Title: Core terms defined by Darwin Core
Date version issued: 2025年06月12日
Date created: 2008年11月19日
Part of TDWG Standard: http://www.tdwg.org/standards/450
This version: http://rs.tdwg.org/dwc/version/terms/2025-06-12
Latest version: http://rs.tdwg.org/dwc/terms/
Abstract: This term list includes all currently valid terms that have been defined in the core Darwin Core namespace dwc:. To comment on this schema, please create a new issue in https://github.com/tdwg/dwc/issues
Namespace IRI: http://rs.tdwg.org/dwc/terms/
Preferred namespace abbreviation: dwc:

Note: This is the list of core terms defined by Darwin Core. For the Darwin Core Quick Reference Guide, please bookmark https://dwc.tdwg.org/terms/

Table of Contents

1 Introduction

This is a list of terms that may be part of a TDWG vocabulary. If the terms on this list are defined by TDWG, the list corresponds to terms in a namespace whose IRI is listed in the header. In the case where the terms are borrowed from a non-TDWG vocabulary, the list includes terms that are "borrowed" for inclusion in a TDWG vocabulary. The list includes all "current" terms on the list, which may or may not be recommended for use. Terms that are no longer recommended for use may have specified replacements - see the metadata about that specific term.

For more information about the structure and version model of TDWG vocabularies, see the TDWG Standards Documentation Specification.

2 List versions

List versions are "snapshots" of the term list at a particular point in time. To examine specific historical versions of this list, click on one of the links below.

3 List distributions

This term list is available in the formats or distribution methods listed in the table below. Please note that distribution access URLs may be subject to change over time. Therefore, it is preferable to request the abstract IRI of the resources and request the desired Content-type through content negotiation.

Description IRI Access URL
HTML file (this document) http://rs.tdwg.org/dwc/terms.htm http://rs.tdwg.org/dwc/terms.htm
RDF/Turtle http://rs.tdwg.org/dwc/terms.ttl http://rs.tdwg.org/dwc/terms.ttl
RDF/XML http://rs.tdwg.org/dwc/terms.rdf http://rs.tdwg.org/dwc/terms.rdf
JSON-LD http://rs.tdwg.org/dwc/terms.json http://rs.tdwg.org/dwc/terms.json

4 Terms that are members of this list

Term Name: dwc:AcceptedTaxon
Label: Accepted Taxon
Term IRI: http://rs.tdwg.org/dwc/terms/AcceptedTaxon
Term version IRI: http://rs.tdwg.org/dwc/terms/version/AcceptedTaxon-2008年11月19日
Modified: 2009年04月24日
Definition: The currently valid (zoological) or accepted (botanical) name for the ScientificName.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/acceptedTaxonName

Term Name: dwc:AcceptedTaxonID
Label: Accepted Taxon ID
Term IRI: http://rs.tdwg.org/dwc/terms/AcceptedTaxonID
Term version IRI: http://rs.tdwg.org/dwc/terms/version/AcceptedTaxonID-2009年01月21日
Modified: 2009年04月24日
Definition: A global unique identifier for the parent to the AcceptedTaxon.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/acceptedTaxonNameID

Term Name: dwc:AccessConstraints
Label: Access Constraints
Term IRI: http://rs.tdwg.org/dwc/terms/AccessConstraints
Term version IRI: http://rs.tdwg.org/dwc/terms/version/AccessConstraints-2008年11月19日
Modified: 2009年09月21日
Definition: A description of constraints on the use of the data as shared or access to further data that is not shared.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://purl.org/dc/terms/accessRights

Term Name: dwc:CatalogNumberNumeric
Label: Catalog Number Numeric
Term IRI: http://rs.tdwg.org/dwc/terms/CatalogNumberNumeric
Term version IRI: http://rs.tdwg.org/dwc/terms/version/CatalogNumberNumeric-2008年11月19日
Modified: 2009年04月24日
Definition: The numeric value of the catalogNumber, used to facilitate numerical sorting and searching by ranges.
Type: Property
Note: This term is no longer recommended for use.
Replaces: http://digir.net/schema/conceptual/darwin/2003/1.0/CatalogNumberNumeric

Term Name: dwc:Dataset
Label: Dataset
Term IRI: http://rs.tdwg.org/dwc/terms/Dataset
Term version IRI: http://rs.tdwg.org/dwc/terms/version/Dataset-2008年11月19日
Modified: 2009年09月11日
Definition: The category of information pertaining to a logical set of records.
Type: Class
Note: This term is no longer recommended for use.

Term Name: dwc:DwCType
Label: Darwin Core Type
Term IRI: http://rs.tdwg.org/dwc/terms/DwCType
Term version IRI: http://rs.tdwg.org/dwc/terms/version/DwCType-2008年11月19日
Modified: 2014年10月23日
Definition: The set of classes specified by the Darwin Core Type Vocabulary, used to categorize the nature or genre of the resource.
Type: http://purl.org/dc/dcam/VocabularyEncodingScheme
Note: This term is no longer recommended for use.

Term Name: dwc:EarliestDateCollected
Label: Earliest Date Collected
Term IRI: http://rs.tdwg.org/dwc/terms/EarliestDateCollected
Term version IRI: http://rs.tdwg.org/dwc/terms/version/EarliestDateCollected-2008年11月19日
Modified: 2009年04月24日
Definition: The earliest date-time in a period during which a event occurred. If the event is recorded as occurring at a single date-time, populate both EarliestDateCollected and LatestDateCollected with the same value. Recommended best practice is to use an encoding scheme, such as ISO 8601:2004(E).
Type: Property
Note: This term is no longer recommended for use.
Replaces: http://rs.tdwg.org/dwc/dwcore/EarliestDateCollected
Is replaced by: http://rs.tdwg.org/dwc/terms/eventDate

Term Name: dwc:EndTimeOfDay
Label: End Time of Day
Term IRI: http://rs.tdwg.org/dwc/terms/EndTimeOfDay
Term version IRI: http://rs.tdwg.org/dwc/terms/version/EndTimeOfDay-2008年11月19日
Modified: 2009年04月24日
Definition: The time of day when the event ended, expressed as decimal hours from midnight, local time.
Type: Property
Note: This term is no longer recommended for use.
Replaces: http://www.iobis.org/obis/EndTimeOfDay
Is replaced by: http://rs.tdwg.org/dwc/terms/eventTime

Term Name: dwc:Event
Label: Event
Term IRI: http://rs.tdwg.org/dwc/terms/Event
Term version IRI: http://rs.tdwg.org/dwc/terms/version/Event-2023年09月18日
Modified: 2023年09月18日
Definition: An action that occurs at some location during some time.
Type: Class
Replaces: http://rs.tdwg.org/dwc/terms/SamplingEvent

Term Name: dwc:EventAttribute
Label: Event Attribute
Term IRI: http://rs.tdwg.org/dwc/terms/EventAttribute
Term version IRI: http://rs.tdwg.org/dwc/terms/version/EventAttribute-2008年11月19日
Modified: 2009年04月24日
Definition: Container class for information about attributes related to a given sampling event.
Type: Class
Note: This term is no longer recommended for use.

Term Name: dwc:EventAttributeAccuracy
Label: Event Attribute Accuracy
Term IRI: http://rs.tdwg.org/dwc/terms/EventAttributeAccuracy
Term version IRI: http://rs.tdwg.org/dwc/terms/version/EventAttributeAccuracy-2009年01月18日
Modified: 2009年04月24日
Definition: The description of the error associated with the EventAttributeValue.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/eventMeasurementAccuracy

Term Name: dwc:EventAttributeDeterminedBy
Label: Event Attribute Determined By
Term IRI: http://rs.tdwg.org/dwc/terms/EventAttributeDeterminedBy
Term version IRI: http://rs.tdwg.org/dwc/terms/version/EventAttributeDeterminedBy-2009年01月23日
Modified: 2009年04月24日
Definition: The agent responsible for having determined the value of the measurement or characteristic of the sampling event.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/eventMeasurementDeterminedBy

Term Name: dwc:EventAttributeDeterminedDate
Label: Event Attribute Determined Date
Term IRI: http://rs.tdwg.org/dwc/terms/EventAttributeDeterminedDate
Term version IRI: http://rs.tdwg.org/dwc/terms/version/EventAttributeDeterminedDate-2009年01月23日
Modified: 2009年04月24日
Definition: The date on which the the measurement or characteristic of the sampling event was made.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/eventMeasurementDeterminedDate

Term Name: dwc:EventAttributeID
Label: Event Attribute ID
Term IRI: http://rs.tdwg.org/dwc/terms/EventAttributeID
Term version IRI: http://rs.tdwg.org/dwc/terms/version/EventAttributeID-2008年11月19日
Modified: 2009年04月24日
Definition: An identifier for the event attribute. May be a global unique identifier or an identifier specific to the data set.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/eventMeasurementID

Term Name: dwc:EventAttributeRemarks
Label: Event Attribute Remarks
Term IRI: http://rs.tdwg.org/dwc/terms/EventAttributeRemarks
Term version IRI: http://rs.tdwg.org/dwc/terms/version/EventAttributeRemarks-2008年11月19日
Modified: 2009年04月24日
Definition: Comments or notes accompanying the measurement or characteristic of the sampling event.
Type: Property
Note: This term is no longer recommended for use.

Term Name: dwc:EventAttributeType
Label: Event Attribute Type
Term IRI: http://rs.tdwg.org/dwc/terms/EventAttributeType
Term version IRI: http://rs.tdwg.org/dwc/terms/version/EventAttributeType-2008年11月19日
Modified: 2009年04月24日
Definition: The nature of the measurement or characteristic of the sampling event. Recommended best practice is to use a controlled vocabulary.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/SamplingAttributeType
Is replaced by: http://rs.tdwg.org/dwc/terms/eventMeasurementType

Term Name: dwc:EventAttributeUnit
Label: Event Attribute Unit
Term IRI: http://rs.tdwg.org/dwc/terms/EventAttributeUnit
Term version IRI: http://rs.tdwg.org/dwc/terms/version/EventAttributeUnit-2008年11月19日
Modified: 2009年04月24日
Definition: The units for the value of the measurement or characteristic of the sampling event. Recommended best practice is to use International System of Units (SI) units.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/eventMeasurementUnit

Term Name: dwc:EventAttributeValue
Label: Event Attribute
Term IRI: http://rs.tdwg.org/dwc/terms/EventAttributeValue
Term version IRI: http://rs.tdwg.org/dwc/terms/version/EventAttributeValue-2008年11月19日
Modified: 2009年04月24日
Definition: The value of the measurement or characteristic of the sampling event.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/eventMeasurementValue

Term Name: dwc:EventMeasurement
Label: Event Measurement
Term IRI: http://rs.tdwg.org/dwc/terms/EventMeasurement
Term version IRI: http://rs.tdwg.org/dwc/terms/version/EventMeasurement-2008年11月19日
Modified: 2009年10月09日
Definition: The category of information pertaining to measurements associated with an event.
Type: Class
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/MeasurementOrFact

Term Name: dwc:FossilSpecimen
Label: Fossil Specimen
Term IRI: http://rs.tdwg.org/dwc/terms/FossilSpecimen
Term version IRI: http://rs.tdwg.org/dwc/terms/version/FossilSpecimen-2023年09月18日
Modified: 2023年09月18日
Definition: A preserved specimen that is a fossil.
Type: Class
Replaces: http://rs.tdwg.org/dwc/dwctype/FossilSpecimen

Term Name: dwc:Generalizations
Label: Generalizations
Term IRI: http://rs.tdwg.org/dwc/terms/Generalizations
Term version IRI: http://rs.tdwg.org/dwc/terms/version/Generalizations-2008年11月19日
Modified: 2009年04月24日
Definition: Actions taken to make the data as shared less specific or complete than in its original form. Suggests that alternative data of highly quality may be available on request.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/dataGeneralizations

Term Name: dwc:GeologicalContext
Label: Geological Context
Term IRI: http://rs.tdwg.org/dwc/terms/GeologicalContext
Term version IRI: http://rs.tdwg.org/dwc/terms/version/GeologicalContext-2023年09月18日
Modified: 2023年09月18日
Definition: Geological information, such as stratigraphy, that qualifies a region or place.
Type: Class

Term Name: dwc:HigherTaxon
Label: Higher Taxon
Term IRI: http://rs.tdwg.org/dwc/terms/HigherTaxon
Term version IRI: http://rs.tdwg.org/dwc/terms/version/HigherTaxon-2009年01月21日
Modified: 2009年08月24日
Definition: A list (concatenated and separated) of the names for the taxonomic ranks less specific than the ScientificName.
Type: Property
Note: This term is no longer recommended for use.

Term Name: dwc:HigherTaxonID
Label: Higher Taxon ID
Term IRI: http://rs.tdwg.org/dwc/terms/HigherTaxonID
Term version IRI: http://rs.tdwg.org/dwc/terms/version/HigherTaxonID-2009年01月21日
Modified: 2009年08月24日
Definition: A global unique identifier for the parent to the taxon.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/higherTaxonNameID

Term Name: dwc:HumanObservation
Label: Human Observation
Term IRI: http://rs.tdwg.org/dwc/terms/HumanObservation
Term version IRI: http://rs.tdwg.org/dwc/terms/version/HumanObservation-2023年09月18日
Modified: 2023年09月18日
Definition: An output of a human observation process.
Type: Class
Replaces: http://rs.tdwg.org/dwc/dwctype/HumanObservation

Term Name: dwc:Identification
Label: Identification
Term IRI: http://rs.tdwg.org/dwc/terms/Identification
Term version IRI: http://rs.tdwg.org/dwc/terms/version/Identification-2023年09月18日
Modified: 2023年09月18日
Definition: A taxonomic determination (e.g., the assignment to a dwc:Taxon).
Type: Class

Term Name: dwc:LatestDateCollected
Label: Latest Date Collected
Term IRI: http://rs.tdwg.org/dwc/terms/LatestDateCollected
Term version IRI: http://rs.tdwg.org/dwc/terms/version/LatestDateCollected-2008年11月19日
Modified: 2009年04月24日
Definition: The latest date-time in a period during which a event occurred. If the event is recorded as occurring at a single date-time, populate both EarliestDateCollected and LatestDateCollected with the same value. Recommended best practice is to use an encoding scheme, such as ISO 8601:2004(E).
Type: Property
Note: This term is no longer recommended for use.
Replaces: http://rs.tdwg.org/dwc/dwcore/LatestDateCollected
Is replaced by: http://rs.tdwg.org/dwc/terms/eventDate

Term Name: dwc:LivingSpecimen
Label: Living Specimen
Term IRI: http://rs.tdwg.org/dwc/terms/LivingSpecimen
Term version IRI: http://rs.tdwg.org/dwc/terms/version/LivingSpecimen-2023年09月18日
Modified: 2023年09月18日
Definition: A specimen that is alive.
Type: Class
Replaces: http://rs.tdwg.org/dwc/dwctype/LivingSpecimen

Term Name: dwc:MachineObservation
Label: Machine Observation
Term IRI: http://rs.tdwg.org/dwc/terms/MachineObservation
Term version IRI: http://rs.tdwg.org/dwc/terms/version/MachineObservation-2023年09月18日
Modified: 2023年09月18日
Definition: An output of a machine observation process.
Type: Class
Replaces: http://rs.tdwg.org/dwc/dwctype/MachineObservation

Term Name: dwc:MaterialCitation
Label: Material Citation
Term IRI: http://rs.tdwg.org/dwc/terms/MaterialCitation
Term version IRI: http://rs.tdwg.org/dwc/terms/version/MaterialCitation-2023年09月18日
Modified: 2023年09月18日
Definition: A reference to or citation of one, a part of, or multiple specimens in scholarly publications.
Type: Class

Term Name: dwc:MaterialEntity
Label: Material Entity
Term IRI: http://rs.tdwg.org/dwc/terms/MaterialEntity
Term version IRI: http://rs.tdwg.org/dwc/terms/version/MaterialEntity-2023年09月13日
Modified: 2023年09月13日
Definition: An entity that can be identified, exists for some period of time, and consists in whole or in part of physical matter while it exists.
Type: Class

Term Name: dwc:MaterialSample
Label: Material Sample
Term IRI: http://rs.tdwg.org/dwc/terms/MaterialSample
Term version IRI: http://rs.tdwg.org/dwc/terms/version/MaterialSample-2023年09月13日
Modified: 2023年09月13日
Definition: A material entity that represents an entity of interest in whole or in part.
Type: Class
Replaces: http://rs.tdwg.org/dwc/dwctype/MaterialSample

Term Name: dwc:MeasurementOrFact
Label: Measurement Or Fact
Term IRI: http://rs.tdwg.org/dwc/terms/MeasurementOrFact
Term version IRI: http://rs.tdwg.org/dwc/terms/version/MeasurementOrFact-2023年09月13日
Modified: 2023年09月13日
Definition: A measurement of or fact about an rdfs:Resource (http://www.w3.org/2000/01/rdf-schema#Resource).
Type: Class
Replaces: http://rs.tdwg.org/dwc/terms/EventMeasurement

Term Name: dwc:Occurrence
Label: Occurrence
Term IRI: http://rs.tdwg.org/dwc/terms/Occurrence
Term version IRI: http://rs.tdwg.org/dwc/terms/version/Occurrence-2023年09月18日
Modified: 2023年09月18日
Definition: An existence of a dwc:Organism at a particular place at a particular time.
Type: Class
Replaces: http://rs.tdwg.org/dwc/terms/Sample

Term Name: dwc:OccurrenceMeasurement
Label: Occurrence Measurement
Term IRI: http://rs.tdwg.org/dwc/terms/OccurrenceMeasurement
Term version IRI: http://rs.tdwg.org/dwc/terms/version/OccurrenceMeasurement-2008年11月19日
Modified: 2009年10月09日
Definition: The category of information pertaining to measurements accociated with an occurrence.
Type: Class
Note: This term is no longer recommended for use.

Term Name: dwc:Organism
Label: Organism
Term IRI: http://rs.tdwg.org/dwc/terms/Organism
Term version IRI: http://rs.tdwg.org/dwc/terms/version/Organism-2023年09月18日
Modified: 2023年09月18日
Definition: A particular organism or defined group of organisms considered to be taxonomically homogeneous.
Type: Class

Term Name: dwc:PreservedSpecimen
Label: Preserved Specimen
Term IRI: http://rs.tdwg.org/dwc/terms/PreservedSpecimen
Term version IRI: http://rs.tdwg.org/dwc/terms/version/PreservedSpecimen-2023年09月18日
Modified: 2023年09月18日
Definition: A specimen that has been preserved.
Type: Class
Replaces: http://rs.tdwg.org/dwc/dwctype/PreservedSpecimen

Term Name: dwc:PreviousIdentifications
Label: Previous Identifications
Term IRI: http://rs.tdwg.org/dwc/terms/PreviousIdentifications
Term version IRI: http://rs.tdwg.org/dwc/terms/version/PreviousIdentifications-2008年11月19日
Modified: 2009年04月24日
Definition: A list (concatenated and separated) of previous ScientificNames to which the sample was identified.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/previousIdentifications

Term Name: dwc:RelatedBasisOfRecord
Label: Related Basis of Record
Term IRI: http://rs.tdwg.org/dwc/terms/RelatedBasisOfRecord
Term version IRI: http://rs.tdwg.org/dwc/terms/version/RelatedBasisOfRecord-2008年11月19日
Modified: 2009年01月26日
Definition: The nature of the related resource. Recommended best practice is to use the same controlled vocabulary as for basisOfRecord.
Type: Property
Note: This term is no longer recommended for use.

Term Name: dwc:ResourceRelationship
Label: Resource Relationship
Term IRI: http://rs.tdwg.org/dwc/terms/ResourceRelationship
Term version IRI: http://rs.tdwg.org/dwc/terms/version/ResourceRelationship-2023年09月13日
Modified: 2023年09月13日
Definition: A relationship of one rdfs:Resource (http://www.w3.org/2000/01/rdf-schema#Resource) to another.
Type: Class

Term Name: dwc:Sample
Label: Sample
Term IRI: http://rs.tdwg.org/dwc/terms/Sample
Term version IRI: http://rs.tdwg.org/dwc/terms/version/Sample-2008年11月19日
Modified: 2009年04月29日
Definition: Container class for information about the results of a sampling event (specimen, observation, etc.)
Type: Class
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/Occurrence

Term Name: dwc:SampleAttribute
Label: Sample Attribute
Term IRI: http://rs.tdwg.org/dwc/terms/SampleAttribute
Term version IRI: http://rs.tdwg.org/dwc/terms/version/SampleAttribute-2008年11月19日
Modified: 2009年04月29日
Definition: Container class for information about attributes related to a given sample.
Type: Class
Note: This term is no longer recommended for use.

Term Name: dwc:SampleAttributeAccuracy
Label: Sample Attribute Accuracy
Term IRI: http://rs.tdwg.org/dwc/terms/SampleAttributeAccuracy
Term version IRI: http://rs.tdwg.org/dwc/terms/version/SampleAttributeAccuracy-2009年01月18日
Modified: 2009年04月29日
Definition: The description of the error associated with the SampleAttributeValue.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/occurrenceMeasurementAccuracy

Term Name: dwc:SampleAttributeDeterminedBy
Label: Sample Attribute Determined By
Term IRI: http://rs.tdwg.org/dwc/terms/SampleAttributeDeterminedBy
Term version IRI: http://rs.tdwg.org/dwc/terms/version/SampleAttributeDeterminedBy-2009年01月23日
Modified: 2009年04月29日
Definition: The agent responsible for having determined the value of the measurement or characteristic of the sample.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/occurrenceMeasurementDeterminedBy

Term Name: dwc:SampleAttributeDeterminedDate
Label: Sample Attribute Determined Date
Term IRI: http://rs.tdwg.org/dwc/terms/SampleAttributeDeterminedDate
Term version IRI: http://rs.tdwg.org/dwc/terms/version/SampleAttributeDeterminedDate-2009年01月23日
Modified: 2009年04月29日
Definition: The date on which the the measurement or characteristic of the sample was made.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/occurrenceMeasurementDeterminedDate

Term Name: dwc:SampleAttributeRemarks
Label: Sample Attribute Remarks
Term IRI: http://rs.tdwg.org/dwc/terms/SampleAttributeRemarks
Term version IRI: http://rs.tdwg.org/dwc/terms/version/SampleAttributeRemarks-2008年11月19日
Modified: 2009年04月29日
Definition: Comments or notes accompanying the measurement or characteristic of the sample.
Type: Property
Note: This term is no longer recommended for use.

AltStyle によって変換されたページ (->オリジナル) /

Term Name: dwc:SampleAttributeUnit
Label: Sample Attribute Unit
Term IRI: http://rs.tdwg.org/dwc/terms/SampleAttributeUnit
Term version IRI: http://rs.tdwg.org/dwc/terms/version/SampleAttributeUnit-2008年11月19日
Modified: 2009年04月29日
Definition: The units for the value of the measurement or characteristic of the sample. Recommended best practice is to use International System of Units (SI) units.
Type: Property
Note: This term is no longer recommended for use.
Is replaced by: http://rs.tdwg.org/dwc/terms/occurrenceMeasurementUnit