This document is intended to be an easy-to-read reference of the currently (as of 2021-07-15) recommended terms maintained as part of the [Darwin Core standard](https://www.tdwg.org/standards/dwc/) and is maintained by the [Darwin Core Maintenance Group](https://www.tdwg.org/community/dwc/).
This page is not part of the standard, but combines the normative term names and definitions with the non-normative comments and examples that are meant to help people to use the terms consistently. Capitalized terms, such as Occurrence, are Darwin Core classes, which are special category terms used to group sets of terms for convenience. Comprehensive metadata for current and obsolete terms in human readable form are found in the document [List of Darwin Core terms](../list/).
Additional [files with just the current term names](https://github.com/tdwg/dwc/tree/master/dist) and a [file with the full term history](https://github.com/tdwg/dwc/blob/master/vocabulary/term_versions.csv) can be found in the [Darwin Core repository](https://github.com/tdwg/dwc).
For inquiries about how to use Darwin Core, either enter an issue in the [Darwin Core Questions & Answers site](https://github.com/tdwg/dwc-qa/blob/master/README.md) or enter an issue in the [alternative form](https://tinyurl.com/darwin-qa), which will have the same effect. See the bottom of this document for how to [cite Darwin Core](#cite-darwin-core).
<tr><tdclass="theme-label">Definition</td><td>The nature or genre of the resource.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Must be populated with a value from the DCMI type vocabulary (<ahref="http://dublincore.org/documents/2010/10/11/dcmi-type-vocabulary/">http://dublincore.org/documents/2010/10/11/dcmi-type-vocabulary/</a>).</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>1963-03-08T14:07-0600</code> (8 Mar 1963 at 2:07pm in the time zone six hours earlier than UTC). <code>2009-02-20T08:40Z</code> (20 February 2009 8:40am UTC). <code>2018-08-29T15:19</code> (3:19pm local time on 29 August 2018). <code>1809-02-12</code> (some time during 12 February 1809). <code>1906-06</code> (some time in June 1906). <code>1971</code> (some time in the year 1971). <code>2007-03-01T13:00:00Z/2008-05-11T15:30:00Z</code> (some time during the interval between 1 March 2007 1pm UTC and 11 May 2008 3:30pm UTC). <code>1900/1909</code> (some time during the interval between the beginning of the year 1900 and the end of the year 1909). <code>2007-11-13/15</code> (some time in the interval between 13 November 2007 and 15 November 2007).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>Information about who can access the resource or an indication of its security status.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Access Rights may include information regarding access or restrictions based on privacy, security, or other policies.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>not-for-profit use only</code>, <code><ahref="https://www.fieldmuseum.org/field-museum-natural-history-conditions-and-suggested-norms-use-collections-data-and-images">https://www.fieldmuseum.org/field-museum-natural-history-conditions-and-suggested-norms-use-collections-data-and-images</a></code></td></tr>
<tr><tdclass="theme-label">Definition</td><td>A bibliographic reference for the resource as a statement indicating how this record should be cited (attributed) when used.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>From Dublin Core, "Recommended practice is to include sufficient bibliographic detail to identify the resource as unambiguously as possible." The intended usage of this term in Darwin Core is to provide the preferred way to cite the resource itself - "how to cite this record". Note that the intended usage of dcterms:references in Darwin Core, by contrast, is to point to the definitive source representation of the resource - "where to find the as-close-to-original reference, if one is available.</td></tr>
<tr><tdclass="theme-label">Examples</td><td>Occurrence example: <code>Museum of Vertebrate Zoology, UC Berkeley. MVZ Mammal Collection (Arctos). Record ID: <ahref="http://arctos.database.museum/guid/MVZ:Mamm:165861?seid=101356">http://arctos.database.museum/guid/MVZ:Mamm:165861?seid=101356</a>. Source: <ahref="http://ipt.vertnet.org:8080/ipt/resource.do?r=mvz_mammal">http://ipt.vertnet.org:8080/ipt/resource.do?r=mvz_mammal</a>.</code> Taxon example:<code><ahref="https://www.gbif.org/species/2439608">https://www.gbif.org/species/2439608</a> Source: GBIF Taxonomic Backbone</code>, Event example:<code>Rand, K.M., Logerwell, E.A. The first demersal trawl survey of benthic fish and invertebrates in the Beaufort Sea since the late 1970s. Polar Biol 34, 475–488 (2011). <ahref="https://doi.org/10.1007/s00300-010-0900-2">https://doi.org/10.1007/s00300-010-0900-2</a></code></td></tr>
<tr><tdclass="theme-label">Definition</td><td>A related resource that is referenced, cited, or otherwise pointed to by the described resource.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>From Dublin Core, "This property is intended to be used with non-literal values. This property is an inverse property of Is Referenced By." The intended usage of this term in Darwin Core is to point to the definitive source representation of the resource (e.g.,Taxon, Occurrence, Event in Darwin Core), if one is available. Note that the intended usage of dcterms:bibliographicCitation in Darwin Core, by contrast, is to provide the preferred way to cite the resource itself.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An identifier for the institution having custody of the object(s) or information referred to in the record.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>For physical specimens, the recommended best practice is to use an identifier from a collections registry such as the Global Registry of Biodiversity Repositories (<ahref="http://grbio.org/">http://grbio.org/</a>).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An identifier for the collection or dataset from which the record was derived.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>For physical specimens, the recommended best practice is to use an identifier from a collections registry such as the Global Registry of Biodiversity Repositories (<ahref="http://grbio.org/">http://grbio.org/</a>).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An identifier for the set of data. May be a global unique identifier or an identifier specific to a collection or institution.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The name (or acronym) in use by the institution having custody of the object(s) or information referred to in the record.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The name, acronym, coden, or initialism identifying the collection or data set from which the record was derived.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The name (or acronym) in use by the institution having ownership of the object(s) or information referred to in the record.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>location information not given for endangered species</code>, <code>collector identities withheld | ask about tissue samples</code></td></tr>
<tr><tdclass="theme-label">Definition</td><td>Actions 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.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>Coordinates generalized from original GPS coordinates to the nearest half degree grid cell</code>.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list of additional measurements, facts, characteristics, or assertions about the record. Meant to provide a mechanism for structured content.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a key:value encoding schema for a data interchange format such as JSON.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An existence of an Organism (sensu <ahref="http://rs.tdwg.org/dwc/terms/Organism">http://rs.tdwg.org/dwc/terms/Organism</a>) at a particular place at a particular time.</td></tr>
<tr><tdclass="theme-label">Examples</td><td>A wolf pack on the shore of Kluane Lake in 1988. A virus in a plant leaf in the New York Botanical Garden at 15:29 on 2014-10-23. A fungus in Central Park in the summer of 1929.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a persistent, globally unique identifier.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to separate the values in a list with space vertical bar space (<code> | </code>).</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>José E. Crespo</code>. <code>Oliver P. Pearson | Anita K. Pearson</code> (where the value in recordNumber <code>OPP 7101</code> corresponds to the collector number for the specimen in the field catalog of Oliver P. Pearson).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of the globally unique identifier for the person, people, groups, or organizations responsible for recording the original Occurrence.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to provide a single identifier that disambiguates the details of the identifying agent. If a list is used, it is recommended to separate the values in the list with space vertical bar space ( | ). The order of the identifiers on any list for this term can not be guaranteed to convey any semantics.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code><ahref="https://orcid.org/0000-0002-1825-0097">https://orcid.org/0000-0002-1825-0097</a></code> (for an individual); <code><ahref="https://orcid.org/0000-0002-1825-0097">https://orcid.org/0000-0002-1825-0097</a> | <ahref="https://orcid.org/0000-0002-1825-0098">https://orcid.org/0000-0002-1825-0098</a></code> (for a list of people).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The type of quantification system used for the quantity of organisms.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>A dwc:organismQuantityType must have a corresponding dwc:organismQuantity.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>27</code> (organismQuantity) with <code>individuals</code> (organismQuantityType). <code>12.5</code> (organismQuantity) with <code>%biomass</code> (organismQuantityType). <code>r</code> (organismQuantity) with <code>BraunBlanquetScale</code> (organismQuantityType).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>Statement about whether an organism or organisms have been introduced to a given place and time through the direct or indirect activity of modern humans.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use controlled value strings from the controlled vocabulary designated for use with this term, listed at <ahref="http://rs.tdwg.org/dwc/doc/em/">http://rs.tdwg.org/dwc/doc/em/</a>. For details, refer to <ahref="https://doi.org/10.3897/biss.3.38084">https://doi.org/10.3897/biss.3.38084</a></td></tr>
<tr><tdclass="theme-label">Definition</td><td>The degree to which an Organism survives, reproduces, and expands its range at the given place and time.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use controlled value strings from the controlled vocabulary designated for use with this term, listed at <ahref="http://rs.tdwg.org/dwc/doc/doe/">http://rs.tdwg.org/dwc/doc/doe/</a>. For details, refer to <ahref="https://doi.org/10.3897/biss.3.38084">https://doi.org/10.3897/biss.3.38084</a></td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use controlled value strings from the controlled vocabulary designated for use with this term, listed at <ahref="http://rs.tdwg.org/dwc/doc/pw/">http://rs.tdwg.org/dwc/doc/pw/</a>. For details, refer to <ahref="https://doi.org/10.3897/biss.3.38084">https://doi.org/10.3897/biss.3.38084</a></td></tr>
<tr><tdclass="theme-label">Definition</td><td>A categorical description of the extent to which the georeference has been verified to represent the best possible spatial description for the Location of the Occurrence.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>unable to georeference</code>, <code>requires georeference</code>, <code>requires verification</code>, <code>verified by data custodian</code>, <code>verified by contributor</code></td></tr>
<tr><tdclass="theme-label">Comments</td><td>For Occurrences, the default vocabulary is recommended to consist of "present" and "absent", but can be extended by implementers with good justification.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of preparations and preservation methods for a specimen.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to separate the values in a list with space vertical bar space (<code> | </code>).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The current state of a specimen with respect to the collection identified in collectionCode or collectionID.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of identifiers (publication, global unique identifier, URI) of media associated with the Occurrence.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of identifiers of other Occurrence records and their associations to this Occurrence.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>This term can be used to provide a list of associations to other Occurrences. Note that the ResourceRelationship class is an alternative means of representing associations, and with more detail. Recommended best practice is to separate the values in a list with space vertical bar space ( | ).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of identifiers (publication, bibliographic reference, global unique identifier, URI) of literature associated with the Occurrence.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to separate the values in a list with space vertical bar space ( | ). Note that the ResourceRelationship class is an alternative means of representing associations, and with more detail. Note also that the intended usage of the term dcterms:references in Darwin Core when applied to an Occurrence is to point to the definitive source representation of that Occurrence if one is available. Note also that the intended usage of dcterms:bibliographicCitation in Darwin Core when applied to an Occurrence is to provide the preferred way to cite the Occurrence itself.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code><ahref="http://www.sciencemag.org/cgi/content/abstract/322/5899/261">http://www.sciencemag.org/cgi/content/abstract/322/5899/261</a></code>, <code>Christopher J. Conroy, Jennifer L. Neuwald. 2008. Phylogeographic study of the California vole, Microtus californicus Journal of Mammalogy, 89(3):755-767.</code>, <code>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.</code></td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of identifiers (publication, global unique identifier, URI) of genetic sequence information associated with the Occurrence.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of identifiers or names of taxa and the associations of this Occurrence to each of them.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>This term can be used to provide a list of associations to Taxa other than the one defined in the Occurrence. Note that the ResourceRelationship class is an alternative means of representing associations, and with more detail. This term is not apt for establishing relationships between Taxa, only between specific Occurrences of an Organism with other Taxa. Recommended best practice is to separate the values in a list with space vertical bar space ( | ).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to separate the values in a list with space vertical bar space (<code> | </code>).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A particular organism or defined group of organisms considered to be taxonomically homogeneous.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Instances of the dwc:Organism class are intended to facilitate linking one or more dwc:Identification instances to one or more dwc: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.</td></tr>
<tr><tdclass="theme-label">Examples</td><td>A specific bird. A specific wolf pack. A specific instance of a bacterial culture.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended 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 dwc:Organism using a URI object in RDF, use rdf:type (<ahref="http://www.w3.org/1999/02/22-rdf-syntax-ns#type">http://www.w3.org/1999/02/22-rdf-syntax-ns#type</a>) instead.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of identifiers of other Organisms and the associations of this Organism to each of them.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>This term can be used to provide a list of associations to other Organisms. Note that the ResourceRelationship class is an alternative means of representing associations, and with more detail. Recommended best practice is to separate the values in a list with space vertical bar space ( | ).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of previous assignments of names to the Organism.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to separate the values in a list with space vertical bar space (<code> | </code>).</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>Chalepidae</code>, <code>Pinus abies</code>, <code>Anthus sp., field ID by G. Iglesias | Anthus correndera, expert ID by C. Cicero 2009-02-12 based on morphology</code></td></tr>
<tr><tdclass="theme-label">Definition</td><td>A physical result of a sampling (or subsampling) event. In biological collections, the material sample is typically collected, and either preserved or destructively processed.</td></tr>
<tr><tdclass="theme-label">Examples</td><td>A whole organism preserved in a collection. A part of an organism isolated for some purpose. A soil sample. A marine microbial sample.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An identifier for the broader Event that groups this and potentially other Events.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Use a globally unique identifier for a dwc:Event or an identifier for a dwc:Event that is specific to the data set.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>A1</code> (parentEventID to identify the main Whittaker Plot in nested samples, each with its own eventID - <code>A1:1</code>, <code>A1:2</code>).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An identifier given to the event in the field. Often serves as a link between field notes and the Event.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>1963-03-08T14:07-0600</code> (8 Mar 1963 at 2:07pm in the time zone six hours earlier than UTC). <code>2009-02-20T08:40Z</code> (20 February 2009 8:40am UTC). <code>2018-08-29T15:19</code> (3:19pm local time on 29 August 2018). <code>1809-02-12</code> (some time during 12 February 1809). <code>1906-06</code> (some time in June 1906). <code>1971</code> (some time in the year 1971). <code>2007-03-01T13:00:00Z/2008-05-11T15:30:00Z</code> (some time during the interval between 1 March 2007 1pm UTC and 11 May 2008 3:30pm UTC). <code>1900/1909</code> (some time during the interval between the beginning of the year 1900 and the end of the year 1909). <code>2007-11-13/15</code> (some time in the interval between 13 November 2007 and 15 November 2007).</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>14:07-0600</code> (2:07pm in the time zone six hours earlier than UTC). <code>08:40:21Z</code> (8:40:21am UTC). <code>13:00:00Z/15:30:00Z</code> (the interval between 1pm UTC and 3:30pm UTC).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The earliest integer 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).</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>1</code> (1 January). <code>366</code> (31 December), <code>365</code> (30 December in a leap year, 31 December in a non-leap year).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The latest integer 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).</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>1</code> (1 January). <code>32</code> (1 February). <code>366</code> (31 December). <code>365</code> (30 December in a leap year, 31 December in a non-leap year).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The names of, references to, or descriptions of the methods or protocols used during an Event.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is describe an Event with no more than one sampling protocol. In the case of a summary Event with multiple protocols, in which a specific protocol can not be attributed to specific Occurrences, the recommended best practice is to separate the values in a list with space vertical bar space ( | ).</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>UV light trap</code>, <code>mist net</code>, <code>bottom trawl</code>, <code>ad hoc observation | point count</code>, <code>Penguins from space: faecal stains reveal the location of emperor penguin colonies, <ahref="https://doi.org/10.1111/j.1466-8238.2009.00467.x">https://doi.org/10.1111/j.1466-8238.2009.00467.x</a></code>, <code>Takats et al. 2001. Guidelines for Nocturnal Owl Monitoring in North America. Beaverhill Bird Observatory and Bird Studies Canada, Edmonton, Alberta. 32 pp., <ahref="http://www.bsc-eoc.org/download/Owl.pdf">http://www.bsc-eoc.org/download/Owl.pdf</a></code></td></tr>
<tr><tdclass="theme-label">Definition</td><td>A numeric value for a measurement of the size (time duration, length, area, or volume) of a sample in a sampling event.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>A sampleSizeValue must have a corresponding sampleSizeUnit. </td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>5</code> for sampleSizeValue with <code>metre</code> for sampleSizeUnit.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The unit of measurement of the size (time duration, length, area, or volume) of a sample in a sampling event.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>A sampleSizeUnit must have a corresponding sampleSizeValue, e.g., <code>5</code> for sampleSizeValue with <code>metre</code> for sampleSizeUnit.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>40 trap-nights</code>, <code>10 observer-hours</code>, <code>10 km by foot</code>, <code>30 km by car</code></td></tr>
<tr><tdclass="theme-label">Definition</td><td>One 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.</td></tr>
<tr><tdclass="theme-label">Examples</td><td>The municipality of San Carlos de Bariloche, Río Negro, Argentina. The place defined by a georeference.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An identifier for the geographic region within which the Location occurred.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a persistent identifier from a controlled vocabulary such as the Getty Thesaurus of Geographic Names.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code><ahref="http://vocab.getty.edu/tgn/1002002">http://vocab.getty.edu/tgn/1002002</a></code> (Antártida e Islas del Atlántico Sur, Territorio Nacional de la Tierra del Fuego, Argentina).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of geographic names less specific than the information captured in the locality term.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to separate the values in a list with space vertical bar space (<code> | </code>), with terms in order from least specific to most specific.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>North Atlantic Ocean</code>. <code>South America | Argentina | Patagonia | Parque Nacional Nahuel Huapi | Neuquén | Los Lagos</code> (with accompanying values <code>South America</code> in continent, <code>Argentina</code> in country, <code>Neuquén</code> in stateProvince, and <code>Los Lagos</code> in county.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The name of the continent in which the Location occurs.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The name of the water body in which the Location occurs.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The name of the island group in which the Location occurs.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>Alexander Archipelago</code>, <code>Archipiélago Diego Ramírez</code>, <code>Seychelles</code></td></tr>
<tr><tdclass="theme-label">Definition</td><td>The name of the island on or near which the Location occurs.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names. Recommended best practice is to leave this field blank if the Location spans multiple entities at this administrative level or if the Location might be in one or another of multiple possible entities at this level. Multiplicity and uncertainty of the geographic entity can be captured either in the term higherGeography or in the term locality, or both.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The name of the next smaller administrative region than country (state, province, canton, department, region, etc.) in which the Location occurs.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The full, unabbreviated name of the next smaller administrative region than stateProvince (county, shire, department, etc.) in which the Location occurs.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The specific description of the place.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>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.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>Bariloche, 25 km NNE via Ruta Nacional 40 (=Ruta 237)</code>, <code>Queets Rainforest, Olympic National Park</code></td></tr>
<tr><tdclass="theme-label">Definition</td><td>The vertical datum used as the reference upon which the values in the elevation terms are based.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>-1.5</code> (below the surface). <code>4.2</code> (above the surface). For a 1.5 meter sediment core from the bottom of a lake (at depth 20m) at 300m elevation: verbatimElevation: <code>300m</code> minimumElevationInMeters: <code>300</code>, maximumElevationInMeters: <code>300</code>, verbatimDepth: <code>20m</code>, minimumDepthInMeters: <code>20</code>, maximumDepthInMeters: <code>20</code>, minimumDistanceAboveSurfaceInMeters: <code>0</code>, maximumDistanceAboveSurfaceInMeters: <code>-1.5</code>.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>-1.5</code> (below the surface). <code>4.2</code> (above the surface). For a 1.5 meter sediment core from the bottom of a lake (at depth 20m) at 300m elevation: verbatimElevation: <code>300m</code> minimumElevationInMeters: <code>300</code>, maximumElevationInMeters: <code>300</code>, verbatimDepth: <code>20m</code>, minimumDepthInMeters: <code>20</code>, maximumDepthInMeters: <code>20</code>, minimumDistanceAboveSurfaceInMeters: <code>0</code>, maximumDistanceAboveSurfaceInMeters: <code>-1.5</code>.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>Information about the source of this Location information. Could be a publication (gazetteer), institution, or team of individuals.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The ellipsoid, geodetic datum, or spatial reference system (SRS) upon which the geographic coordinates given in decimalLatitude and decimalLongitude as based.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use the EPSG code of the 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 <code>unknown</code>.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>30</code> (reasonable lower limit on or after 2020-05-01 of a GPS reading under good conditions if the actual precision was not recorded at the time). <code>100</code> (reasonable lower limit before 2020-05-01 of a GPS reading under good conditions if the actual precision was not recorded at the time). <code>71</code> (uncertainty for a UTM coordinate having 100 meter precision and a known spatial reference system).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A decimal representation of the precision of the coordinates given in the decimalLatitude and decimalLongitude.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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 empty) 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Detailed explanations with graphical examples can be found in the Georeferencing Best Practices, Chapman and Wieczorek, 2020 (<ahref="https://doi.org/10.15468/doc-gg7h-s853">https://doi.org/10.15468/doc-gg7h-s853</a>).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The coordinate format for the verbatimLatitude and verbatimLongitude or the verbatimCoordinates of the Location.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The ellipsoid, geodetic datum, or spatial reference system (SRS) upon which coordinates given in verbatimLatitude and verbatimLongitude, or verbatimCoordinates are based.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use the EPSG code of the 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 <code>unknown</code>.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The ellipsoid, geodetic datum, or spatial reference system (SRS) upon which the geometry given in footprintWKT is based.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use the EPSG code of the 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 <code>unknown</code>. It is also permitted to provide the SRS in Well-Known-Text, especially if no EPSG code provides the necessary values for the attributes of the SRS. Do not use this term to describe the SRS of the decimalLatitude and decimalLongitude, nor of any verbatim coordinates - use the geodeticDatum and verbatimSRS instead.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>epsg:4326</code>, <code>GEOGCS["GCS_WGS_1984", DATUM["D_WGS_1984", SPHEROID["WGS_1984",6378137,298.257223563]], PRIMEM["Greenwich",0], UNIT["Degree",0.0174532925199433]]</code> (WKT for the standard WGS84 Spatial Reference System EPSG:4326)</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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 empty) 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 footprintSpatialFit is 1.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Detailed explanations with graphical examples can be found in the Georeferencing Best Practices, Chapman and Wieczorek, 2020 (<ahref="https://doi.org/10.15468/doc-gg7h-s853">https://doi.org/10.15468/doc-gg7h-s853</a>).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of names of people, groups, or organizations who determined the georeference (spatial representation) for the Location.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to separate the values in a list with space vertical bar space (<code> | </code>).</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>1963-03-08T14:07-0600</code> (8 Mar 1963 at 2:07pm in the time zone six hours earlier than UTC). <code>2009-02-20T08:40Z</code> (20 February 2009 8:40am UTC). <code>2018-08-29T15:19</code> (3:19pm local time on 29 August 2018). <code>1809-02-12</code> (some time during 12 February 1809). <code>1906-06</code> (some time in June 1906). <code>1971</code> (some time in the year 1971). <code>2007-03-01T13:00:00Z/2008-05-11T15:30:00Z</code> (some time during the interval between 1 March 2007 1pm UTC and 11 May 2008 3:30pm UTC). <code>1900/1909</code> (some time during the interval between the beginning of the year 1900 and the end of the year 1909). <code>2007-11-13/15</code> (some time in the interval between 13 November 2007 and 15 November 2007).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A description or reference to the methods used to determine the spatial footprint, coordinates, and uncertainties.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to separate the values in a list with space vertical bar space (<code> | </code>).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>Notes 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The full name of the earliest possible geochronologic era or lowest chronostratigraphic erathem attributable to the stratigraphic horizon from which the cataloged item was collected.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The full name of the latest possible geochronologic era or highest chronostratigraphic erathem attributable to the stratigraphic horizon from which the cataloged item was collected.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The full name of the earliest possible geochronologic period or lowest chronostratigraphic system attributable to the stratigraphic horizon from which the cataloged item was collected.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The full name of the latest possible geochronologic period or highest chronostratigraphic system attributable to the stratigraphic horizon from which the cataloged item was collected.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The full name of the earliest possible geochronologic epoch or lowest chronostratigraphic series attributable to the stratigraphic horizon from which the cataloged item was collected.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The full name of the latest possible geochronologic epoch or highest chronostratigraphic series attributable to the stratigraphic horizon from which the cataloged item was collected.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The full name of the earliest possible geochronologic age or lowest chronostratigraphic stage attributable to the stratigraphic horizon from which the cataloged item was collected.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The full name of the latest possible geochronologic age or highest chronostratigraphic stage attributable to the stratigraphic horizon from which the cataloged item was collected.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The full name of the lowest possible geological biostratigraphic zone of the stratigraphic horizon from which the cataloged item was collected.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The full name of the highest possible geological biostratigraphic zone of the stratigraphic horizon from which the cataloged item was collected.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The combination of all litho-stratigraphic names for the rock from which the cataloged item was collected.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A string representing the taxonomic identification as it appeared in the original record.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>This term is meant to allow the capture of an unaltered original identification/determination, including identification qualifiers, hybrid formulas, uncertainties, etc. This term is meant to be used in addition to<code>scientificName</code>(and<code>identificationQualifier</code>etc.), not instead of it.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A brief phrase or a standard term ("cf.", "aff.") to express the determiner's doubts about the Identification.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>aff. agrifolia var. oxyadenia</code> (for <code>Quercus aff. agrifolia var. oxyadenia</code> with accompanying values <code>Quercus</code> in genus, <code>agrifolia</code> in specificEpithet, <code>oxyadenia</code> in infraspecificEpithet, and <code>var.</code> in taxonRank. <code>cf. var. oxyadenia</code> for <code>Quercus agrifolia cf. var. oxyadenia</code> with accompanying values <code>Quercus</code> in genus, <code>agrifolia</code> in specificEpithet, <code>oxyadenia</code> in infraspecificEpithet, and <code>var.</code> in taxonRank.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of nomenclatural types (type status, typified scientific name, publication) applied to the subject.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to separate the values in a list with space vertical bar space (<code> | </code>).</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>holotype of Ctenomys sociabilis. Pearson O. P., and M. I. Christie. 1985. Historia Natural, 5(37):388</code>, <code>holotype of Pinus abies | holotype of Picea abies</code></td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of names of people, groups, or organizations who assigned the Taxon to the subject.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to separate the values in a list with space vertical bar space (<code> | </code>).</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>James L. Patton</code>, <code>Theodore Pappenfuss | Robert Macey</code></td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of the globally unique identifier for the person, people, groups, or organizations responsible for assigning the Taxon to the subject.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to provide a single identifier that disambiguates the details of the identifying agent. If a list is used, the order of the identifiers on the list should not be assumed to convey any semantics. Recommended best practice is to separate the values in a list with space vertical bar space ( | ).</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code><ahref="https://orcid.org/0000-0002-1825-0097">https://orcid.org/0000-0002-1825-0097</a></code> (for an individual), <code><ahref="https://orcid.org/0000-0002-1825-0097">https://orcid.org/0000-0002-1825-0097</a> | <ahref="https://orcid.org/0000-0002-1825-0098">https://orcid.org/0000-0002-1825-0098</a></code> (for a list of people). </td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>1963-03-08T14:07-0600</code> (8 Mar 1963 at 2:07pm in the time zone six hours earlier than UTC). <code>2009-02-20T08:40Z</code> (20 February 2009 8:40am UTC). <code>2018-08-29T15:19</code> (3:19pm local time on 29 August 2018). <code>1809-02-12</code> (some time during 12 February 1809). <code>1906-06</code> (some time in June 1906). <code>1971</code> (some time in the year 1971). <code>2007-03-01T13:00:00Z/2008-05-11T15:30:00Z</code> (some time during the interval between 1 March 2007 1pm UTC and 11 May 2008 3:30pm UTC). <code>1900/1909</code> (some time during the interval between the beginning of the year 1900 and the end of the year 1909). <code>2007-11-13/15</code> (some time in the interval between 13 November 2007 and 15 November 2007).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of references (publication, global unique identifier, URI) used in the Identification.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to separate the values in a list with space vertical bar space (<code> | </code>).</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>Aves del Noroeste Patagonico. Christie et al. 2004.</code>, <code>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.</code></td></tr>
<tr><tdclass="theme-label">Definition</td><td>A categorical indicator of the extent to which the taxonomic identification has been verified to be correct.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary such as that used in HISPID and ABCD.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>0</code> ("unverified" in HISPID/ABCD).</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>Distinguished between Anthus correndera and Anthus hellmayri based on the comparative lengths of the uñas.</code></td></tr>
<tr><tdclass="theme-label">Definition</td><td>A group of organisms (sensu <ahref="http://purl.obolibrary.org/obo/OBI_0100026">http://purl.obolibrary.org/obo/OBI_0100026</a>) considered by taxonomists to form a homogeneous unit.</td></tr>
<tr><tdclass="theme-label">Examples</td><td>The genus Truncorotaloides as published by Brönnimann et al. in 1953 in the Journal of Paleontology Vol. 27(6) p. 817-820.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An identifier for the name usage (documented meaning of the name according to a source) of the currently valid (zoological) or accepted (botanical) taxon.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>This term should be used for synonyms or misapplied names to refer to the taxonID of a Taxon record that represents the accepted (botanical) or valid (zoological) name. For Darwin Core Archives the related record should be present locally in the same archive.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>This term should be used for accepted names to refer to the taxonID of a Taxon record that represents the next higher taxon rank in the same taxonomic classification. For Darwin Core Archives the related record should be present locally in the same archive.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>This term should be used to refer to the taxonID of a Taxon record that represents the usage of the terminal element of the scientificName as originally established under the rules of the associated nomenclaturalCode. For example, for names governed by the ICNafp, this term would establish the relationship between a record representing a subsequent combination and the record for its corresponding basionym. Unlike basionyms, however, this term can apply to scientific names at all ranks. For Darwin Core Archives the related record should be present locally in the same archive.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An identifier for the source in which the specific taxon concept circumscription is defined or implied. See nameAccordingTo.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An identifier for the publication in which the scientificName was originally established under the rules of the associated nomenclaturalCode.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An identifier for the taxonomic concept to which the record refers - not for the nomenclatural details of a taxon.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>This term should not contain identification qualifications, which should instead be supplied in the IdentificationQualifier term. When applied to an Organism or Occurrence, this term should be used to represent the scientific name that was applied to the associated Organism in accordance with the Taxon to which it was or is currently identified.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The full name, with authorship and date information if known, of the currently valid (zoological) or accepted (botanical) taxon.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>The full scientific name, with authorship and date information if known, of the accepted (botanical) or valid (zoological) name in cases where the provided scientificName is considered by the reference indicated in the accordingTo property, or of the content provider, to be a synonym or misapplied name. When applied to an Organism or Occurrence, this term should be used in cases where a content provider regards the provided scientificName to be inconsistent with the taxonomic perspective of the content provider. For example, there are many discrepancies within specimen collections and observation datasets between the recorded name (e.g., the most recent identification from an expert who examined a specimen, or a field identification for an observed organism), and the name asserted by the content provider to be taxonomically accepted.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>The full scientific name, with authorship and date information if known, of the name usage in which the terminal element of the scientificName was originally established under the rules of the associated nomenclaturalCode. For example, for names governed by the ICNafp, this term would indicate the basionym of a record representing a subsequent combination. Unlike basionyms, however, this term can apply to scientific names at all ranks.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>This term provides context to the <code>scientificName</code>. Together with the <code>scientificName</code>, separated by ‘sensu’ or ‘sec.’, it forms the taxon concept label, which may be seen as having the same relationship to <code>taxonConceptID</code> as, for example, <code>acceptedNameUsage</code> has to <code>acceptedNameUsageID</code>. When not provided, in Taxon Core data sets the <code>nameAccordingTo</code> can be taken to be the data set. In this case the data set mostly provides sufficient context to infer the delimitation of the taxon and its relationship with other taxa. In Occurrence Core data sets, when not provided, <code>nameAccordingTo</code> can be an underlying taxonomy of the data set, e.g. Plants of the World Online (<ahref="http://powo.science.kew.org/">http://powo.science.kew.org/</a>) for vascular plant records in iNaturalist (in which case it should be provided), or, which is the case for most <code>PreservedSpecimen</code> data sets, the <code>Identification</code>, in which case there is no further context.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>Franz NM, Cardona-Duque J (2013) Description of two new species and phylogenetic reassessment of Perelleschus Wibmer & O’Brien, 1986 (Coleoptera: Curculionidae), with a complete taxonomic concept history of Perelleschus sec. Franz & Cardona-Duque, 2013. Syst Biodivers. 11: 209–236.</code> (as the full citation of the Franz & Cardona-Duque (2013) in Perelleschus splendida sec. Franz & Cardona-Duque (2013))</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A reference for the publication in which the scientificName was originally established under the rules of the associated nomenclaturalCode.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>Pearson O. P., and M. I. Christie. 1985. Historia Natural, 5(37):388</code>, <code>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</code></td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of taxa names terminating at the rank immediately superior to the taxon referenced in the taxon record.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to separate the values in a list with space vertical bar space (<code> | </code>), with terms in order from the highest taxonomic rank to the lowest.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The genus part of the scientificName without authorship.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>For synonyms the accepted genus and the genus part of the name may be different. The term genericName should be used together with specificEpithet to form a binomial and with infraspecificEpithet to form a trinomial. The term genericName should only be used for combinations. Uninomials of generic rank do not have a genericName.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>Felis</code> (for scientificName "Felis concolor", with accompanying values of "Puma concolor" in acceptedNameUsage and "Puma" in genus).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The full scientific name of the subgenus in which the taxon is classified. Values should include the genus to avoid homonym confusion.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The infrageneric part of a binomial name at ranks above species but below genus.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>The term infragenericEpithet should be used in conjunction with genericName, specificEpithet, infraspecificEpithet, taxonRank and scientificNameAuthorship to represent the individual elements of the complete scientificName. It can be used to indicate the subgenus placement of a species, which in zoology is often given in parentheses. Can also be used to share infrageneric names such as botanical sections (e.g., <code>Vicia sect. Cracca</code>).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The name of the lowest or terminal infraspecific epithet of the scientificName, excluding any rank designation.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>In botany, where there can be more than one infraspecific rank, name strings may be provided, in literature and in identifications, that have more than two epithets. Only the last of these epithets is the infraspecificEpithet and only the first and the last epithets belong to the scientificName. For example: the infraspecificEpithet in the string "Indigofera charlieriana subsp. sessilis var. scaberrima" is <code>scaberrima</code> and the scientificName is <code>Indigophera charlieriana var. scaberrima</code>.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>concolor</code> (for scientificName "Puma concolor concolor"), <code>oxyadenia</code> (for scientificName "Quercus agrifolia var. oxyadenia"), <code>laxa</code> (for scientificName "Cheilanthes hirta f. laxa"), <code>scaberrima</code> (for scientificName "Indigofera charlieriana var. scaberrima").</td></tr>
<tr><tdclass="theme-label">Definition</td><td>Part of the name of a cultivar, cultivar group or grex that follows the scientific name.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>According to the Rules of the Cultivated Plant Code, a cultivar name consists of a botanical name followed by a cultivar epithet. The value given as the cultivarEpithet should exclude any quotes. The term taxonRank should be used to indicate which type of cultivated plant name (e.g. cultivar, cultivar group, grex) is concerned. This epithet, including any enclosing apostrophes or suffix, should be provided in scientificName as well.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The taxonomic rank of the most specific name in the scientificName as it appears in the original record.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The authorship information for the scientificName formatted according to the conventions of the applicable nomenclaturalCode.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The nomenclatural code (or codes in the case of an ambiregnal name) under which the scientificName is constructed.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A measurement of or fact about an rdfs:Resource (<ahref="http://www.w3.org/2000/01/rdf-schema#Resource">http://www.w3.org/2000/01/rdf-schema#Resource</a>).</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Resources can be thought of as identifiable records or instances of classes and may include, but need not be limited to dwc:Occurrence, dwc:Organism, dwc:MaterialSample, dwc:Event, dwc:Location, dwc:GeologicalContext, dwc:Identification, or dwc:Taxon.</td></tr>
<tr><tdclass="theme-label">Examples</td><td>The weight of an organism in grams. The number of placental scars. Surface water temperature in Celsius.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A list (concatenated and separated) of names of people, groups, or organizations who determined the value of the MeasurementOrFact.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to separate the values in a list with space vertical bar space (<code> | </code>).</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>Rob Guralnick</code>, <code>Peter Desmet | Stijn Van Hoey</code></td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>1963-03-08T14:07-0600</code> (8 Mar 1963 at 2:07pm in the time zone six hours earlier than UTC). <code>2009-02-20T08:40Z</code> (20 February 2009 8:40am UTC). <code>2018-08-29T15:19</code> (3:19pm local time on 29 August 2018). <code>1809-02-12</code> (some time during 12 February 1809). <code>1906-06</code> (some time in June 1906). <code>1971</code> (some time in the year 1971). <code>2007-03-01T13:00:00Z/2008-05-11T15:30:00Z</code> (some time during the interval between 1 March 2007 1pm UTC and 11 May 2008 3:30pm UTC). <code>1900/1909</code> (some time during the interval between the beginning of the year 1900 and the end of the year 1909). <code>2007-11-13/15</code> (some time in the interval between 13 November 2007 and 15 November 2007).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A description of or reference to (publication, URI) the method or protocol used to determine the measurement, fact, characteristic, or assertion.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>minimum convex polygon around burrow entrances</code> (for a home range area). <code>barometric altimeter</code> (for an elevation).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A relationship of one rdfs:Resource (<ahref="http://www.w3.org/2000/01/rdf-schema#Resource">http://www.w3.org/2000/01/rdf-schema#Resource</a>) to another.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Resources can be thought of as identifiable records or instances of classes and may include, but need not be limited to dwc:Occurrence, dwc:Organism, dwc:MaterialSample, dwc:Event, dwc:Location, dwc:GeologicalContext, dwc:Identification, or dwc:Taxon.</td></tr>
<tr><tdclass="theme-label">Examples</td><td>An instance of an Organism is the mother of another instance of an Organism. A uniquely identified Occurrence represents the same Occurrence as another uniquely identified Occurrence. A MaterialSample is a subsample of another MaterialSample.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An identifier for an instance of relationship between one resource (the subject) and another (relatedResource, the object).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An identifier for the relationship type (predicate) that connects the subject identified by resourceID to its object identified by relatedResourceID.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use the identifiers of the terms in a controlled vocabulary, such as the OBO Relation Ontology.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code><ahref="http://purl.obolibrary.org/obo/RO_0002456">http://purl.obolibrary.org/obo/RO_0002456</a></code> (for the relation "pollinated by"), <code><ahref="http://purl.obolibrary.org/obo/RO_0002455">http://purl.obolibrary.org/obo/RO_0002455</a></code> (for the relation "pollinates"), <code><ahref="https://www.inaturalist.org/observation_fields/879">https://www.inaturalist.org/observation_fields/879</a></code> (for the relation "eaten by")</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An identifier for a related resource (the object, rather than the subject of the relationship).</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The relationship of the subject (identified by resourceID) to the object (identified by relatedResourceID).</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>sameAs</code>, <code>duplicate of</code>, <code>mother of</code>, <code>offspring of</code>, <code>sibling of</code>, <code>parasite of</code>, <code>host of</code>, <code>valid synonym of</code>, <code>located within</code>, <code>pollinator of members of taxon</code>, <code>pollinated specific plant</code>, <code>pollinated by members of taxon</code></td></tr>
<tr><tdclass="theme-label">Definition</td><td>The source (person, organization, publication, reference) establishing the relationship between the two resources.</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>1963-03-08T14:07-0600</code> (8 Mar 1963 at 2:07pm in the time zone six hours earlier than UTC). <code>2009-02-20T08:40Z</code> (20 February 2009 8:40am UTC). <code>2018-08-29T15:19</code> (3:19pm local time on 29 August 2018). <code>1809-02-12</code> (some time during 12 February 1809). <code>1906-06</code> (some time in June 1906). <code>1971</code> (some time in the year 1971). <code>2007-03-01T13:00:00Z/2008-05-11T15:30:00Z</code> (some time during the interval between 1 March 2007 1pm UTC and 11 May 2008 3:30pm UTC). <code>1900/1909</code> (some time during the interval between the beginning of the year 1900 and the end of the year 1909). <code>2007-11-13/15</code> (some time in the interval between 13 November 2007 and 15 November 2007).</td></tr>
<tr><tdclass="theme-label">Examples</td><td><code>mother and offspring collected from the same nest</code>, <code>pollinator captured in the act</code></td></tr>
<tr><tdclass="theme-label">Definition</td><td>A language of the resource.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use an IRI from the Library of Congress ISO 639-2 scheme <ahref="http://id.loc.gov/vocabulary/iso639-2">http://id.loc.gov/vocabulary/iso639-2</a></td></tr>
<tr><tdclass="theme-label">Definition</td><td>Use to link a dcterms:Location instance subject to the lowest level standardized hierarchically-described resource.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>Use to link a dwc:Identification instance subject to a taxonomic entity such as a taxon, taxon concept, or taxon name use.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>A "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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>Use to link any subject resource that is part of a collection to the collection containing the resource.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A person, group, or organization who determined the georeference (spatial representation) for the Location.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A description of the behavior shown by the subject at the time the Occurrence was recorded.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary. Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>Actions 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The degree to which an Organism survives, reproduces, and expands its range at the given place and time.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use IRIs from the controlled vocabulary designated for use with this term, listed at <ahref="http://rs.tdwg.org/dwc/doc/doe/">http://rs.tdwg.org/dwc/doc/doe/</a>. For details, refer to <ahref="https://doi.org/10.3897/biss.3.38084">https://doi.org/10.3897/biss.3.38084</a> . Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The current state of a specimen with respect to the collection identified in collectionCode or collectionID.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary. Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>Use 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The process by which the biological individual(s) represented in the Occurrence became established at the location.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use IRIs from the controlled vocabulary designated for use with this term, listed at <ahref="http://rs.tdwg.org/dwc/doc/em/">http://rs.tdwg.org/dwc/doc/em/</a>. For details, refer to <ahref="https://doi.org/10.3897/biss.3.38084">https://doi.org/10.3897/biss.3.38084</a> . Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>One 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>The subject is a dwc:Event instance and the object is a (possibly IRI-identified) resource that is the field notes.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An identifier given to the event in the field. Often serves as a link between field notes and the Event.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>The subject is a (possibly IRI-identified) resource that is the field notes and the object is a dwc:Event instance.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The ellipsoid, geodetic datum, or spatial reference system (SRS) upon which the geometry given in footprintWKT is based.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>Use to link a dwc:GeologicalContext instance to an IRI-identified lithostratigraphic unit at the lowest possible level in a hierarchy.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended 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.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The ellipsoid, geodetic datum, or spatial reference system (SRS) upon which the geographic coordinates given in decimalLatitude and decimalLongitude as based.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use an IRI for the EPSG code of the SRS, if known. Otherwise use an IRI or controlled vocabulary for the name or code of the geodetic datum, if known. Otherwise use an IRI or controlled vocabulary for the name or code of the ellipsoid, if known. If none of these is known, use the value <code>unknown</code>.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A description or reference to the methods used to determine the spatial footprint, coordinates, and uncertainties.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A categorical description of the extent to which the georeference has been verified to represent the best possible spatial description for the Location of the Occurrence.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary. Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A categorical indicator of the extent to which the taxonomic identification has been verified to be correct.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Terms in the dwciri namespace are intended to be used in RDF with non-literal objects. Recommended best practice is to use a controlled vocabulary such as that used in HISPID and ABCD.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>Use to link a subject dataset record to the dataset which contains it.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>A string literal name of the dataset can be provided using the term dwc:datasetName. See the Darwin Core RDF Guide for details.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>Use 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary. Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>Information about the source of this Location information. Could be a publication (gazetteer), institution, or team of individuals.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The nature of the measurement, fact, characteristic, or assertion.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary. Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A statement about the presence or absence of a Taxon at a Location.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary. Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use IRIs from the controlled vocabulary designated for use with this term, listed at <ahref="http://rs.tdwg.org/dwc/doc/pw/">http://rs.tdwg.org/dwc/doc/pw/</a>. For details, refer to <ahref="https://doi.org/10.3897/biss.3.38084">https://doi.org/10.3897/biss.3.38084</a> . Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>An 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.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>The subject is a dwc:Occurrence and the object is a (possibly IRI-identified) resource that is the field notes.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The reproductive condition of the biological individual(s) represented in the Occurrence.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary. Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The unit of measurement of the size (time duration, length, area, or volume) of a sample in a sampling event.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>A sampleSizeUnit must have a corresponding sampleSizeValue. Recommended best practice is to use a controlled vocabulary such as the Ontology of Units of Measure <ahref="http://www.wurvoc.org/vocabularies/om-1.8/">http://www.wurvoc.org/vocabularies/om-1.8/</a> of SI units, derived units, or other non-SI units accepted for use within the SI.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The methods or protocols used during an Event, denoted by an IRI.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is describe an Event with no more than one sampling protocol. In the case of a summary Event in which a specific protocol can not be attributed to specific Occurrences, the recommended best practice is to repeat the property for each IRI that denotes a different sampling protocol that applies to the Occurrence.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The sex of the biological individual(s) represented in the Occurrence.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary. Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A nomenclatural type (type status, typified scientific name, publication) applied to the subject.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The spatial coordinate system for the verbatimLatitude and verbatimLongitude or the verbatimCoordinates of the Location.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary. Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The ellipsoid, geodetic datum, or spatial reference system (SRS) upon which coordinates given in verbatimLatitude and verbatimLongitude, or verbatimCoordinates are based.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use an IRI for the EPSG code of the SRS, if known. Otherwise use a controlled vocabulary IRI for the name or code of the geodetic datum, if known. Otherwise use a controlled vocabulary IRI for the name or code of the ellipsoid, if known.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>The vertical datum used as the reference upon which the values in the elevation terms are based.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>Recommended best practice is to use a controlled vocabulary. Terms in the dwciri namespace are intended to be used in RDF with non-literal objects.</td></tr>
<tr><tdclass="theme-label">Definition</td><td>A reference to or citation of one, a part of, or multiple specimens in scholarly publications.</td></tr>
<tr><tdclass="theme-label">Comments</td><td>This class constitutes a new value for the controlled vocabulary in the recommendations for basisOfRecord. When importing Darwin Core Archives of literature-based datasets to GBIF, the basisOfRecord should be changed from “Occurrence”, "PreservedSpecimen" or "Literature" to “MaterialCitation”.</td></tr>
<tr><tdclass="theme-label">Examples</td><td>A citation of a physical specimen from a scientific collection in a taxonomic treatment in a scientific publication. A citation of a group of physical specimens, such as paratypes in a taxonomic treatment in a scientific publication. An occurrence mentioned in a field note book.</td></tr>
<tr><tdclass="theme-label">Examples</td><td>Evidence of an Occurrence taken from field notes or literature. A record of an Occurrence without physical evidence nor evidence captured with a machine. </td></tr>
<tr><tdclass="theme-label">Examples</td><td>A photograph. A video. An audio recording. A remote sensing image. A Occurrence record based on telemetry.</td></tr>
To cite Darwin Core in general, use the peer-reviewed article on Darwin Core:
Wieczorek J, Bloom D, Guralnick R, Blum S, Döring M, et al. (2012) Darwin Core: An Evolving Community-Developed Biodiversity Data Standard. PLoS ONE 7(1): e29715. <https://doi.org/10.1371/journal.pone.0029715>
To cite the standard document upon which this page is built, use the following:
Darwin Core Maintenance Group. 2021. List of Darwin Core terms. Biodiversity Information Standards (TDWG). <http://rs.tdwg.org/dwc/doc/list/>
To cite this document specifically, use the following:
Darwin Core Maintenance Group. 2021. Darwin Core quick reference guide. Biodiversity Information Standards (TDWG). <https://dwc.tdwg.org/terms/>
