="process : process - chemical : sorption"></enumeration>
					  <enumeration value="process : process - chemical : xeropreservation"></enumeration>
					  <enumeration value="process : process - chemical : process - chemical (general)"></enumeration>
					  <enumeration value="process : process - geological : biomineralization"></enumeration>
					  <enumeration value="process : process - geological : diagenesis"></enumeration>
					  <enumeration value="process : process - geological : metamorphism"></enumeration>
					  <enumeration value="process : process - geological : orogenesis"></enumeration>
					  <enumeration value="process : process - geological : rifting"></enumeration>
					  <enumeration value="process : process - geological : rock cycle"></enumeration>
					  <enumeration value="process : process - geological : sea floor spreading"></enumeration>
					  <enumeration value="process : process - geological : sedimentation"></enumeration>
					  <enumeration value="process : process - geological : subduction"></enumeration>
					  <enumeration value="process : process - geological : tectonics"></enumeration>
					  <enumeration value="process : process - geological : weathering"></enumeration>
					  <enumeration value="process : process - geological : process - geological (general)"></enumeration>
					  <enumeration value="process : process - interstellar : astrochemical evolution"></enumeration>
					  <enumeration value="process : process - interstellar : dust grains"></enumeration>
					  <enumeration value="process : process - interstellar : molecular cloud formation"></enumeration>
					  <enumeration value="process : process - interstellar : polycyclic aromatic hydrocarbons (PAH)"></enumeration>
					  <enumeration value="process : process - interstellar : protostar formation"></enumeration>
					  <enumeration value="process : process - interstellar : radiative transfer"></enumeration>
					  <enumeration value="process : process - interstellar : process - interstellar (general)"></enumeration>
					  <enumeration value="process : process - physical : irradiation"></enumeration>
					  <enumeration value="process : process - physical : nuclear reactions"></enumeration>
					  <enumeration value="process : process - physical : polarization : circular polarization"></enumeration>
					  <enumeration value="process : process - physical : polarization : linear polarization"></enumeration>
					  <enumeration value="process : process - physical : polarization : optical activity"></enumeration>
					  <enumeration value="process : process - physical : polarization : polarization (general)"></enumeration>
					  <enumeration value="process : process - physical : radiation : _Deinococcus radiodurans_"></enumeration>
					  <enumeration value="process : process - physical : radiation : albedo"></enumeration>
					  <enumeration value="process : process - physical : radiation : cosmic ray"></enumeration>
					  <enumeration value="process : process - physical : radiation : disk-averaged spectra"></enumeration>
					  <enumeration value="process : process - physical : radiation : energetic particles"></enumeration>
					  <enumeration value="process : process - physical : radiation : energy"></enumeration>
					  <enumeration value="process : process - physical : radiation : gamma ray bursts"></enumeration>
					  <enumeration value="process : process - physical : radiation : infrared"></enumeration>
					  <enumeration value="process : process - physical : radiation : ionizing radiation"></enumeration>
					  <enumeration value="process : process - physical : radiation : maser radiation"></enumeration>
					  <enumeration value="process : process - physical : radiation : radiation resistance"></enumeration>
					  <enumeration value="process : process - physical : radiation : radiolysis"></enumeration>
					  <enumeration value="process : process - physical : radiation : solar flux"></enumeration>
					  <enumeration value="process : process - physical : radiation : space radiation"></enumeration>
					  <enumeration value="process : process - physical : radiation : ultraviolet (UV)"></enumeration>
					  <enumeration value="process : process - physical : radiation : radiation (general)"></enumeration>
					  <enumeration value="process : process - physical : process - physical (general)"></enumeration>
					  <enumeration value="process : process - planetary : accretion"></enumeration>
					  <enumeration value="process : process - planetary : aurorae"></enumeration>
					  <enumeration value="process : process - planetary : hydrologic cycle"></enumeration>
					  <enumeration value="process : process - planetary : orogenesis"></enumeration>
					  <enumeration value="process : process - planetary : protoplanetary disks"></enumeration>
					  <enumeration value="process : process - planetary : rock cycle"></enumeration>
					  <enumeration value="process : process - planetary : sedimentation"></enumeration>
					  <enumeration value="process : process - planetary : tectonics"></enumeration>
					  <enumeration value="process : process - planetary : troposphere"></enumeration>
					  <enumeration value="process : process - planetary : volcanism : andesite"></enumeration>
					  <enumeration value="process : process - planetary : volcanism : basalt"></enumeration>
					  <enumeration value="process : process - planetary : volcanism : basaltic glass"></enumeration>
					  <enumeration value="process : process - planetary : volcanism : cinder cones"></enumeration>
					  <enumeration value="process : process - planetary : volcanism : dacite"></enumeration>
					  <enumeration value="process : process - planetary : volcanism : peridotite"></enumeration>
					  <enumeration value="process : process - planetary : volcanism : pumice"></enumeration>
					  <enumeration value="process : process - planetary : volcanism : volcanism (general)"></enumeration>
					  <enumeration value="process : process - planetary : process - planetary (general)"></enumeration>
					  <enumeration value="process : process - stellar : accretion"></enumeration>
					  <enumeration value="process : process - stellar : active stars"></enumeration>
					  <enumeration value="process : process - stellar : helium burning"></enumeration>
					  <enumeration value="process : process - stellar : hydrogen burning"></enumeration>
					  <enumeration value="process : process - stellar : nucleosynthesis"></enumeration>
					  <enumeration value="process : process - stellar : supernova"></enumeration>
					  <enumeration value="process : process - stellar : young stellar objects"></enumeration>
					  <enumeration value="process : process - stellar : process - stellar (general)"></enumeration>
					</restriction>
				</simpleType>
			</element>
			<element name="FreeKeyword" type="string" maxOccurs="unbounded" minOccurs="1"/>
		</choice>
	</complexType>

	<complexType name="FundingSourceType">
		<choice minOccurs="1" maxOccurs="unbounded">
			<element name="ControlledFundingSource"  maxOccurs="unbounded" minOccurs="1">
				<simpleType>
					<restriction base="string">
						<enumeration value="Government : Foreign : CSA (Canada)"/>
						<enumeration value="Government : Foreign : ESA (EU)"/>
						<enumeration value="Government : Foreign : JAXA (Japan)"/>
						<enumeration value="Government : Foreign : NSERC (Canada)"/>
						<enumeration value="Government : Foreign : other"/>
						<enumeration value="Government : US : DOD"/>
						<enumeration value="Government : US : DOE"/>
						<enumeration value="Government : US : NASA : Directed : ISFM"/>
						<enumeration value="Government : US : NASA : Directed : SERA"/>
						<enumeration value="Government : US : NASA : Directed : other"/>
						<enumeration value="Government : US : NASA : Grant : NAI : CAN"/>
						<enumeration value="Government : US : NASA : Grant : NAI : DDF"/>
						<enumeration value="Government : US : NASA : Grant : NAI : MIRS"/>
						<enumeration value="Government : US : NASA : Grant : NAI : other"/>
						<enumeration value="Government : US : NASA : Grant : NExSS"/>
						<enumeration value="Government : US : NASA : Grant : NPP"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : APRA"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : ASTEP"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : CDAP"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : DALI"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : EW"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : EXO"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : FINESST"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : HW"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : ICAR"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : ICEE2"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : LARS"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : MDAP"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : MatISSE"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : NFDAP"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : PDAR"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : PICASSO"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : PSTAR"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : SSW"/>
						<enumeration value="Government : US : NASA : Grant : ROSES : other"/>
						<enumeration value="Government : US : NASA : Grant : other"/>
						<enumeration value="Government : US : NASA : Internal R&amp;D : Ames ARIA"/>
						<enumeration value="Government : US : NASA : Internal R&amp;D : Ames CIF"/>
						<enumeration value="Government : US : NASA : Internal R&amp;D : Ames DDF"/>
						<enumeration value="Government : US : NASA : Internal R&amp;D : Ames IRAD"/>
						<enumeration value="Government : US : NASA : Internal R&amp;D : Goddard"/>
						<enumeration value="Government : US : NASA : Internal R&amp;D : JSC"/>
						<enumeration value="Government : US : NASA : Internal R&amp;D : KSC"/>
						<enumeration value="Government : US : NASA : Internal R&amp;D : other"/>
						<enumeration value="Government : US : NASA : other"/>
						<enumeration value="Government : US : NIH"/>
						<enumeration value="Government : US : NOAA"/>
						<enumeration value="Government : US : NSF"/>
						<enumeration value="Government : US : USGS"/>
						<enumeration value="Government : US : other"/>
						<enumeration value="Private : Agouron Instititute"/>
						<enumeration value="Private : Internal Institutional funding"/>
						<enumeration value="Private : Keck Foundation"/>
						<enumeration value="Private : Moore Foundation"/>
						<enumeration value="Private : National Geographic Society"/>
						<enumeration value="Private : Simons Foundation"/>
						<enumeration value="Private : Sloan Foundation"/>
						<enumeration value="Private : Templeton Foundation"/>
						<enumeration value="Private : other"/>
					</restriction>
				</simpleType>
			</element>
			<element name="FreeFundingSource" type="string" maxOccurs="unbounded" minOccurs="1"/>
		</choice>
	</complexType>
	
	<complexType name="FieldCollectionLocationType">
		<sequence>
			<element name="SiteName" type="string" minOccurs="1"  maxOccurs="1">
				<annotation>
					<documentation>Name of the location at the field site.</documentation>
				</annotation>
			</element>
			<element name="SiteLatitude" type="decimal" minOccurs="0" maxOccurs="1">
				<annotation>
					<documentation>Latitude of the location where the sample was collected (Coordinate system: WGS84).</documentation>
				</annotation>
			</element>
			<element name="SiteLongitude" type="decimal" minOccurs="0" maxOccurs="1">
				<annotation>
					<documentation>Longitude of the location where the sample was collected (Coordinate system: WGS84).</documentation>
				</annotation>
			</element>
		</sequence>
	</complexType>


	<complexType name="MissionOrProjectType">
		<choice>
			<element name="ControlledMissionOrProject" maxOccurs="1" minOccurs="1">
				<simpleType>
					<restriction base="string">
						<enumeration
						    value="N/A"/>
						<enumeration
						    value="mission : Atacama Large Millimeter/submillimeter Array (ALMA)"/>
						<enumeration
						    value="mission : Cassini-Huygens"/>
						<enumeration
						    value="mission : Chandra X-Ray Observatory"/>
						<enumeration
						    value="mission : ExoMars"/>
						<enumeration
						    value="mission : Gemini Observatory"/>
						<enumeration
						    value="mission : Hubble Space Telescope"/>
						<enumeration
						    value="mission : James Webb Space Telescope (JWST)"/>
						<enumeration
						    value="mission : Juno"/>
						<enumeration
						    value="mission : Kepler"/>
						<enumeration
						    value="mission : Mars 2020"/>
						<enumeration
						    value="mission : Mars Atmosphere and Volatile Evolution (MAVEN)"/>
						<enumeration
						    value="mission : Mars Exploration Rovers"/>
						<enumeration
						    value="mission : Mars Odyssey"/>
						<enumeration
						    value="mission : Mars Reconnaisance Orbiter (MRO)"/>
						<enumeration
						    value="mission : Mars Science Laboratory (MSL)"/>
						<enumeration
						    value="mission : New Horizons"/>
						<enumeration
						    value="mission : Origins, Spectral Interpretation, Resource Identification, Security, Regolith Explorer (OSIRIS-REx)"/>
						<enumeration
						    value="mission : Other"/>
						<enumeration
						    value="mission : Spitzer Space Telescope"/>
						<enumeration
						    value="mission : Stratospheric Observatory for Infra-Red Astronomy (SOFIA)"/>
						<enumeration
						    value="mission : Voyager 2"/>
						<enumeration
						    value="project : Astrobiology Science and Technology for Exploring Planets (ASTEP) Program : Pavilion Lake Research Project"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-1 : Arizona State University: Origin, Evolution, and Distribution of LIfe in the Solar System"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-1 : Carnegie Institution of Washington: Physical, Chemical, and Biological Evolution and Cosmic Environmetns"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-1 : Harvard University: Planetary Context of Biological Evolution"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-1 : Jet Propulsion Laboratory: Definition and Detection of Biosignatures"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-1 : Johnson Space Center: Center for Study of Biomarkers in Astromaterials"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-1 : Marine Biological Laboratory: Environmental Genomes and Evolution of Complex Systems in Simple Organisms"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-1 : NASA Ames Research Center: Context, Origins, Evolution and Future of Life"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-1 : Pennsylvania State University"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-1 : Scripps Research Institute"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-1 : University of California, Los Angeles"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-1 : University of Colorado, Boulder: Origins of Stars and Planets"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-2 : Michigan State University"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-2 : University of Rhode Island: Subsurface Biospheres"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-2 : University of Washington: Planetary Habitability and Evolution of Biological Complexity"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-2 : Virtual Planetary Laboratory: Astronomical Detection of Biosignatures From Extrasolar Planets"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-3 : Carnegie Institution of Washington: Astrobiological Pathways"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-3 : Indiana University: Detection of Biosustainable Energy and Nutrient Cycling in the Deep Subsurface of Earth and Mars"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-3 : Marine Biological Laboratory: Environmental Genomes and Evolution of Complex Systems in Simple Organisms"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-3 : NASA Ames Research Center"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-3 : NASA Goddard Space Flight Center"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-3 : Pennsylvania State University: Evolution of a Habitable Planet"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-3 : SETI Institute: Planetary Biology, Evolution and Intelligence"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-3 : University of Arizona: An Astronomical Search for the Essential Ingredients for Life: Placing Our Habitable System in Context"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-3 : University of California, Berkeley: BIOspheres of Mars: Ancient and Recent Studies"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-3 : University of California, Los Angeles"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-3 : University of Colorado, Boulder"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-3 : University of Hawaii, Manoa: The Origin, History, and Distribution of Water and Its Relation to Life in the Universe"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-4 : Massachusetts Institute of Technology"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-4 : Montana State University"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-4 : University of Wisconsin"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-4 : VPL @ University of Washington: Exploring the Habitability and Biosignatures of Extrasolar Terrestrial Planets"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-5 : Arizona State University: Follow the Elements"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-5 : Carnegie Institution of Washington: Astrobiological Pathways"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-5 : Georgia Institute of Technology: The Georgia Tech Center for Ribosome Adaptation and Evolution"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-5 : Jet Propulsion Laboratory - Icy Worlds: Astrobiology of Icy Worlds: Habitability, Survivability, and Detectability"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-5 : Jet Propulsion Laboratory - Titan: Titan as a Prebiotic Chemical System"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-5 : NASA Ames Research Center: Early Habitable Environments and the Evolution of Complexity"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-5 : NASA Goddard Space Flight Center: Origin and Evolution of Organics in Planetary Systems"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-5 : Pennsylvania State University: Signatures of Life From Earth and Beyond"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-5 : Rensselaer Polytechnic Institute: Setting the Stage for Life: From Interstellar Clouds to Early Earth and Mars"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-5 : University of Hawaii: The Origin, History, and Distribution of Water and Its Relation to Life in the Universe"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-6 : Massachusetts Institute of Technology: Foundations of Complex Life: Evolution, Preservation and Detection on Earth and Beyond"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-6 : University of Illinois at Urbana-Champaign: Towards Universal Biology: Constraints From Early and Continuing Evolutionary Dynamics of Life on Earth"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-6 : University of Southern California: Life Underground"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-6 : University of Wisconsin: Habitability, Life Detection, and the Signatures of Life on the Terrestrial Planets"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-6 : VPL @ University of Washington: The Virtual Planetary Laboratory"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-7 : Georgia Institute of Technology: Reliving the History of Life: Experimental Evolution of Major Transitions"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-7 : NASA Ames Research Center: The Evolution of Prebiotic Chemical Complexity and the Organic Inventory of Protoplanetary Disks and Primordial Planets"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-7 : NASA Goddard Spaceflight Center: Origin and Evolution of Organics and Water in Planetary Systems"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-7 : NASA Jet Propulsion Laboratory: Icy Worlds: Astrobiology at the Water-Rock Interface and Beyond"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-7 : SETI Institute: Changing Planetary Environments and the Fingerprints of Life"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-7 : University of California, Riverside: Alternative Earths: Explaining Persistent Inhabitation on a Dynamic Early Earth"/>
						<enumeration
						    value="project : NASA Astrobiology Institute : NAI-CAN-7 : University of Colorado, Boulder: Rock-Powered Life: Revealing Mechanisms of Energy Flow From the Lithosphere to the Biosphere"/>
						<enumeration
						    value="project : NASA Astrobiology Research Program"/>
						<enumeration
						    value="project : Other"/>
						<enumeration
						    value="project : Research Coordination Networks (RCN) : From Early Cells to Multicellularity"/>
						<enumeration
						    value="project : Research Coordination Networks (RCN) : Network for Life Detection (NfoLD)"/>
						<enumeration
						    value="project : Research Coordination Networks (RCN) : Ocean Worlds (Habitable Worlds)"/>
						<enumeration
						    value="project : Research Coordination Networks (RCN) : Prebiotic Chemistry and the Early Earth"/>
					</restriction>
				</simpleType>
			</element>
			<element name="FreeMissionOrProject" type="string" maxOccurs="1" minOccurs="1"/>
		</choice>
	</complexType>

	<complexType name="DisciplineType">
		<choice>
			<element name="ControlledDiscipline" maxOccurs="unbounded" minOccurs="1">
				<simpleType>
					<restriction base="string">
						<enumeration value="aerobiology"/>
						<enumeration value="astrobiology"/>
						<enumeration value="astrochemistry"/>
						<enumeration value="astronomy"/>
						<enumeration value="astrophysics"/>
						<enumeration value="atmospheric science"/>
						<enumeration value="biochemistry"/>
						<enumeration value="biogeochemistry"/>
						<enumeration value="bioinformatics"/>
						<enumeration value="biological oceanography"/>
						<enumeration value="biology"/>
						<enumeration value="biomineralogy"/>
						<enumeration value="cellular biology"/>
						<enumeration value="chemical oceanography"/>
						<enumeration value="chemistry"/>
						<enumeration value="climatology"/>
						<enumeration value="constructive biology"/>
						<enumeration value="cosmobiology"/>
						<enumeration value="cosmochemistry"/>
						<enumeration value="cosmology"/>
						<enumeration value="crystallography"/>
						<enumeration value="ecology"/>
						<enumeration value="education"/>
						<enumeration value="ethics"/>
						<enumeration value="evolutionary biology"/>
						<enumeration value="exobiology"/>
						<enumeration value="genomics"/>
						<enumeration value="geobiology"/>
						<enumeration value="geochemistry"/>
						<enumeration value="geochronology"/>
						<enumeration value="geology"/>
						<enumeration value="geophysics"/>
						<enumeration value="heliophysics"/>
						<enumeration value="hydrology"/>
						<enumeration value="limnology"/>
						<enumeration value="microbial ecology"/>
						<enumeration value="microbiology"/>
						<enumeration value="mineralogy"/>
						<enumeration value="molecular biology"/>
						<enumeration value="organic geochemistry"/>
						<enumeration value="paleobiochemistry"/>
						<enumeration value="paleontology"/>
						<enumeration value="paleobiology"/>
						<enumeration value="paleoceanography"/>
						<enumeration value="paleoclimatology"/>
						<enumeration value="paleoecology"/>
						<enumeration value="paleogenetics"/>
						<enumeration value="phycology"/>
						<enumeration value="phylogenomics"/>
						<enumeration value="physical chemistry"/>
						<enumeration value="physical oceanograohy"/>
						<enumeration value="planetary geology"/>
						<enumeration value="planetary science"/>
						<enumeration value="radiation physics"/>
						<enumeration value="sedimentology"/>
						<enumeration value="speleology"/>
						<enumeration value="spectroscopy"/>
						<enumeration value="taphonomy"/>
						<enumeration value="thermodynamics"/>
						<enumeration value="virology"/>
						<enumeration value="theology"/>
					</restriction>
				</simpleType>
			</element>
			<element name="FreeDiscipline" type="string" maxOccurs="unbounded" minOccurs="1"/>
		</choice>
	</complexType>
</schema>
