Darwin Core quick reference guide

This page provides a list of all currently recommended terms of the Darwin Core standard. Categories such as Occurrence or Event correspond to Darwin Core classes which group other terms. Convenient files of these terms and their full history can be found in the Darwin Core repository.

Record-level

typeProperty
Identifierhttp://purl.org/dc/terms/type
DefinitionThe nature or genre of the resource.
CommentsFor Darwin Core, recommended best practice is to use the name of the class that defines the root of the record. Examples: StillImage, MovingImage, Sound, PhysicalObject, Event, Text. For discussion see http://terms.tdwg.org/wiki/dcterms:type.

modifiedProperty
Identifierhttp://purl.org/dc/terms/modified
DefinitionThe most recent date-time on which the resource was changed.
CommentsFor Darwin Core, recommended best practice is to use an encoding scheme, such as ISO 8601:2004(E). Examples: 1963-03-08T14:07-0600 is 8 Mar 1963 2:07pm in the time zone six hours earlier than UTC, 2009-02-20T08:40Z is 20 Feb 2009 8:40am UTC, 1809-02-12 is 12 Feb 1809, 1906-06 is Jun 1906, 1971 is just that year, 2007-03-01T13:00:00Z/2008-05-11T15:30:00Z is the interval between 1 Mar 2007 1pm UTC and 11 May 2008 3:30pm UTC, 2007-11-13/15 is the interval between 13 Nov 2007 and 15 Nov 2007. For discussion see http://terms.tdwg.org/wiki/dwc:modified.

languageProperty
Identifierhttp://purl.org/dc/terms/language
DefinitionA language of the resource.
CommentsRecommended best practice is to use a controlled vocabulary such as RFC 5646. Examples: en for English, es for Spanish. For discussion see http://terms.tdwg.org/wiki/dcterms:language.

licenseProperty
Identifierhttp://purl.org/dc/terms/license
DefinitionA legal document giving official permission to do something with the resource.
CommentsExamples: http://creativecommons.org/publicdomain/zero/1.0/legalcode, http://creativecommons.org/licenses/by/4.0/legalcode. For discussion see http://terms.tdwg.org/wiki/dcterms:license.

rightsHolderProperty
Identifierhttp://purl.org/dc/terms/rightsHolder
DefinitionA person or organization owning or managing rights over the resource.
CommentsExample: The Regents of the University of California. For discussion see http://terms.tdwg.org/wiki/dcterms:rightsHolder.

accessRightsProperty
Identifierhttp://purl.org/dc/terms/accessRights
DefinitionInformation about who can access the resource or an indication of its security status. Access Rights may include information regarding access or restrictions based on privacy, security, or other policies.
CommentsExample: not-for-profit use only. For discussion see http://terms.tdwg.org/wiki/dcterms:accessRights.

bibliographicCitationProperty
Identifierhttp://purl.org/dc/terms/bibliographicCitation
DefinitionA bibliographic reference for the resource as a statement indicating how this record should be cited (attributed) when used.
CommentsRecommended practice is to include sufficient bibliographic detail to identify the resource as unambiguously as possible. Examples: Ctenomys sociabilis (MVZ 165861) for a specimen, Oliver P. Pearson. 1985. Los tuco-tucos (genera Ctenomys) de los Parques Nacionales Lanin y Nahuel Huapi, Argentina Historia Natural, 5(37):337-343. for a Taxon. For discussion see http://terms.tdwg.org/wiki/dcterms:bibliographicCitation.

referencesProperty
Identifierhttp://purl.org/dc/terms/references
DefinitionA related resource that is referenced, cited, or otherwise pointed to by the described resource.
CommentsExamples: http://mvzarctos.berkeley.edu/guid/MVZ:Mamm:165861, http://www.catalogueoflife.org/annual-checklist/show_species_details.php?record_id=6197868. For discussion see http://terms.tdwg.org/wiki/dcterms:references.

institutionIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/institutionID
DefinitionAn identifier for the institution having custody of the object(s) or information referred to in the record.
CommentsFor physical specimens, the recommended best practice is to use an identifier from a collections registry such as the Global Registry of Biodiversity Repositories (http://grbio.org/). Examples: http://biocol.org/urn:lsid:biocol.org:col:34777, http://grbio.org/cool/km06-gtbn. For discussion see http://terms.tdwg.org/wiki/dwc:institutionID.

collectionIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/collectionID
DefinitionAn identifier for the collection or dataset from which the record was derived.
CommentsFor physical specimens, the recommended best practice is to use an identifier from a collections registry such as the Global Registry of Biodiversity Repositories (http://grbio.org/). Examples: http://biocol.org/urn:lsid:biocol.org:col:1001, http://grbio.org/cool/p5fp-c036. For discussion see http://terms.tdwg.org/wiki/dwc:collectionID.

datasetIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/datasetID
DefinitionAn identifier for the set of data. May be a global unique identifier or an identifier specific to a collection or institution.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:datasetID.

institutionCodeProperty
Identifierhttp://rs.tdwg.org/dwc/terms/institutionCode
DefinitionThe name (or acronym) in use by the institution having custody of the object(s) or information referred to in the record.
CommentsExamples: MVZ, FMNH, AKN-CLO, University of California Museum of Paleontology (UCMP). For discussion see http://terms.tdwg.org/wiki/dwc:institutionCode.

collectionCodeProperty
Identifierhttp://rs.tdwg.org/dwc/terms/collectionCode
DefinitionThe name, acronym, coden, or initialism identifying the collection or data set from which the record was derived.
CommentsExamples: Mammals, Hildebrandt, eBird. For discussion see http://terms.tdwg.org/wiki/dwc:collectionCode.

datasetNameProperty
Identifierhttp://rs.tdwg.org/dwc/terms/datasetName
DefinitionThe name identifying the data set from which the record was derived.
CommentsExamples: Grinnell Resurvey Mammals, Lacey Ctenomys Recaptures. For discussion see http://terms.tdwg.org/wiki/dwc:datasetName.

ownerInstitutionCodeProperty
Identifierhttp://rs.tdwg.org/dwc/terms/ownerInstitutionCode
DefinitionThe name (or acronym) in use by the institution having ownership of the object(s) or information referred to in the record.
CommentsExamples: NPS, APN, InBio. For discussion see http://terms.tdwg.org/wiki/dwc:ownerInstitutionCode.

basisOfRecordProperty
Identifierhttp://rs.tdwg.org/dwc/terms/basisOfRecord
DefinitionThe specific nature of the data record.
CommentsRecommended best practice is to use a controlled vocabulary such as the list of Darwin Core classes. Examples: PreservedSpecimen, FossilSpecimen, LivingSpecimen, HumanObservation, MachineObservation. For discussion see http://terms.tdwg.org/wiki/dwc:basisOfRecord.

informationWithheldProperty
Identifierhttp://rs.tdwg.org/dwc/terms/informationWithheld
DefinitionAdditional information that exists, but that has not been shared in the given record.
CommentsExamples: location information not given for endangered species, collector identities withheld, ask about tissue samples. For discussion see http://terms.tdwg.org/wiki/dwc:informationWithheld.

dataGeneralizationsProperty
Identifierhttp://rs.tdwg.org/dwc/terms/dataGeneralizations
DefinitionActions taken to make the shared data less specific or complete than in its original form. Suggests that alternative data of higher quality may be available on request.
CommentsExample: Coordinates generalized from original GPS coordinates to the nearest half degree grid cell. For discussion see http://terms.tdwg.org/wiki/dwc:dataGeneralizations.

dynamicPropertiesProperty
Identifierhttp://rs.tdwg.org/dwc/terms/dynamicProperties
DefinitionA list of additional measurements, facts, characteristics, or assertions about the record. Meant to provide a mechanism for structured content.
CommentsRecommended best practice is to use a key:value encoding schema such as JSON. Examples: {"heightInMeters":1.5}, {"tragusLengthInMeters":0.014, "weightInGrams":120}, {"natureOfID":"expert identification", "identificationEvidence":"cytochrome B sequence"}, {"relativeHumidity":28, "airTemperatureInCelsius":22, "sampleSizeInKilograms":10}, {"aspectHeading":277, "slopeInDegrees":6}, {"iucnStatus":"vulnerable", "taxonDistribution":"Neuquén, Argentina"}. For discussion see http://terms.tdwg.org/wiki/dwc:dynamicProperties.

Occurrence

OccurrenceClass
Identifierhttp://rs.tdwg.org/dwc/terms/Occurrence
DefinitionAn existence of an Organism (sensu http://rs.tdwg.org/dwc/terms/Organism) at a particular place at a particular time.
CommentsExamples: A wolf pack on the shore of Kluane Lake in 1988. A virus in a plant leaf in a the New York Botanical Garden at 15:29 on 2014-10-23. A fungus in Central Park in the summer of 1929. For discussion see http://terms.tdwg.org/wiki/dwc:Occurrence.

occurrenceIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/occurrenceID
DefinitionAn identifier for the Occurrence (as opposed to a particular digital record of the occurrence). In the absence of a persistent global unique identifier, construct one from a combination of identifiers in the record that will most closely make the occurrenceID globally unique.
CommentsFor a specimen in the absence of a bona fide global unique identifier, for example, use the form: urn:catalog:[institutionCode]:[collectionCode]:[catalogNumber]. Examples: urn:lsid:nhm.ku.edu:Herps:32, urn:catalog:FMNH:Mammal:145732. For discussion see http://terms.tdwg.org/wiki/dwc:occurrenceID.

catalogNumberProperty
Identifierhttp://rs.tdwg.org/dwc/terms/catalogNumber
DefinitionAn identifier (preferably unique) for the record within the data set or collection.
CommentsExamples: 2008.1334, 145732a, 145732. For discussion see http://terms.tdwg.org/wiki/dwc:catalogNumber.

recordNumberProperty
Identifierhttp://rs.tdwg.org/dwc/terms/recordNumber
DefinitionAn identifier given to the Occurrence at the time it was recorded. Often serves as a link between field notes and an Occurrence record, such as a specimen collector's number.
CommentsExample: OPP 7101. For discussion see http://terms.tdwg.org/wiki/dwc:recordNumber.

recordedByProperty
Identifierhttp://rs.tdwg.org/dwc/terms/recordedBy
DefinitionA list (concatenated and separated) of names of people, groups, or organizations responsible for recording the original Occurrence. The primary collector or observer, especially one who applies a personal identifier (recordNumber), should be listed first.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ). The primary collector or observer, especially one who applies a personal identifier (recordNumber), should be listed first. Examples: José E. Crespo, Oliver P. Pearson | Anita K. Pearson where the value in recordNumber OPP 7101 corresponds to the number for the specimen in the field catalog (collector number) of Oliver P. Pearson. For discussion see http://terms.tdwg.org/wiki/dwc:recordedBy.

individualCountProperty
Identifierhttp://rs.tdwg.org/dwc/terms/individualCount
DefinitionThe number of individuals represented present at the time of the Occurrence.
CommentsExamples: 1, 25. For discussion see http://terms.tdwg.org/wiki/dwc:individualCount.

organismQuantityProperty
Identifierhttp://rs.tdwg.org/dwc/terms/organismQuantity
DefinitionA number or enumeration value for the quantity of organisms.
CommentsAn organismQuantity must have a corresponding organismQuantityType. Examples: 27 (organismQuantity) with individuals (organismQuantityType), 12.5 (organismQuantity) with %biomass (organismQuantityType), r (organismQuantity) with BraunBlanquetScale (organismQuantityType). For discussion see http://terms.tdwg.org/wiki/dwc:organismQuantity.

organismQuantityTypeProperty
Identifierhttp://rs.tdwg.org/dwc/terms/organismQuantityType
DefinitionThe type of quantification system used for the quantity of organisms.
CommentsAn organismQuantityType must have a corresponding organismQuantity. Examples: 27 (organismQuantity) with individuals (organismQuantityType), 12.5 (organismQuantity) with %biomass (organismQuantityType), r (organismQuantity) with BraunBlanquetScale (organismQuantityType). For discussion see http://terms.tdwg.org/wiki/dwc:organismQuantityType.

sexProperty
Identifierhttp://rs.tdwg.org/dwc/terms/sex
DefinitionThe sex of the biological individual(s) represented in the Occurrence.
CommentsRecommended best practice is to use a controlled vocabulary. Examples: female, hermaphrodite. For discussion see http://terms.tdwg.org/wiki/dwc:sex.

lifeStageProperty
Identifierhttp://rs.tdwg.org/dwc/terms/lifeStage
DefinitionThe age class or life stage of the biological individual(s) at the time the Occurrence was recorded.
CommentsRecommended best practice is to use a controlled vocabulary. Examples: egg, eft, juvenile, adult. For discussion see http://terms.tdwg.org/wiki/dwc:lifeStage.

reproductiveConditionProperty
Identifierhttp://rs.tdwg.org/dwc/terms/reproductiveCondition
DefinitionThe reproductive condition of the biological individual(s) represented in the Occurrence.
CommentsRecommended best practice is to use a controlled vocabulary. Examples: non-reproductive, pregnant, in bloom, fruit-bearing. For discussion see http://terms.tdwg.org/wiki/dwc:reproductiveCondition.

behaviorProperty
Identifierhttp://rs.tdwg.org/dwc/terms/behavior
DefinitionThe behavior shown by the subject at the time the Occurrence was recorded.
CommentsRecommended best practice is to use a controlled vocabulary. Examples: roosting, foraging, running. For discussion see http://terms.tdwg.org/wiki/dwc:behavior.

establishmentMeansProperty
Identifierhttp://rs.tdwg.org/dwc/terms/establishmentMeans
DefinitionThe process by which the biological individual(s) represented in the Occurrence became established at the location.
CommentsRecommended best practice is to use a controlled vocabulary. Examples: native, introduced, naturalised, invasive, managed. For discussion see http://terms.tdwg.org/wiki/dwc:establishmentMeans.

occurrenceStatusProperty
Identifierhttp://rs.tdwg.org/dwc/terms/occurrenceStatus
DefinitionA statement about the presence or absence of a Taxon at a Location.
CommentsRecommended best practice is to use a controlled vocabulary. Examples: present, absent. For discussion see http://terms.tdwg.org/wiki/dwc:occurrenceStatus.

preparationsProperty
Identifierhttp://rs.tdwg.org/dwc/terms/preparations
DefinitionA list (concatenated and separated) of preparations and preservation methods for a specimen.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ). Examples: fossil, cast, photograph, DNA extract, skin | skull | skeleton, whole animal (ETOH) | tissue (EDTA). For discussion see http://terms.tdwg.org/wiki/dwc:preparations.

dispositionProperty
Identifierhttp://rs.tdwg.org/dwc/terms/disposition
DefinitionThe current state of a specimen with respect to the collection identified in collectionCode or collectionID.
CommentsRecommended best practice is to use a controlled vocabulary. Examples: in collection, missing, voucher elsewhere, duplicates elsewhere. For discussion see http://terms.tdwg.org/wiki/dwc:disposition.

associatedMediaProperty
Identifierhttp://rs.tdwg.org/dwc/terms/associatedMedia
DefinitionA list (concatenated and separated) of identifiers (publication, global unique identifier, URI) of media associated with the Occurrence.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ). Examples: http://arctos.database.museum/SpecimenImages/UAMObs/Mamm/2/P7291179.JPG, http://204.140.246.24/Fish/Collection%20Pictures/10118-00.jpg | http://204.140.246.24/Fish/Collection%20Pictures/10118-00a.jpg. For discussion see http://terms.tdwg.org/wiki/dwc:associatedMedia.

associatedReferencesProperty
Identifierhttp://rs.tdwg.org/dwc/terms/associatedReferences
DefinitionA list (concatenated and separated) of identifiers (publication, bibliographic reference, global unique identifier, URI) of literature associated with the Occurrence.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ). Examples: http://www.sciencemag.org/cgi/content/abstract/322/5899/261, Christopher J. Conroy, Jennifer L. Neuwald. 2008. Phylogeographic study of the California vole, Microtus californicus Journal of Mammalogy, 89(3):755-767., Steven R. Hoofer and Ronald A. Van Den Bussche. 2001. Phylogenetic Relationships of Plecotine Bats and Allies Based on Mitochondrial Ribosomal Sequences. Journal of Mammalogy 82(1):131-137. | Walker, Faith M., Jeffrey T. Foster, Kevin P. Drees, Carol L. Chambers. 2014. Spotted bat (Euderma maculatum) microsatellite discovery using illumina sequencing. Conservation Genetics Resources.. For discussion see http://terms.tdwg.org/wiki/dwc:associatedReferences.

associatedSequencesProperty
Identifierhttp://rs.tdwg.org/dwc/terms/associatedSequences
DefinitionA list (concatenated and separated) of identifiers (publication, global unique identifier, URI) of genetic sequence information associated with the Occurrence.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ). Examples: http://www.ncbi.nlm.nih.gov/nuccore/U34853.1, http://www.ncbi.nlm.nih.gov/nuccore/GU328060 | http://www.ncbi.nlm.nih.gov/nuccore/AF326093. For discussion see http://terms.tdwg.org/wiki/dwc:associatedSequences.

associatedTaxaProperty
Identifierhttp://rs.tdwg.org/dwc/terms/associatedTaxa
DefinitionA list (concatenated and separated) of identifiers or names of taxa and their associations with the Occurrence.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ), and to separate the relationship from the taxon with a colon (:). Examples: host:Quercus alba, parasitoid of:Cyclocephala signaticollis | predator of Apis mellifera. For discussion see http://terms.tdwg.org/wiki/dwc:associatedTaxa.

otherCatalogNumbersProperty
Identifierhttp://rs.tdwg.org/dwc/terms/otherCatalogNumbers
DefinitionA list (concatenated and separated) of previous or alternate fully qualified catalog numbers or other human-used identifiers for the same Occurrence, whether in the current or any other data set or collection.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ). Examples: FMNH:Mammal:1234, NPS YELLO6778 | MBG 33424. For discussion see http://terms.tdwg.org/wiki/dwc:otherCatalogNumbers.

occurrenceRemarksProperty
Identifierhttp://rs.tdwg.org/dwc/terms/occurrenceRemarks
DefinitionComments or notes about the Occurrence.
CommentsExample: found dead on road. For discussion see http://terms.tdwg.org/wiki/dwc:occurrenceRemarks.

Organism

OrganismClass
Identifierhttp://rs.tdwg.org/dwc/terms/Organism
DefinitionA particular organism or defined group of organisms considered to be taxonomically homogeneous.
CommentsInstances of the Organism class are intended to facilitate linking of one or more Identification instances to one or more Occurrence instances. Therefore, things that are typically assigned scientific names (such as viruses, hybrids, and lichens) and aggregates whose occurrences are typically recorded (such as packs, clones, and colonies) are included in the scope of this class. For discussion see http://terms.tdwg.org/wiki/dwc:Organism.

organismIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/organismID
DefinitionAn identifier for the Organism instance (as opposed to a particular digital record of the Organism). May be a globally unique identifier or an identifier specific to the data set.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:organismID.

organismNameProperty
Identifierhttp://rs.tdwg.org/dwc/terms/organismName
DefinitionA textual name or label assigned to an Organism instance.
CommentsExamples: Huberta, Boab Prison Tree, J pod. For discussion see http://terms.tdwg.org/wiki/dwc:organismName.

organismScopeProperty
Identifierhttp://rs.tdwg.org/dwc/terms/organismScope
DefinitionA description of the kind of Organism instance. Can be used to indicate whether the Organism instance represents a discrete organism or if it represents a particular type of aggregation.
CommentsRecommended best practice is to use a controlled vocabulary. This term is not intended to be used to specify a type of taxon. To describe the kind of Organism using a URI object in RDF, use rdf:type (http://www.w3.org/1999/02/22-rdf-syntax-ns#type) instead. Examples: multicellular organism, virus, clone pack, colony. For discussion see http://terms.tdwg.org/wiki/dwc:organismScope.

associatedOccurrencesProperty
Identifierhttp://rs.tdwg.org/dwc/terms/associatedOccurrences
DefinitionA list (concatenated and separated) of identifiers of other Occurrence records and their associations to this Occurrence.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ). For discussion see http://terms.tdwg.org/wiki/dwc:associatedOccurrences.

associatedOrganismsProperty
Identifierhttp://rs.tdwg.org/dwc/terms/associatedOrganisms
DefinitionA list (concatenated and separated) of identifiers of other Organisms and their associations to this Organism.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ). Examples: sibling of MXA-232, mother of MXA-231 | mother of MXA-232. For discussion see http://terms.tdwg.org/wiki/dwc:associatedOrganisms.

previousIdentificationsProperty
Identifierhttp://rs.tdwg.org/dwc/terms/previousIdentifications
DefinitionA list (concatenated and separated) of previous assignments of names to the Organism.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ). Examples: Chalepidae, Pinus abies, Anthus sp., field ID by G. Iglesias | Anthus correndera, expert ID by C. Cicero 2009-02-12 based on morphology. For discussion see http://terms.tdwg.org/wiki/dwc:previousIdentifications.

organismRemarksProperty
Identifierhttp://rs.tdwg.org/dwc/terms/organismRemarks
DefinitionComments or notes about the Organism instance.
CommentsExample: One of a litter of six. For discussion see http://terms.tdwg.org/wiki/dwc:organismRemarks.

MaterialSample

MaterialSampleClass
Identifierhttp://rs.tdwg.org/dwc/terms/MaterialSample
DefinitionA physical results of a sampling (or subsampling) event. In biological collections, the material sample is typically collected, and either preserved or destructively processed.
CommentsExamples: A whole organism preserved in a collection. A part of an organism isolated for some purpose. A soil sample. A marine microbial sample. For discussion see http://terms.tdwg.org/wiki/dwc:MaterialSample.

materialSampleIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/materialSampleID
DefinitionAn identifier for the MaterialSample (as opposed to a particular digital record of the material sample). In the absence of a persistent global unique identifier, construct one from a combination of identifiers in the record that will most closely make the materialSampleID globally unique.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:materialSampleID.

LivingSpecimen

LivingSpecimenClass
Identifierhttp://rs.tdwg.org/dwc/terms/LivingSpecimen
DefinitionA specimen that is alive.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:LivingSpecimen.

PreservedSpecimen

PreservedSpecimenClass
Identifierhttp://rs.tdwg.org/dwc/terms/PreservedSpecimen
DefinitionA specimen that has been preserved.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:PreservedSpecimen.

FossilSpecimen

FossilSpecimenClass
Identifierhttp://rs.tdwg.org/dwc/terms/FossilSpecimen
DefinitionA preserved specimen that is a fossil.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:FossilSpecimen.

Event

EventClass
Identifierhttp://rs.tdwg.org/dwc/terms/Event
DefinitionAn action that occurs at some location during some time.
CommentsExamples: A specimen collection process. A machine observation. For discussion see http://terms.tdwg.org/wiki/dwc:Event.

eventIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/eventID
DefinitionAn identifier for the set of information associated with an Event (something that occurs at a place and time). May be a global unique identifier or an identifier specific to the data set.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:eventID.

parentEventIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/parentEventID
DefinitionAn identifier for the broader Event that groups this and potentially other Events.
CommentsMay be a globally unique identifier or an identifier specific to the data set. Example: A1 as parentEventID to identify the main Whittaker Plot in nested samples, each with its own eventID (e.g., A1:1, A1:2). For discussion see http://terms.tdwg.org/wiki/dwc:parentEventID.

fieldNumberProperty
Identifierhttp://rs.tdwg.org/dwc/terms/fieldNumber
DefinitionAn identifier given to the event in the field. Often serves as a link between field notes and the Event.
CommentsExample: RV Sol 87-03-08, For discussion see http://terms.tdwg.org/wiki/dwc:fieldNumber.

eventDateProperty
Identifierhttp://rs.tdwg.org/dwc/terms/eventDate
DefinitionThe date-time or interval during which an Event occurred. For occurrences, this is the date-time when the event was recorded. Not suitable for a time in a geological context.
CommentsRecommended best practice is to use an encoding scheme, such as ISO 8601:2004(E). Examples: 1963-03-08T14:07-0600 is 8 Mar 1963 2:07pm in the time zone six hours earlier than UTC, 2009-02-20T08:40Z is 20 Feb 2009 8:40am UTC, 1809-02-12 is 12 Feb 1809, 1906-06 is Jun 1906, 1971 is just that year, 2007-03-01T13:00:00Z/2008-05-11T15:30:00Z is the interval between 1 Mar 2007 1pm UTC and 11 May 2008 3:30pm UTC, 2007-11-13/15 is the interval between 13 Nov 2007 and 15 Nov 2007. For discussion see http://terms.tdwg.org/wiki/dwc:eventDate.

eventTimeProperty
Identifierhttp://rs.tdwg.org/dwc/terms/eventTime
DefinitionThe time or interval during which an Event occurred.
CommentsRecommended best practice is to use an encoding scheme, such as ISO 8601:2004(E). Examples: 14:07-0600 is 2:07pm in the time zone six hours earlier than UTC, 08:40:21Z is 8:40:21am UTC, 13:00:00Z/15:30:00Z is the interval between 1pm UTC and 3:30pm UTC. For discussion see http://terms.tdwg.org/wiki/dwc:eventTime.

startDayOfYearProperty
Identifierhttp://rs.tdwg.org/dwc/terms/startDayOfYear
DefinitionThe earliest ordinal day of the year on which the Event occurred (1 for January 1, 365 for December 31, except in a leap year, in which case it is 366).
CommentsExamples: 1 (=1 Jan), 366 (=31 Dec), 365 (=30 Dec in a leap year, 31 Dec in a non-leap year). For discussion see http://terms.tdwg.org/wiki/dwc:startDayOfYear.

endDayOfYearProperty
Identifierhttp://rs.tdwg.org/dwc/terms/endDayOfYear
DefinitionThe latest ordinal day of the year on which the Event occurred (1 for January 1, 365 for December 31, except in a leap year, in which case it is 366).
CommentsExamples: 1 (=1 Jan), 366 (=31 Dec), 365 (=30 Dec in a leap year, 31 Dec in a non-leap year). For discussion see http://terms.tdwg.org/wiki/dwc:endDayOfYear.

yearProperty
Identifierhttp://rs.tdwg.org/dwc/terms/year
DefinitionThe four-digit year in which the Event occurred, according to the Common Era Calendar.
CommentsExample: 2008. For discussion see http://terms.tdwg.org/wiki/dwc:year.

monthProperty
Identifierhttp://rs.tdwg.org/dwc/terms/month
DefinitionThe ordinal month in which the Event occurred.
CommentsExamples: 1 (=January), 10 (=October). For discussion see http://terms.tdwg.org/wiki/dwc:month.

dayProperty
Identifierhttp://rs.tdwg.org/dwc/terms/day
DefinitionThe integer day of the month on which the Event occurred.
CommentsExamples: 9, 28. For discussion see http://terms.tdwg.org/wiki/dwc:day.

verbatimEventDateProperty
Identifierhttp://rs.tdwg.org/dwc/terms/verbatimEventDate
DefinitionThe verbatim original representation of the date and time information for an Event.
CommentsExamples: spring 1910, Marzo 2002, 1999-03-XX, 17IV1934. For discussion see http://terms.tdwg.org/wiki/dwc:verbatimEventDate.

habitatProperty
Identifierhttp://rs.tdwg.org/dwc/terms/habitat
DefinitionA category or description of the habitat in which the Event occurred.
CommentsExamples: oak savanna, pre-cordilleran steppe. For discussion see http://terms.tdwg.org/wiki/dwc:habitat.

samplingProtocolProperty
Identifierhttp://rs.tdwg.org/dwc/terms/samplingProtocol
DefinitionThe name of, reference to, or description of the method or protocol used during an Event.
CommentsExamples: UV light trap, mist net, bottom trawl, ad hoc observation, point count, Penguins from space: faecal stains reveal the location of emperor penguin colonies, https://doi.org/10.1111/j.1466-8238.2009.00467.x, Takats et al. 2001. Guidelines for Nocturnal Owl Monitoring in North America. Beaverhill Bird Observatory and Bird Studies Canada, Edmonton, Alberta. 32 pp., http://www.bsc-eoc.org/download/Owl.pdf. For discussion see http://terms.tdwg.org/wiki/dwc:samplingProtocol.

sampleSizeValueProperty
Identifierhttp://rs.tdwg.org/dwc/terms/sampleSizeValue
DefinitionA numeric value for a measurement of the size (time duration, length, area, or volume) of a sample in a sampling event.
CommentsA sampleSizeValue must have a corresponding sampleSizeUnit. Example: 5 for sampleSizeValue with metre for sampleSizeUnit. For discussion see http://terms.tdwg.org/wiki/dwc:sampleSizeValue.

sampleSizeUnitProperty
Identifierhttp://rs.tdwg.org/dwc/terms/sampleSizeUnit
DefinitionThe unit of measurement of the size (time duration, length, area, or volume) of a sample in a sampling event.
CommentsA sampleSizeUnit must have a corresponding sampleSizeValue, e.g., 5 for sampleSizeValue with metre for sampleSizeUnit. Examples: minute, hour, day, metre, square metre, cubic metre. Recommended best practice is to use a controlled vocabulary such as the Ontology of Units of Measure http://www.wurvoc.org/vocabularies/om-1.8/ of SI units, derived units, or other non-SI units accepted for use within the SI (e.g., minute, hour, day, litre). For discussion see http://terms.tdwg.org/wiki/dwc:sampleSizeUnit.

samplingEffortProperty
Identifierhttp://rs.tdwg.org/dwc/terms/samplingEffort
DefinitionThe amount of effort expended during an Event.
CommentsExamples: 40 trap-nights, 10 observer-hours, 10 km by foot, 30 km by car. For discussion see http://terms.tdwg.org/wiki/dwc:samplingEffort.

fieldNotesProperty
Identifierhttp://rs.tdwg.org/dwc/terms/fieldNotes
DefinitionOne of a) an indicator of the existence of, b) a reference to (publication, URI), or c) the text of notes taken in the field about the Event.
CommentsExample: notes available in Grinnell-Miller Library. For discussion see http://terms.tdwg.org/wiki/dwc:fieldNotes.

eventRemarksProperty
Identifierhttp://rs.tdwg.org/dwc/terms/eventRemarks
DefinitionComments or notes about the Event.
CommentsExample: after the recent rains the river is nearly at flood stage. For discussion see http://terms.tdwg.org/wiki/dwc:eventRemarks.

HumanObservation

HumanObservationClass
Identifierhttp://rs.tdwg.org/dwc/terms/HumanObservation
DefinitionAn output of a human observation process.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:HumanObservation.

MachineObservation

MachineObservationClass
Identifierhttp://rs.tdwg.org/dwc/terms/MachineObservation
DefinitionAn output of a machine observation process.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:MachineObservation.

Location

LocationClass
Identifierhttp://purl.org/dc/terms/Location
DefinitionA spatial region or named place.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:Location.

locationIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/locationID
DefinitionAn identifier for the set of location information (data associated with dcterms:Location). May be a global unique identifier or an identifier specific to the data set.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:locationID.

higherGeographyIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/higherGeographyID
DefinitionAn identifier for the geographic region within which the Location occurred.
CommentsRecommended best practice is to use an persistent identifier from a controlled vocabulary such as the Getty Thesaurus of Geographic Names. Example: TGN: 1002002 for Prov. Tierra del Fuego, Argentina. For discussion see http://terms.tdwg.org/wiki/dwc:higherGeographyID.

higherGeographyProperty
Identifierhttp://rs.tdwg.org/dwc/terms/higherGeography
DefinitionA list (concatenated and separated) of geographic names less specific than the information captured in the locality term.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ), with terms in order from least specific to most specific. Examples: North Atlantic Ocean, South America | Argentina | Patagonia | Parque Nacional Nahuel Huapi | Neuquén | Los Lagos with accompanying values South America in continent, Argentina in country, Neuquén in stateProvince, and Los Lagos in county. For discussion see http://terms.tdwg.org/wiki/dwc:higherGeography.

continentProperty
Identifierhttp://rs.tdwg.org/dwc/terms/continent
DefinitionThe name of the continent in which the Location occurs.
CommentsRecommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names. Examples: Africa, Antarctica, Asia, Europe, North America, Oceania, South America. For discussion see http://terms.tdwg.org/wiki/dwc:continent.

waterBodyProperty
Identifierhttp://rs.tdwg.org/dwc/terms/waterBody
DefinitionThe name of the water body in which the Location occurs.
CommentsRecommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names. Examples: Indian Ocean, Baltic Sea, Hudson River. For discussion see http://terms.tdwg.org/wiki/dwc:waterBody.

islandGroupProperty
Identifierhttp://rs.tdwg.org/dwc/terms/islandGroup
DefinitionThe name of the island group in which the Location occurs.
CommentsRecommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names. Examples: Alexander Archipelago, Seychelles. For discussion see http://terms.tdwg.org/wiki/dwc:islandGroup.

islandProperty
Identifierhttp://rs.tdwg.org/dwc/terms/island
DefinitionThe name of the island on or near which the Location occurs.
CommentsRecommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names. Examples: Isla Victoria, Vancouver, Viti Levu, Zanzibar. For discussion see http://terms.tdwg.org/wiki/dwc:island.

countryProperty
Identifierhttp://rs.tdwg.org/dwc/terms/country
DefinitionThe name of the country or major administrative unit in which the Location occurs.
CommentsRecommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names. Examples: Denmark, Colombia, España. For discussion see http://terms.tdwg.org/wiki/dwc:country.

countryCodeProperty
Identifierhttp://rs.tdwg.org/dwc/terms/countryCode
DefinitionThe standard code for the country in which the Location occurs.
CommentsRecommended best practice is to use ISO 3166-1-alpha-2 country codes. Examples: AR for Argentina, SV for El Salvador. For discussion see http://terms.tdwg.org/wiki/dwc:countryCode.

stateProvinceProperty
Identifierhttp://rs.tdwg.org/dwc/terms/stateProvince
DefinitionThe name of the next smaller administrative region than country (state, province, canton, department, region, etc.) in which the Location occurs.
CommentsRecommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names. Examples: Montana, Minas Gerais, Córdoba. For discussion see http://terms.tdwg.org/wiki/dwc:stateProvince.

countyProperty
Identifierhttp://rs.tdwg.org/dwc/terms/county
DefinitionThe full, unabbreviated name of the next smaller administrative region than stateProvince (county, shire, department, etc.) in which the Location occurs.
CommentsRecommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names. Examples: Missoula, Los Lagos, Mataró. For discussion see http://terms.tdwg.org/wiki/dwc:county.

municipalityProperty
Identifierhttp://rs.tdwg.org/dwc/terms/municipality
DefinitionThe full, unabbreviated name of the next smaller administrative region than county (city, municipality, etc.) in which the Location occurs. Do not use this term for a nearby named place that does not contain the actual location.
CommentsRecommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names. Examples: Holzminden. For discussion see http://terms.tdwg.org/wiki/dwc:municipality.

localityProperty
Identifierhttp://rs.tdwg.org/dwc/terms/locality
DefinitionThe specific description of the place. Less specific geographic information can be provided in other geographic terms (higherGeography, continent, country, stateProvince, county, municipality, waterBody, island, islandGroup). This term may contain information modified from the original to correct perceived errors or standardize the description.
CommentsExample: Bariloche, 25 km NNE via Ruta Nacional 40 (=Ruta 237). For discussion see http://terms.tdwg.org/wiki/dwc:locality.

verbatimLocalityProperty
Identifierhttp://rs.tdwg.org/dwc/terms/verbatimLocality
DefinitionThe original textual description of the place.
CommentsExample: 25 km NNE Bariloche por R. Nac. 237. For discussion see http://terms.tdwg.org/wiki/dwc:verbatimLocality.

minimumElevationInMetersProperty
Identifierhttp://rs.tdwg.org/dwc/terms/minimumElevationInMeters
DefinitionThe lower limit of the range of elevation (altitude, usually above sea level), in meters.
CommentsExample: 100. For discussion see http://terms.tdwg.org/wiki/dwc:minimumElevationInMeters.

maximumElevationInMetersProperty
Identifierhttp://rs.tdwg.org/dwc/terms/maximumElevationInMeters
DefinitionThe upper limit of the range of elevation (altitude, usually above sea level), in meters.
CommentsExample: 200. For discussion see http://terms.tdwg.org/wiki/dwc:maximumElevationInMeters.

verbatimElevationProperty
Identifierhttp://rs.tdwg.org/dwc/terms/verbatimElevation
DefinitionThe original description of the elevation (altitude, usually above sea level) of the Location.
CommentsExample: 100-200 m. For discussion see http://terms.tdwg.org/wiki/dwc:verbatimElevation.

minimumDepthInMetersProperty
Identifierhttp://rs.tdwg.org/dwc/terms/minimumDepthInMeters
DefinitionThe lesser depth of a range of depth below the local surface, in meters.
CommentsExample: 100. For discussion see http://terms.tdwg.org/wiki/dwc:minimumDepthInMeters.

maximumDepthInMetersProperty
Identifierhttp://rs.tdwg.org/dwc/terms/maximumDepthInMeters
DefinitionThe greater depth of a range of depth below the local surface, in meters.
CommentsExample: 200. For discussion see http://terms.tdwg.org/wiki/dwc:maximumDepthInMeters.

verbatimDepthProperty
Identifierhttp://rs.tdwg.org/dwc/terms/verbatimDepth
DefinitionThe original description of the depth below the local surface.
CommentsExample: 100-200 m. For discussion see http://terms.tdwg.org/wiki/dwc:verbatimDepth.

minimumDistanceAboveSurfaceInMetersProperty
Identifierhttp://rs.tdwg.org/dwc/terms/minimumDistanceAboveSurfaceInMeters
DefinitionThe lesser distance in a range of distance from a reference surface in the vertical direction, in meters. Use positive values for locations above the surface, negative values for locations below. If depth measures are given, the reference surface is the location given by the depth, otherwise the reference surface is the location given by the elevation.
CommentsExample: 1.5 meter sediment core from the bottom of a lake (at depth 20m) at 300m elevation: 300m (verbatimElevation), 300 (minimumElevationInMeters), 300 (maximumElevationInMeters), 20m (verbatimDepth), 20 (minimumDepthInMeters), 20 (maximumDepthInMeters), 0 (minimumDistanceAboveSurfaceInMeters), -1.5 (maximumDistanceAboveSurfaceInMeters). For discussion see http://terms.tdwg.org/wiki/dwc:minimumDistanceAboveSurfaceInMeters.

maximumDistanceAboveSurfaceInMetersProperty
Identifierhttp://rs.tdwg.org/dwc/terms/maximumDistanceAboveSurfaceInMeters
DefinitionThe greater distance in a range of distance from a reference surface in the vertical direction, in meters. Use positive values for locations above the surface, negative values for locations below. If depth measures are given, the reference surface is the location given by the depth, otherwise the reference surface is the location given by the elevation.
CommentsExample: 1.5 meter sediment core from the bottom of a lake (at depth 20m) at 300m elevation: verbatimElevation: 300m minimumElevationInMeters: 300, maximumElevationInMeters: 300, verbatimDepth: 20m, minimumDepthInMeters: 20, maximumDepthInMeters: 20, minimumDistanceAboveSurfaceInMeters: 0, maximumDistanceAboveSurfaceInMeters: -1.5. For discussion see http://terms.tdwg.org/wiki/dwc:maximumDistanceAboveSurfaceInMeters.

locationAccordingToProperty
Identifierhttp://rs.tdwg.org/dwc/terms/locationAccordingTo
DefinitionInformation about the source of this Location information. Could be a publication (gazetteer), institution, or team of individuals.
CommentsExamples: Getty Thesaurus of Geographic Names, GADM. For discussion see http://terms.tdwg.org/wiki/dwc:locationAccordingTo.

locationRemarksProperty
Identifierhttp://rs.tdwg.org/dwc/terms/locationRemarks
DefinitionComments or notes about the Location.
CommentsExample: under water since 2005. For discussion see http://terms.tdwg.org/wiki/dwc:locationRemarks.

decimalLatitudeProperty
Identifierhttp://rs.tdwg.org/dwc/terms/decimalLatitude
DefinitionThe geographic latitude (in decimal degrees, using the spatial reference system given in geodeticDatum) of the geographic center of a Location. Positive values are north of the Equator, negative values are south of it. Legal values lie between -90 and 90, inclusive.
CommentsExample: -41.0983423. For discussion see http://terms.tdwg.org/wiki/dwc:decimalLatitude.

decimalLongitudeProperty
Identifierhttp://rs.tdwg.org/dwc/terms/decimalLongitude
DefinitionThe geographic longitude (in decimal degrees, using the spatial reference system given in geodeticDatum) of the geographic center of a Location. Positive values are east of the Greenwich Meridian, negative values are west of it. Legal values lie between -180 and 180, inclusive.
CommentsExample: -121.1761111. For discussion see http://terms.tdwg.org/wiki/dwc:decimalLongitude.

geodeticDatumProperty
Identifierhttp://rs.tdwg.org/dwc/terms/geodeticDatum
DefinitionThe ellipsoid, geodetic datum, or spatial reference system (SRS) upon which the geographic coordinates given in decimalLatitude and decimalLongitude as based.
CommentsRecommended best practice is use the EPSG code as a controlled vocabulary to provide an SRS, if known. Otherwise use a controlled vocabulary for the name or code of the geodetic datum, if known. Otherwise use a controlled vocabulary for the name or code of the ellipsoid, if known. If none of these is known, use the value unknown. Examples: EPSG:4326, WGS84, NAD27, Campo Inchauspe, European 1950, Clarke 1866. For discussion see http://terms.tdwg.org.wiki/dwc:geodeticDatum.

coordinateUncertaintyInMetersProperty
Identifierhttp://rs.tdwg.org/dwc/terms/coordinateUncertaintyInMeters
DefinitionThe horizontal distance (in meters) from the given decimalLatitude and decimalLongitude describing the smallest circle containing the whole of the Location. Leave the value empty if the uncertainty is unknown, cannot be estimated, or is not applicable (because there are no coordinates). Zero is not a valid value for this term.
CommentsExamples: 30 (reasonable lower limit of a GPS reading under good conditions if the actual precision was not recorded at the time), 71 (uncertainty for a UTM coordinate having 100 meter precision and a known spatial reference system). For discussion see http://terms.tdwg.org/wiki/dwc:coordinateUncertaintyInMeters.

coordinatePrecisionProperty
Identifierhttp://rs.tdwg.org/dwc/terms/coordinatePrecision
DefinitionA decimal representation of the precision of the coordinates given in the decimalLatitude and decimalLongitude.
CommentsExamples: 0.00001 (normal GPS limit for decimal degrees), 0.000278 (nearest second), 0.01667 (nearest minute), 1.0 (nearest degree). For discussion see http://terms.tdwg.org/wiki/dwc:coordinatePrecision.

pointRadiusSpatialFitProperty
Identifierhttp://rs.tdwg.org/dwc/terms/pointRadiusSpatialFit
DefinitionThe ratio of the area of the point-radius (decimalLatitude, decimalLongitude, coordinateUncertaintyInMeters) to the area of the true (original, or most specific) spatial representation of the Location. Legal values are 0, greater than or equal to 1, or undefined. A value of 1 is an exact match or 100% overlap. A value of 0 should be used if the given point-radius does not completely contain the original representation. The pointRadiusSpatialFit is undefined (and should be left blank) if the original representation is a point without uncertainty and the given georeference is not that same point (without uncertainty). If both the original and the given georeference are the same point, the pointRadiusSpatialFit is 1.
CommentsDetailed explanations with graphical examples can be found in the Guide to Best Practices for Georeferencing, Chapman and Wieczorek, eds. 2006. For discussion see http://terms.tdwg.org/wiki/dwc:pointRadiusSpatialFit.

verbatimCoordinatesProperty
Identifierhttp://rs.tdwg.org/dwc/terms/verbatimCoordinates
DefinitionThe verbatim original spatial coordinates of the Location. The coordinate ellipsoid, geodeticDatum, or full Spatial Reference System (SRS) for these coordinates should be stored in verbatimSRS and the coordinate system should be stored in verbatimCoordinateSystem.
CommentsExamples: 41 05 54S 121 05 34W, 17T 630000 4833400. For discussion see http://terms.tdwg.org/wiki/dwc:verbatimCoordinates.

verbatimLatitudeProperty
Identifierhttp://rs.tdwg.org/dwc/terms/verbatimLatitude
DefinitionThe verbatim original latitude of the Location. The coordinate ellipsoid, geodeticDatum, or full Spatial Reference System (SRS) for these coordinates should be stored in verbatimSRS and the coordinate system should be stored in verbatimCoordinateSystem.
CommentsExample: 41 05 54.03S. For discussion see http://terms.tdwg.org/wiki/dwc:verbatimLatitude.

verbatimLongitudeProperty
Identifierhttp://rs.tdwg.org/dwc/terms/verbatimLongitude
DefinitionThe verbatim original longitude of the Location. The coordinate ellipsoid, geodeticDatum, or full Spatial Reference System (SRS) for these coordinates should be stored in verbatimSRS and the coordinate system should be stored in verbatimCoordinateSystem.
CommentsExample: 121d 10' 34" W. For discussion see http://terms.tdwg.org/wiki/dwc:verbatimLongitude.

verbatimCoordinateSystemProperty
Identifierhttp://rs.tdwg.org/dwc/terms/verbatimCoordinateSystem
DefinitionThe spatial coordinate system for the verbatimLatitude and verbatimLongitude or the verbatimCoordinates of the Location.
CommentsRecommended best practice is to use a controlled vocabulary. Examples: decimal degrees, degrees decimal minutes, degrees minutes seconds, UTM. verbatimCoordinateSystem.

verbatimSRSProperty
Identifierhttp://rs.tdwg.org/dwc/terms/verbatimSRS
DefinitionThe ellipsoid, geodetic datum, or spatial reference system (SRS) upon which coordinates given in verbatimLatitude and verbatimLongitude, or verbatimCoordinates are based.
CommentsRecommended best practice is use the EPSG code as a controlled vocabulary to provide an SRS, if known. Otherwise use a controlled vocabulary for the name or code of the geodetic datum, if known. Otherwise use a controlled vocabulary for the name or code of the ellipsoid, if known. If none of these is known, use the value unknown. Examples: EPSG:4326, WGS84, NAD27, Campo Inchauspe, European 1950, Clarke 1866. For discussion see http://terms.tdwg.org/wiki/dwc:verbatimSRS.

footprintWKTProperty
Identifierhttp://rs.tdwg.org/dwc/terms/footprintWKT
DefinitionA Well-Known Text (WKT) representation of the shape (footprint, geometry) that defines the Location. A Location may have both a point-radius representation (see decimalLatitude) and a footprint representation, and they may differ from each other.
CommentsExample: the one-degree bounding box with opposite corners at (longitude=10, latitude=20) and (longitude=11, latitude=21) would be expressed in well-known text as POLYGON ((10 20, 11 20, 11 21, 10 21, 10 20)). For discussion see http://terms.tdwg.org/wiki/dwc:footprintWKT.

footprintSRSProperty
Identifierhttp://rs.tdwg.org/dwc/terms/footprintSRS
DefinitionA Well-Known Text (WKT) representation of the Spatial Reference System (SRS) for the footprintWKT of the Location. Do not use this term to describe the SRS of the decimalLatitude and decimalLongitude, even if it is the same as for the footprintWKT - use the geodeticDatum instead.
CommentsExample: The WKT for the standard WGS84 SRS (EPSG:4326) is GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433]]. For discussion see http://terms.tdwg.org/wiki/dwc:footprintSRS.

footprintSpatialFitProperty
Identifierhttp://rs.tdwg.org/dwc/terms/footprintSpatialFit
DefinitionThe ratio of the area of the footprint (footprintWKT) to the area of the true (original, or most specific) spatial representation of the Location. Legal values are 0, greater than or equal to 1, or undefined. A value of 1 is an exact match or 100% overlap. A value of 0 should be used if the given footprint does not completely contain the original representation. The footprintSpatialFit is undefined (and should be left blank) if the original representation is a point and the given georeference is not that same point. If both the original and the given georeference are the same point, the footprintSpatialFit is 1.
CommentsDetailed explanations with graphical examples can be found in the Guide to Best Practices for Georeferencing, Chapman and Wieczorek, eds. 2006. For discussion see http://terms.tdwg.org/wiki/dwc:footprintSpatialFit.

georeferencedByProperty
Identifierhttp://rs.tdwg.org/dwc/terms/georeferencedBy
DefinitionA list (concatenated and separated) of names of people, groups, or organizations who determined the georeference (spatial representation) for the Location.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ). Examples: Brad Millen (ROM), Kristina Yamamoto (MVZ) | Janet Fang (MVZ). For discussion see http://terms.tdwg.org/wiki/dwc:georeferencedBy.

georeferencedDateProperty
Identifierhttp://rs.tdwg.org/dwc/terms/georeferencedDate
DefinitionThe date on which the Location was georeferenced.
CommentsRecommended best practice is to use an encoding scheme, such as ISO 8601:2004(E). Examples: 1963-03-08T14:07-0600 is 8 Mar 1963 2:07pm in the time zone six hours earlier than UTC, 2009-02-20T08:40Z is 20 Feb 2009 8:40am UTC, 1809-02-12 is 12 Feb 1809, 1906-06 is Jun 1906, 1971 is just that year, 2007-03-01T13:00:00Z/2008-05-11T15:30:00Z is the interval between 1 Mar 2007 1pm UTC and 11 May 2008 3:30pm UTC, 2007-11-13/15 is the interval between 13 Nov 2007 and 15 Nov 2007. For discussion see http://terms.tdwg.org/wiki/dwc:georeferencedDate.

georeferenceProtocolProperty
Identifierhttp://rs.tdwg.org/dwc/terms/georeferenceProtocol
DefinitionA description or reference to the methods used to determine the spatial footprint, coordinates, and uncertainties.
CommentsExamples: Guide to Best Practices for Georeferencing. (Chapman and Wieczorek, eds. 2006). Global Biodiversity Information Facility., MaNIS/HerpNet/ORNIS Georeferencing Guidelines, Georeferencing Quick Reference Guide. For discussion see http://terms.tdwg.org/wiki/dwc:georeferenceProtocol.

georeferenceSourcesProperty
Identifierhttp://rs.tdwg.org/dwc/terms/georeferenceSources
DefinitionA list (concatenated and separated) of maps, gazetteers, or other resources used to georeference the Location, described specifically enough to allow anyone in the future to use the same resources.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ). Examples: GeoLocate, USGS 1:24000 Florence Montana Quad | Terrametrics 2008 on Google Earth. For discussion see http://terms.tdwg.org/wiki/dwc:georeferenceSources.

georeferenceVerificationStatusProperty
Identifierhttp://rs.tdwg.org/dwc/terms/georeferenceVerificationStatus
DefinitionA categorical description of the extent to which the georeference has been verified to represent the best possible spatial description.
CommentsRecommended best practice is to use a controlled vocabulary. Examples: requires verification, verified by collector, verified by curator. For discussion see http://terms.tdwg.org/wiki/dwc:georeferenceVerificationStatus.

georeferenceRemarksProperty
Identifierhttp://rs.tdwg.org/dwc/terms/georeferenceRemarks
DefinitionNotes or comments about the spatial description determination, explaining assumptions made in addition or opposition to the those formalized in the method referred to in georeferenceProtocol.
CommentsExample: assumed distance by road (Hwy. 101). For discussion see http://terms.tdwg.org/wiki/dwc:georeferenceRemarks.

GeologicalContext

GeologicalContextClass
Identifierhttp://rs.tdwg.org/dwc/terms/GeologicalContext
DefinitionGeological information, such as stratigraphy, that qualifies a region or place.
CommentsExample: A lithostratigraphic layer. For discussion see http://terms.tdwg.org/wiki/dwc:GeologicalContext.

geologicalContextIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/geologicalContextID
DefinitionAn identifier for the set of information associated with a GeologicalContext (the location within a geological context, such as stratigraphy). May be a global unique identifier or an identifier specific to the data set.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:geologicalContextID.

earliestEonOrLowestEonothemProperty
Identifierhttp://rs.tdwg.org/dwc/terms/earliestEonOrLowestEonothem
DefinitionThe full name of the earliest possible geochronologic eon or lowest chrono-stratigraphic eonothem or the informal name ("Precambrian") attributable to the stratigraphic horizon from which the cataloged item was collected.
CommentsExamples: Phanerozoic, Proterozoic. For discussion see http://terms.tdwg.org/wiki/dwc:earliestEonOrLowestEonothem.

latestEonOrHighestEonothemProperty
Identifierhttp://rs.tdwg.org/dwc/terms/latestEonOrHighestEonothem
DefinitionThe full name of the latest possible geochronologic eon or highest chrono-stratigraphic eonothem or the informal name ("Precambrian") attributable to the stratigraphic horizon from which the cataloged item was collected.
CommentsExamples: Phanerozoic, Proterozoic. For discussion see http://terms.tdwg.org/wiki/dwc:latestEonOrHighestEonothem.

earliestEraOrLowestErathemProperty
Identifierhttp://rs.tdwg.org/dwc/terms/earliestEraOrLowestErathem
DefinitionThe full name of the earliest possible geochronologic era or lowest chronostratigraphic erathem attributable to the stratigraphic horizon from which the cataloged item was collected.
CommentsExamples: Cenozoic, Mesozoic. For discussion see http://terms.tdwg.org/wiki/dwc:earliestEraOrLowestErathem.

latestEraOrHighestErathemProperty
Identifierhttp://rs.tdwg.org/dwc/terms/latestEraOrHighestErathem
DefinitionThe full name of the latest possible geochronologic era or highest chronostratigraphic erathem attributable to the stratigraphic horizon from which the cataloged item was collected.
CommentsExamples: Cenozoic, Mesozoic. For discussion see http://terms.tdwg.org/wiki/dwc:latestEraOrHighestErathem.

earliestPeriodOrLowestSystemProperty
Identifierhttp://rs.tdwg.org/dwc/terms/earliestPeriodOrLowestSystem
DefinitionThe full name of the earliest possible geochronologic period or lowest chronostratigraphic system attributable to the stratigraphic horizon from which the cataloged item was collected.
CommentsExamples: Neogene, Tertiary, Quaternary. For discussion see http://terms.tdwg.org/wiki/dwc:earliestPeriodOrLowestSystem.

latestPeriodOrHighestSystemProperty
Identifierhttp://rs.tdwg.org/dwc/terms/latestPeriodOrHighestSystem
DefinitionThe full name of the latest possible geochronologic period or highest chronostratigraphic system attributable to the stratigraphic horizon from which the cataloged item was collected.
CommentsExamples: Neogene, Tertiary, Quaternary. For discussion see http://terms.tdwg.org/wiki/dwc:latestPeriodOrHighestSystem.

earliestEpochOrLowestSeriesProperty
Identifierhttp://rs.tdwg.org/dwc/terms/earliestEpochOrLowestSeries
DefinitionThe full name of the earliest possible geochronologic epoch or lowest chronostratigraphic series attributable to the stratigraphic horizon from which the cataloged item was collected.
CommentsExamples: Holocene, Pleistocene, Ibexian Series. For discussion see http://terms.tdwg.org/wiki/dwc:earliestEpochOrLowestSeries.

latestEpochOrHighestSeriesProperty
Identifierhttp://rs.tdwg.org/dwc/terms/latestEpochOrHighestSeries
DefinitionThe full name of the latest possible geochronologic epoch or highest chronostratigraphic series attributable to the stratigraphic horizon from which the cataloged item was collected.
CommentsExamples: Holocene, Pleistocene, Ibexian Series. For discussion see http://terms.tdwg.org/wiki/dwc:latestEpochOrHighestSeries.

earliestAgeOrLowestStageProperty
Identifierhttp://rs.tdwg.org/dwc/terms/earliestAgeOrLowestStage
DefinitionThe full name of the earliest possible geochronologic age or lowest chronostratigraphic stage attributable to the stratigraphic horizon from which the cataloged item was collected.
CommentsExamples: Atlantic, Boreal, Skullrockian. For discussion see http://terms.tdwg.org/wiki/dwc:earliestAgeOrLowestStage.

latestAgeOrHighestStageProperty
Identifierhttp://rs.tdwg.org/dwc/terms/latestAgeOrHighestStage
DefinitionThe full name of the latest possible geochronologic age or highest chronostratigraphic stage attributable to the stratigraphic horizon from which the cataloged item was collected.
CommentsExamples: Atlantic, Boreal, Skullrockian. For discussion see http://terms.tdwg.org/wiki/dwc:latestAgeOrHighestStage.

lowestBiostratigraphicZoneProperty
Identifierhttp://rs.tdwg.org/dwc/terms/lowestBiostratigraphicZone
DefinitionThe full name of the lowest possible geological biostratigraphic zone of the stratigraphic horizon from which the cataloged item was collected.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:lowestBiostratigraphicZone.

highestBiostratigraphicZoneProperty
Identifierhttp://rs.tdwg.org/dwc/terms/highestBiostratigraphicZone
DefinitionThe full name of the highest possible geological biostratigraphic zone of the stratigraphic horizon from which the cataloged item was collected.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:highestBiostratigraphicZone.

lithostratigraphicTermsProperty
Identifierhttp://rs.tdwg.org/dwc/terms/lithostratigraphicTerms
DefinitionThe combination of all litho-stratigraphic names for the rock from which the cataloged item was collected.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:lithostratigraphicTerms.

groupProperty
Identifierhttp://rs.tdwg.org/dwc/terms/group
DefinitionThe full name of the lithostratigraphic group from which the cataloged item was collected.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:group.

formationProperty
Identifierhttp://rs.tdwg.org/dwc/terms/formation
DefinitionThe full name of the lithostratigraphic formation from which the cataloged item was collected.
CommentsExamples: Notch Peak Fromation, House Limestone, Fillmore Formation. For discussion see http://terms.tdwg.org/wiki/dwc:formation.

memberProperty
Identifierhttp://rs.tdwg.org/dwc/terms/member
DefinitionThe full name of the lithostratigraphic member from which the cataloged item was collected.
CommentsExamples: Lava Dam Member, Hellnmaria Member. For discussion see http://terms.tdwg.org/wiki/dwc:member.

bedProperty
Identifierhttp://rs.tdwg.org/dwc/terms/bed
DefinitionThe full name of the lithostratigraphic bed from which the cataloged item was collected.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:bed.

Identification

IdentificationClass
Identifierhttp://rs.tdwg.org/dwc/terms/Identification
DefinitionA taxonomic determination (e.g., the assignment to a taxon).
CommentsExample: A subspecies determination of an organism. For discussion see http://terms.tdwg.org/wiki/dwc:Identification.

identificationIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/identificationID
DefinitionAn identifier for the Identification (the body of information associated with the assignment of a scientific name). May be a global unique identifier or an identifier specific to the data set.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:identificationID.

identificationQualifierProperty
Identifierhttp://rs.tdwg.org/dwc/terms/identificationQualifier
DefinitionA brief phrase or a standard term ("cf.", "aff.") to express the determiner's doubts about the Identification.
CommentsExamples: 1) For the determination Quercus aff. agrifolia var. oxyadenia: aff. agrifolia var. oxyadenia (identificationQualifier) with accompanying values Quercus (genus), agrifolia (specificEpithet), oxyadenia (infraspecificEpithet), and var. (taxonRank). 2) For the determination Quercus agrifolia cf. var. oxyadenia: cf. var. oxyadenia (identificationQualifier) with accompanying values Quercus (genus), agrifolia (specificEpithet), oxyadenia (infraspecificEpithet), and var. (taxonRank). For discussion see http://terms.tdwg.org/wiki/dwc:identificationQualifier.

typeStatusProperty
Identifierhttp://rs.tdwg.org/dwc/terms/typeStatus
DefinitionA list (concatenated and separated) of nomenclatural types (type status, typified scientific name, publication) applied to the subject.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ). Examples: holotype of Ctenomys sociabilis. Pearson O. P., and M. I. Christie. 1985. Historia Natural, 5(37):388, holotype of Pinus abies | holotype of Picea abies. For discussion see http://terms.tdwg.org/wiki/dwc:typeStatus.

identifiedByProperty
Identifierhttp://rs.tdwg.org/dwc/terms/identifiedBy
DefinitionA list (concatenated and separated) of names of people, groups, or organizations who assigned the Taxon to the subject.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ). Examples: James L. Patton, Theodore Pappenfuss | Robert Macey. For discussion see http://terms.tdwg.org/wiki/dwc:identifiedBy.

dateIdentifiedProperty
Identifierhttp://rs.tdwg.org/dwc/terms/dateIdentified
DefinitionThe date on which the subject was identified as representing the Taxon.
CommentsRecommended best practice is to use an encoding scheme, such as ISO 8601:2004(E). Examples: 1963-03-08T14:07-0600 is 8 Mar 1963 2:07pm in the time zone six hours earlier than UTC, 2009-02-20T08:40Z is 20 Feb 2009 8:40am UTC, 1809-02-12 is 12 Feb 1809, 1906-06 is Jun 1906, 1971 is just that year, 2007-03-01T13:00:00Z/2008-05-11T15:30:00Z is the interval between 1 Mar 2007 1pm UTC and 11 May 2008 3:30pm UTC, 2007-11-13/15 is the interval between 13 Nov 2007 and 15 Nov 2007. For discussion see http://terms.tdwg.org/wiki/dwc:dateIdentified.

identificationReferencesProperty
Identifierhttp://rs.tdwg.org/dwc/terms/identificationReferences
DefinitionA list (concatenated and separated) of references (publication, global unique identifier, URI) used in the Identification.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ). Examples: Aves del Noroeste Patagonico. Christie et al. 2004., Stebbins, R. Field Guide to Western Reptiles and Amphibians. 3rd Edition. 2003. | Irschick, D.J. and Shaffer, H.B. (1997). The polytypic species revisited: Morphological differentiation among tiger salamanders (Ambystoma tigrinum) (Amphibia: Caudata). Herpetologica, 53(1), 30-49.. For discussion see http://terms.tdwg.org/wiki/dwc:identificationReferences.

identificationVerificationStatusProperty
Identifierhttp://rs.tdwg.org/dwc/terms/identificationVerificationStatus
DefinitionA categorical indicator of the extent to which the taxonomic identification has been verified to be correct.
CommentsRecommended best practice is to use a controlled vocabulary such as that used in HISPID/ABCD. Examples: 0, 4. For discussion see http://terms.tdwg.org/wiki/dwc:identificationVerificationStatus.

identificationRemarksProperty
Identifierhttp://rs.tdwg.org/dwc/terms/identificationRemarks
DefinitionComments or notes about the Identification.
CommentsExample: Distinguished between Anthus correndera and Anthus hellmayri based on the comparative lengths of the uñas. For discussion see http://terms.tdwg.org/wiki/dwc:identificationRemarks.

Taxon

TaxonClass
Identifierhttp://rs.tdwg.org/dwc/terms/Taxon
DefinitionA group of organisms (sensu http://purl.obolibrary.org/obo/OBI_0100026) considered by taxonomists to form a homogeneous unit.
CommentsExample: The genus Truncorotaloides as published by Brönnimann et al. in 1953 in the Journal of Paleontology Vol. 27(6) p. 817-820. For discussion see http://terms.tdwg.org/wiki/dwc:Taxon.

taxonIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/taxonID
DefinitionAn identifier for the set of taxon information (data associated with the Taxon class). May be a global unique identifier or an identifier specific to the data set.
CommentsExamples: 8fa58e08-08de-4ac1-b69c-1235340b7001, 32567, http://species.gbif.org/abies_alba_1753, urn:lsid:gbif.org:usages:32567. For discussion see http://terms.tdwg.org/wiki/dwc:taxonID.

scientificNameIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/scientificNameID
DefinitionAn identifier for the nomenclatural (not taxonomic) details of a scientific name.
CommentsExample: urn:lsid:ipni.org:names:37829-1:1.3. For discussion see http://terms.tdwg.org/wiki/dwc:scientificNameID.

acceptedNameUsageIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/acceptedNameUsageID
DefinitionAn identifier for the name usage (documented meaning of the name according to a source) of the currently valid (zoological) or accepted (botanical) taxon.
CommentsExample: 8fa58e08-08de-4ac1-b69c-1235340b7001. For discussion see http://terms.tdwg.org/wiki/dwc:acceptedNameUsageID.

parentNameUsageIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/parentNameUsageID
DefinitionAn identifier for the name usage (documented meaning of the name according to a source) of the direct, most proximate higher-rank parent taxon (in a classification) of the most specific element of the scientificName.
CommentsExample: 8fa58e08-08de-4ac1-b69c-1235340b7001. For discussion see http://terms.tdwg.org/wiki/dwc:parentNameUsageID.

originalNameUsageIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/originalNameUsageID
DefinitionAn identifier for the name usage (documented meaning of the name according to a source) in which the terminal element of the scientificName was originally established under the rules of the associated nomenclaturalCode.
CommentsExample: http://species.gbif.org/abies_alba_1753. For discussion see http://terms.tdwg.org/wiki/dwc:originalNameUsageID.

nameAccordingToIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/nameAccordingToID
DefinitionAn identifier for the source in which the specific taxon concept circumscription is defined or implied. See nameAccordingTo.
CommentsExample: https://doi.org/10.1016/S0269-915X(97)80026-2. For discussion see http://terms.tdwg.org/wiki/dwc:nameSccordingToID.

namePublishedInIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/namePublishedInID
DefinitionAn identifier for the publication in which the scientificName was originally established under the rules of the associated nomenclaturalCode.
CommentsExample: http://hdl.handle.net/10199/7. For discussion see http://terms.tdwg.org/wiki/dwc:namePublishedInID.

taxonConceptIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/taxonConceptID
DefinitionAn identifier for the taxonomic concept to which the record refers - not for the nomenclatural details of a taxon.
CommentsExample: 8fa58e08-08de-4ac1-b69c-1235340b7001. For discussion see http://terms.tdwg.org/wiki/dwc:taxonConceptID.

scientificNameProperty
Identifierhttp://rs.tdwg.org/dwc/terms/scientificName
DefinitionThe full scientific name, with authorship and date information if known. When forming part of an Identification, this should be the name in lowest level taxonomic rank that can be determined. This term should not contain identification qualifications, which should instead be supplied in the IdentificationQualifier term.
CommentsExamples: Coleoptera (order), Vespertilionidae (family), Manis (genus), Ctenomys sociabilis (genus + specificEpithet), Ambystoma tigrinum diaboli (genus + specificEpithet + infraspecificEpithet), Roptrocerus typographi (Györfi, 1952) (genus + specificEpithet + scientificNameAuthorship), Quercus agrifolia var. oxyadenia (Torr.) J.T. Howell (genus + specificEpithet + taxonRank + infraspecificEpithet + scientificNameAuthorship). For discussion see http://terms.tdwg.org/wiki/dwc:scientificName.

acceptedNameUsageProperty
Identifierhttp://rs.tdwg.org/dwc/terms/acceptedNameUsage
DefinitionThe full name, with authorship and date information if known, of the currently valid (zoological) or accepted (botanical) taxon.
CommentsExample: Tamias minimus valid name for Eutamias minimus. For discussion see http://terms.tdwg.org/wiki/dwc:acceptedNameUsage.

parentNameUsageProperty
Identifierhttp://rs.tdwg.org/dwc/terms/parentNameUsage
DefinitionThe full name, with authorship and date information if known, of the direct, most proximate higher-rank parent taxon (in a classification) of the most specific element of the scientificName.
CommentsExamples: Rubiaceae, Gruiformes, Testudinae. For discussion see http://terms.tdwg.org/wiki/dwc:parentNameUsage.

originalNameUsageProperty
Identifierhttp://rs.tdwg.org/dwc/terms/originalNameUsage
DefinitionThe taxon name, with authorship and date information if known, as it originally appeared when first established under the rules of the associated nomenclaturalCode. The basionym (botany) or basonym (bacteriology) of the scientificName or the senior/earlier homonym for replaced names.
CommentsExamples: Pinus abies, Gasterosteus saltatrix Linnaeus 1768. For discussion see http://terms.tdwg.org/wiki/dwc:originalNameUsage.

nameAccordingToProperty
Identifierhttp://rs.tdwg.org/dwc/terms/nameAccordingTo
DefinitionThe reference to the source in which the specific taxon concept circumscription is defined or implied - traditionally signified by the Latin "sensu" or "sec." (from secundum, meaning "according to"). For taxa that result from identifications, a reference to the keys, monographs, experts and other sources should be given.
CommentsExample: McCranie, J. R., D. B. Wake, and L. D. Wilson. 1996. The taxonomic status of Bolitoglossa schmidti, with comments on the biology of the Mesoamerican salamander Bolitoglossa dofleini (Caudata: Plethodontidae). Carib. J. Sci. 32:395-398., Werner Greuter 2008, Lilljeborg 1861, Upsala Univ. Arsskrift, Math. Naturvet., pp. 4, 5. For discussion see http://terms.tdwg.org/wiki/dwc:nameAccordingTo.

namePublishedInProperty
Identifierhttp://rs.tdwg.org/dwc/terms/namePublishedIn
DefinitionA reference for the publication in which the scientificName was originally established under the rules of the associated nomenclaturalCode.
CommentsExamples: Pearson O. P., and M. I. Christie. 1985. Historia Natural, 5(37):388, Forel, Auguste, Diagnosies provisoires de quelques espèces nouvelles de fourmis de Madagascar, récoltées par M. Grandidier., Annales de la Societe Entomologique de Belgique, Comptes-rendus des Seances 30, 1886. For discussion see http://terms.tdwg.org/wiki/dwc:namePublishedIn.

namePublishedInYearProperty
Identifierhttp://rs.tdwg.org/dwc/terms/namePublishedInYear
DefinitionThe four-digit year in which the scientificName was published.
CommentsExamples: 1915, 2008. For discussion see http://terms.tdwg.org/wiki/dwc:namePublishedInYear.

higherClassificationProperty
Identifierhttp://rs.tdwg.org/dwc/terms/higherClassification
DefinitionA list (concatenated and separated) of taxa names terminating at the rank immediately superior to the taxon referenced in the taxon record.
CommentsRecommended best practice is to separate the values with a vertical bar ( | ), with terms in order from the highest taxonomic rank to the lowest. Examples: Animalia, Animalia | Chordata | Vertebrata | Mammalia | Theria | Eutheria | Rodentia | Hystricognatha | Hystricognathi | Ctenomyidae | Ctenomyini | Ctenomys. For discussion see http://terms.tdwg.org/wiki/dwc:higherClassification.

kingdomProperty
Identifierhttp://rs.tdwg.org/dwc/terms/kingdom
DefinitionThe full scientific name of the kingdom in which the taxon is classified.
CommentsExamples: Animalia, Plantae. For discussion see http://terms.tdwg.org/wiki/dwc:kingdom.

phylumProperty
Identifierhttp://rs.tdwg.org/dwc/terms/phylum
DefinitionThe full scientific name of the phylum or division in which the taxon is classified.
CommentsExamples: Chordata (phylum), Bryophyta (division). For discussion see http://terms.tdwg.org/wiki/dwc:phylum.

classProperty
Identifierhttp://rs.tdwg.org/dwc/terms/class
DefinitionThe full scientific name of the class in which the taxon is classified.
CommentsExamples: Mammalia, Hepaticopsida. For discussion see http://terms.tdwg.org/wiki/dwc:class.

orderProperty
Identifierhttp://rs.tdwg.org/dwc/terms/order
DefinitionThe full scientific name of the order in which the taxon is classified.
CommentsExamples: Carnivora, Monocleales. For discussion see http://terms.tdwg.org/wiki/dwc:order.

familyProperty
Identifierhttp://rs.tdwg.org/dwc/terms/family
DefinitionThe full scientific name of the family in which the taxon is classified.
CommentsExamples: Felidae, Monocleaceae. For discussion see http://terms.tdwg.org/wiki/dwc:family.

genusProperty
Identifierhttp://rs.tdwg.org/dwc/terms/genus
DefinitionThe full scientific name of the genus in which the taxon is classified.
CommentsExamples: Puma, Monoclea. For discussion see http://terms.tdwg.org/wiki/dwc:genus.

subgenusProperty
Identifierhttp://rs.tdwg.org/dwc/terms/subgenus
DefinitionThe full scientific name of the subgenus in which the taxon is classified. Values should include the genus to avoid homonym confusion.
CommentsExamples: Strobus (Pinus), Puma (Puma) Loligo (Amerigo), Hieracium subgen. Pilosella. For discussion see http://terms.tdwg.org/wiki/dwc:subgenus.

specificEpithetProperty
Identifierhttp://rs.tdwg.org/dwc/terms/specificEpithet
DefinitionThe name of the first or species epithet of the scientificName.
CommentsExamples: concolor, gottschei. For discussion see http://terms.tdwg.org/wiki/dwc:specificEpithet.

infraspecificEpithetProperty
Identifierhttp://rs.tdwg.org/dwc/terms/infraspecificEpithet
DefinitionThe name of the lowest or terminal infraspecific epithet of the scientificName, excluding any rank designation.
CommentsExamples: concolor, oxyadenia, sayi. For discussion see http://terms.tdwg.org/wiki/dwc:infraspecificEpithet.

taxonRankProperty
Identifierhttp://rs.tdwg.org/dwc/terms/taxonRank
DefinitionThe taxonomic rank of the most specific name in the scientificName.
CommentsRecommended best practice is to use a controlled vocabulary. Examples: subspecies, varietas, forma, species, genus. For discussion see http://terms.tdwg.org/wiki/dwc:taxonRank.

verbatimTaxonRankProperty
Identifierhttp://rs.tdwg.org/dwc/terms/verbatimTaxonRank
DefinitionThe taxonomic rank of the most specific name in the scientificName as it appears in the original record.
CommentsExamples: Agamospecies, sub-lesus, prole, apomict, nothogrex, sp., subsp., var.. For discussion see http://terms.tdwg.org/wiki/dwc:verbatimTaxonRank.

scientificNameAuthorshipProperty
Identifierhttp://rs.tdwg.org/dwc/terms/scientificNameAuthorship
DefinitionThe authorship information for the scientificName formatted according to the conventions of the applicable nomenclaturalCode.
CommentsExample: (Torr.) J.T. Howell, (Martinovský) Tzvelev, (Györfi, 1952). For discussion see http://terms.tdwg.org/wiki/dwc:scientificNameAuthorship.

vernacularNameProperty
Identifierhttp://rs.tdwg.org/dwc/terms/vernacularName
DefinitionA common or vernacular name.
CommentsExamples: Andean Condor, Condor Andino, American Eagle, Gänsegeier. For discussion see http://terms.tdwg.org/wiki/dwc:vernacularName.

nomenclaturalCodeProperty
Identifierhttp://rs.tdwg.org/dwc/terms/nomenclaturalCode
DefinitionThe nomenclatural code (or codes in the case of an ambiregnal name) under which the scientificName is constructed.
CommentsRecommended best practice is to use a controlled vocabulary. Examples: ICN, ICZN, BC, ICNCP, BioCode, ICZN | ICBN. For discussion see http://terms.tdwg.org/wiki/dwc:nomenclaturalCode.

taxonomicStatusProperty
Identifierhttp://rs.tdwg.org/dwc/terms/taxonomicStatus
DefinitionThe status of the use of the scientificName as a label for a taxon. Requires taxonomic opinion to define the scope of a taxon. Rules of priority then are used to define the taxonomic status of the nomenclature contained in that scope, combined with the experts opinion. It must be linked to a specific taxonomic reference that defines the concept.
CommentsRecommended best practice is to use a controlled vocabulary. Examples: invalid, misapplied, homotypic synonym, accepted. For discussion see http://terms.tdwg.org/wiki/dwc:taxonomicStatus.

nomenclaturalStatusProperty
Identifierhttp://rs.tdwg.org/dwc/terms/nomenclaturalStatus
DefinitionThe status related to the original publication of the name and its conformance to the relevant rules of nomenclature. It is based essentially on an algorithm according to the business rules of the code. It requires no taxonomic opinion.
CommentsExamples: nom. ambig., nom. illeg., nom. subnud.. For discussion see http://terms.tdwg.org/wiki/dwc:nomenclaturalStatus.

taxonRemarksProperty
Identifierhttp://rs.tdwg.org/dwc/terms/taxonRemarks
DefinitionComments or notes about the taxon or name.
CommentsExample: this name is a misspelling in common use. For discussion see http://terms.tdwg.org/wiki/dwc:taxonRemarks.

MeasurementOrFact

MeasurementOrFactClass
Identifierhttp://rs.tdwg.org/dwc/terms/MeasurementOrFact
DefinitionA measurement of or fact about an rdfs:Resource (http://www.w3.org/2000/01/rdf-schema#Resource).
CommentsResources can be thought of as identifiable records or instances of classes and may include, but need not be limited to Occurrences, Organisms, MaterialSamples, Events, Locations, GeologicalContexts, Identifications, or Taxa. Examples: The weight of an organism in grams. The number of placental scars. For discussion see http://terms.tdwg.org/wiki/dwc:MeasurementOrFact.

measurementIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/measurementID
DefinitionAn identifier for the MeasurementOrFact (information pertaining to measurements, facts, characteristics, or assertions). May be a global unique identifier or an identifier specific to the data set.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:measurementID.

measurementTypeProperty
Identifierhttp://rs.tdwg.org/dwc/terms/measurementType
DefinitionThe nature of the measurement, fact, characteristic, or assertion.
CommentsRecommended best practice is to use a controlled vocabulary. Examples: tail length, temperature, trap line length, survey area, trap type. For discussion see http://terms.tdwg.org/wiki/dwc:measurementType.

measurementValueProperty
Identifierhttp://rs.tdwg.org/dwc/terms/measurementValue
DefinitionThe value of the measurement, fact, characteristic, or assertion.
CommentsExamples: 45, 20, 1, 14.5, UV-light. For discussion see http://terms.tdwg.org/wiki/dwc:measurementValue.

measurementAccuracyProperty
Identifierhttp://rs.tdwg.org/dwc/terms/measurementAccuracy
DefinitionThe description of the potential error associated with the measurementValue.
CommentsExamples: 0.01, normal distribution with variation of 2 m. For discussion see http://terms.tdwg.org/wiki/dwc:measurementAccuracy.

measurementUnitProperty
Identifierhttp://rs.tdwg.org/dwc/terms/measurementUnit
DefinitionThe units associated with the measurementValue.
CommentsRecommended best practice is to use the International System of Units (SI). Examples: mm, C, km, ha. For discussion see http://terms.tdwg.org/wiki/dwc:measurementUnit.

measurementDeterminedByProperty
Identifierhttp://rs.tdwg.org/dwc/terms/measurementDeterminedBy
DefinitionA list (concatenated and separated) of names of people, groups, or organizations who determined the value of the MeasurementOrFact.
CommentsThe recommended best practice is to separate the values with a vertical bar ( | ). Examples: Rob Guralnick, Julie Woodruff | Eileen Lacey. For discussion see http://terms.tdwg.org/wiki/dwc:measurementDeterminedBy.

measurementDeterminedDateProperty
Identifierhttp://rs.tdwg.org/dwc/terms/measurementDeterminedDate
DefinitionThe date on which the MeasurementOrFact was made.
CommentsRecommended best practice is to use an encoding scheme, such as ISO 8601:2004(E). Examples: 1963-03-08T14:07-0600 is 8 Mar 1963 2:07pm in the time zone six hours earlier than UTC, 2009-02-20T08:40Z is 20 Feb 2009 8:40am UTC, 1809-02-12 is 12 Feb 1809, 1906-06 is Jun 1906, 1971 is just that year, 2007-03-01T13:00:00Z/2008-05-11T15:30:00Z is the interval between 1 Mar 2007 1pm UTC and 11 May 2008 3:30pm UTC, 2007-11-13/15 is the interval between 13 Nov 2007 and 15 Nov 2007. For discussion see http://terms.tdwg.org/wiki/dwc:measurementDeterminedDate.

measurementMethodProperty
Identifierhttp://rs.tdwg.org/dwc/terms/measurementMethod
DefinitionA description of or reference to (publication, URI) the method or protocol used to determine the measurement, fact, characteristic, or assertion.
CommentsExamples: minimum convex polygon around burrow entrances for a home range area, barometric altimeter for an elevation. For discussion see http://terms.tdwg.org/wiki/dwc:measurementMethod.

measurementRemarksProperty
Identifierhttp://rs.tdwg.org/dwc/terms/measurementRemarks
DefinitionComments or notes accompanying the MeasurementOrFact.
CommentsExample: tip of tail missing. For discussion see http://terms.tdwg.org/wiki/dwc:measurementRemarks.

ResourceRelationship

ResourceRelationshipClass
Identifierhttp://rs.tdwg.org/dwc/terms/ResourceRelationship
DefinitionA relationship of one rdfs:Resource (http://www.w3.org/2000/01/rdf-schema#Resource) to another.
CommentsResources can be thought of as identifiable records or instances of classes and may include, but need not be limited to Occurrences, Organisms, MaterialSamples, Events, Locations, GeologicalContexts, Identifications, or Taxa. Example: An instance of an Organism is the mother of another instance of an Organism. For discussion see http://terms.tdwg.org/wiki/dwc:ResourceRelationship.

resourceRelationshipIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/resourceRelationshipID
DefinitionAn identifier for an instance of relationship between one resource (the subject) and another (relatedResource, the object).
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:resourceRelationshipID.

resourceIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/resourceID
DefinitionAn identifier for the resource that is the subject of the relationship.
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:resourceID.

relatedResourceIDProperty
Identifierhttp://rs.tdwg.org/dwc/terms/relatedResourceID
DefinitionAn identifier for a related resource (the object, rather than the subject of the relationship).
CommentsFor discussion see http://terms.tdwg.org/wiki/dwc:relatedResourceID.

relationshipOfResourceProperty
Identifierhttp://rs.tdwg.org/dwc/terms/relationshipOfResource
DefinitionThe relationship of the resource identified by relatedResourceID to the subject (optionally identified by the resourceID).
CommentsRecommended best practice is to use a controlled vocabulary. Examples: duplicate of, mother of, endoparasite of, host to, sibling of, valid synonym of, located within. For discussion see http://terms.tdwg.org/wiki/dwc:relationshipOfResource.

relationshipAccordingToProperty
Identifierhttp://rs.tdwg.org/dwc/terms/relationshipAccordingTo
DefinitionThe source (person, organization, publication, reference) establishing the relationship between the two resources.
CommentsExample: Julie Woodruff. For discussion see http://terms.tdwg.org/wiki/dwc:relationshipAccordingTo.

relationshipEstablishedDateProperty
Identifierhttp://rs.tdwg.org/dwc/terms/relationshipEstablishedDate
DefinitionThe date-time on which the relationship between the two resources was established.
CommentsRecommended best practice is to use an encoding scheme, such as ISO 8601:2004(E). Examples: 1963-03-08T14:07-0600 is 8 Mar 1963 2:07pm in the time zone six hours earlier than UTC, 2009-02-20T08:40Z is 20 Feb 2009 8:40am UTC, 1809-02-12 is 12 Feb 1809, 1906-06 is Jun 1906, 1971 is just that year, 2007-03-01T13:00:00Z/2008-05-11T15:30:00Z is the interval between 1 Mar 2007 1pm UTC and 11 May 2008 3:30pm UTC, 2007-11-13/15 is the interval between 13 Nov 2007 and 15 Nov 2007. For discussion see http://terms.tdwg.org/wiki/dwc:relationshipEstablishedDate.

relationshipRemarksProperty
Identifierhttp://rs.tdwg.org/dwc/terms/relationshipRemarks
DefinitionComments or notes about the relationship between the two resources.
CommentsExamples: mother and offspring collected from the same nest, pollinator captured in the act. For discussion see http://terms.tdwg.org/wiki/dwc:relationshipRemarks.

UseWithIRI

UseWithIRIClass
Identifierhttp://rs.tdwg.org/dwc/terms/attributes/UseWithIRI
DefinitionThe category of terms that are recommended to have an IRI as a value.
CommentsA utility class to organize the dwciri: terms.

behaviorProperty
Identifierhttp://rs.tdwg.org/dwc/iri/behavior
DefinitionA description of the behavior shown by the subject at the time the Occurrence was recorded.
Comments

dataGeneralizationsProperty
Identifierhttp://rs.tdwg.org/dwc/iri/dataGeneralizations
DefinitionActions taken to make the shared data less specific or complete than in its original form. Suggests that alternative data of higher quality may be available on request.
Comments

dispositionProperty
Identifierhttp://rs.tdwg.org/dwc/iri/disposition
DefinitionThe current state of a specimen with respect to the collection identified in collectionCode or collectionID.
Comments

earliestGeochronologicalEraProperty
Identifierhttp://rs.tdwg.org/dwc/iri/earliestGeochronologicalEra
DefinitionUse to link a dwc:GeologicalContext instance to chronostratigraphic time periods at the lowest possible level in a standardized hierarchy. Use this property to point to the earliest possible geological time period from which the cataloged item was collected.
CommentsRecommended best practice is to use an IRI from a controlled vocabulary. A ""convenience property"" that replaces Darwin Core literal-value terms related to geological context. See Section 2.7.6 of the Darwin Core RDF Guide for details.

establishmentMeansProperty
Identifierhttp://rs.tdwg.org/dwc/iri/establishmentMeans
DefinitionThe process by which the biological individual(s) represented in the Occurrence became established at the location.
CommentsRecommended best practice is to use a controlled vocabulary.

fieldNotesProperty
Identifierhttp://rs.tdwg.org/dwc/iri/fieldNotes
DefinitionOne of a) an indicator of the existence of, b) a reference to (publication, URI), or c) the text of notes taken in the field about the Event.
CommentsThe subject is a dwc:Event instance and the object is a (possibly IRI-identified) resource that is the field notes.

fieldNumberProperty
Identifierhttp://rs.tdwg.org/dwc/iri/fieldNumber
DefinitionAn identifier given to the event in the field. Often serves as a link between field notes and the Event.
CommentsThe subject is a (possibly IRI-identified) resource that is the field notes and the object is a dwc:Event instance.

footprintSRSProperty
Identifierhttp://rs.tdwg.org/dwc/iri/footprintSRS
DefinitionA Well-Known Text (WKT) representation of the Spatial Reference System (SRS) for the footprintWKT of the Location. Do not use this term to describe the SRS of the decimalLatitude and decimalLongitude, even if it is the same as for the footprintWKT - use the geodeticDatum instead.
Comments

footprintWKTProperty
Identifierhttp://rs.tdwg.org/dwc/iri/footprintWKT
DefinitionA Well-Known Text (WKT) representation of the shape (footprint, geometry) that defines the Location. A Location may have both a point-radius representation (see decimalLatitude) and a footprint representation, and they may differ from each other.
Comments

fromLithostratigraphicUnitProperty
Identifierhttp://rs.tdwg.org/dwc/iri/fromLithostratigraphicUnit
DefinitionUse to link a dwc:GeologicalContext instance to an IRI-identified lithostratigraphic unit at the lowest possible level in a hierarchy.
CommentsRecommended best practice is to use an IRI from a controlled vocabulary. A "convenience property" that replaces Darwin Core literal-value terms related to geological context. See Section 2.7.7 of the Darwin Core RDF Guide for details.

geodeticDatumProperty
Identifierhttp://rs.tdwg.org/dwc/iri/geodeticDatum
DefinitionThe ellipsoid, geodetic datum, or spatial reference system (SRS) upon which the geographic coordinates given in decimalLatitude and decimalLongitude as based.
CommentsRecommended best practice is use the EPSG code as a controlled vocabulary to provide an SRS, if known. Otherwise use a controlled vocabulary for the name or code of the geodetic datum, if known. Otherwise use a controlled vocabulary for the name or code of the ellipsoid, if known. If none of these is known, use the value unknown.

georeferencedByProperty
Identifierhttp://rs.tdwg.org/dwc/iri/georeferencedBy
DefinitionA person, group, or organization who determined the georeference (spatial representation) for the Location.
Comments

georeferenceProtocolProperty
Identifierhttp://rs.tdwg.org/dwc/iri/georeferenceProtocol
DefinitionA description or reference to the methods used to determine the spatial footprint, coordinates, and uncertainties.
Comments

georeferenceSourcesProperty
Identifierhttp://rs.tdwg.org/dwc/iri/georeferenceSources
DefinitionA map, gazetteer, or other resource used to georeference the Location.
Comments

georeferenceVerificationStatusProperty
Identifierhttp://rs.tdwg.org/dwc/iri/georeferenceVerificationStatus
DefinitionA categorical description of the extent to which the georeference has been verified to represent the best possible spatial description.
CommentsRecommended best practice is to use a controlled vocabulary.

habitatProperty
Identifierhttp://rs.tdwg.org/dwc/iri/habitat
DefinitionA category or description of the habitat in which the Event occurred.
Comments

identificationQualifierProperty
Identifierhttp://rs.tdwg.org/dwc/iri/identificationQualifier
DefinitionA controlled value to express the determiner's doubts about the Identification.
Comments

identificationVerificationStatusProperty
Identifierhttp://rs.tdwg.org/dwc/iri/identificationVerificationStatus
DefinitionA categorical indicator of the extent to which the taxonomic identification has been verified to be correct.
CommentsRecommended best practice is to use a controlled vocabulary such as that used in HISPID/ABCD.

identifiedByProperty
Identifierhttp://rs.tdwg.org/dwc/iri/identifiedBy
DefinitionA person, group, or organization who assigned the Taxon to the subject.
Comments

inCollectionProperty
Identifierhttp://rs.tdwg.org/dwc/iri/inCollection
DefinitionUse to link any subject resource that is part of a collection to the collection containing the resource.
CommentsRecommended best practice is to use an IRI from a controlled registry. A ""convenience property"" that replaces literal-value terms related to collections and institutions. See Section 2.7.3 of the Darwin Core RDF Guide for details.

inDatasetProperty
Identifierhttp://rs.tdwg.org/dwc/iri/inDataset
DefinitionUse to link a subject dataset record to the dataset which contains it.
CommentsA string literal name of the dataset can be provided using the term dwc:datasetName. See the Darwin Core RDF Guide for details.

inDescribedPlaceProperty
Identifierhttp://rs.tdwg.org/dwc/iri/inDescribedPlace
DefinitionUse to link a dcterms:Location instance subject to the lowest level standardized hierarchically-described resource.
CommentsRecommended best practice is to use an IRI from a controlled registry. A ""convenience property"" that replaces Darwin Core literal-value terms related to locations. See Section 2.7.5 of the Darwin Core RDF Guide for details.

informationWithheldProperty
Identifierhttp://rs.tdwg.org/dwc/iri/informationWithheld
DefinitionAdditional information that exists, but that has not been shared in the given record.
Comments

latestGeochronologicalEraProperty
Identifierhttp://rs.tdwg.org/dwc/iri/latestGeochronologicalEra
DefinitionUse to link a dwc:GeologicalContext instance to chronostratigraphic time periods at the lowest possible level in a standardized hierarchy. Use this property to point to the latest possible geological time period from which the cataloged item was collected.
CommentsRecommended best practice is to use an IRI from a controlled vocabulary. A ""convenience property"" that replaces Darwin Core literal-value terms related to geological context. See Section 2.7.6 of the Darwin Core RDF Guide for details.

lifeStageProperty
Identifierhttp://rs.tdwg.org/dwc/iri/lifeStage
DefinitionThe age class or life stage of the biological individual(s) at the time the Occurrence was recorded.
CommentsRecommended best practice is to use a controlled vocabulary.

locationAccordingToProperty
Identifierhttp://rs.tdwg.org/dwc/iri/locationAccordingTo
DefinitionInformation about the source of this Location information. Could be a publication (gazetteer), institution, or team of individuals.
Comments

measurementDeterminedByProperty
Identifierhttp://rs.tdwg.org/dwc/iri/measurementDeterminedBy
DefinitionA person, group, or organization who determined the value of the MeasurementOrFact.
Comments

measurementMethodProperty
Identifierhttp://rs.tdwg.org/dwc/iri/measurementMethod
DefinitionThe method or protocol used to determine the measurement, fact, characteristic, or assertion.
Comments

measurementTypeProperty
Identifierhttp://rs.tdwg.org/dwc/iri/measurementType
DefinitionThe nature of the measurement, fact, characteristic, or assertion.
CommentsRecommended best practice is to use a controlled vocabulary.

measurementUnitProperty
Identifierhttp://rs.tdwg.org/dwc/iri/measurementUnit
DefinitionThe units associated with the measurementValue.
CommentsRecommended best practice is to use the International System of Units (SI).

occurrenceStatusProperty
Identifierhttp://rs.tdwg.org/dwc/iri/occurrenceStatus
DefinitionA statement about the presence or absence of a Taxon at a Location.
CommentsRecommended best practice is to use a controlled vocabulary.

organismQuantityTypeProperty
Identifierhttp://rs.tdwg.org/dwc/iri/organismQuantityType
DefinitionThe type of quantification system used for the quantity of organisms.
CommentsAn organismQuantityType must have a corresponding organismQuantity.

preparationsProperty
Identifierhttp://rs.tdwg.org/dwc/iri/preparations
DefinitionA preparation or preservation method for a specimen.
Comments

recordedByProperty
Identifierhttp://rs.tdwg.org/dwc/iri/recordedBy
DefinitionA person, group, or organization responsible for recording the original Occurrence.
Comments

recordNumberProperty
Identifierhttp://rs.tdwg.org/dwc/iri/recordNumber
DefinitionAn identifier given to the Occurrence at the time it was recorded. Often serves as a link between field notes and an Occurrence record, such as a specimen collector's number.
CommentsThe subject is an occurrence and and the object is a (possibly IRI-identified) resource that is the field notes.

reproductiveConditionProperty
Identifierhttp://rs.tdwg.org/dwc/iri/reproductiveCondition
DefinitionThe reproductive condition of the biological individual(s) represented in the Occurrence.
CommentsRecommended best practice is to use a controlled vocabulary.

sampleSizeUnitProperty
Identifierhttp://rs.tdwg.org/dwc/iri/sampleSizeUnit
DefinitionThe unit of measurement of the size (time duration, length, area, or volume) of a sample in a sampling event.
CommentsA sampleSizeUnit must have a corresponding sampleSizeValue. Recommended best practice is to use a controlled vocabulary such as the Ontology of Units of Measure http://www.wurvoc.org/vocabularies/om-1.8/ of SI units, derived units, or other non-SI units accepted for use within the SI Examples: minute, hour, day, litre

samplingProtocolProperty
Identifierhttp://rs.tdwg.org/dwc/iri/samplingProtocol
DefinitionThe method or protocol used during an Event.
Comments

sexProperty
Identifierhttp://rs.tdwg.org/dwc/iri/sex
DefinitionThe sex of the biological individual(s) represented in the Occurrence.
CommentsRecommended best practice is to use a controlled vocabulary.

toTaxonProperty
Identifierhttp://rs.tdwg.org/dwc/iri/toTaxon
DefinitionUse to link a dwc:Identification instance subject to a taxonomic entity such as a taxon, taxon concept, or taxon name use.
CommentsA "convenience property" that replaces Darwin Core literal-value terms related to taxonomic entities. See Section 2.7.4 of the Darwin Core RDF Guide for details.

typeStatusProperty
Identifierhttp://rs.tdwg.org/dwc/iri/typeStatus
DefinitionA nomenclatural type (type status, typified scientific name, publication) applied to the subject.
Comments

verbatimCoordinateSystemProperty
Identifierhttp://rs.tdwg.org/dwc/iri/verbatimCoordinateSystem
DefinitionThe spatial coordinate system for the verbatimLatitude and verbatimLongitude or the verbatimCoordinates of the Location.
CommentsRecommended best practice is to use a controlled vocabulary.

verbatimSRSProperty
Identifierhttp://rs.tdwg.org/dwc/iri/verbatimSRS
DefinitionThe ellipsoid, geodetic datum, or spatial reference system (SRS) upon which coordinates given in verbatimLatitude and verbatimLongitude, or verbatimCoordinates are based.
CommentsRecommended best practice is use the EPSG code as a controlled vocabulary to provide an SRS, if known. Otherwise use a controlled vocabulary for the name or code of the geodetic datum, if known. Otherwise use a controlled vocabulary for the name or code of the ellipsoid, if known. If none of these is known, use the value unknown.