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vocab-term Vocabulary/Taxonomy Term

The named vocabulary’s canonical form of the term. (Note: The content of the element to which this attribute is attached is the display version of the term.)

Usage/Remarks

The content of the element to which this attribute is attached is the display version of the vocabulary or taxonomic term. The @vocab-term attribute holds a canonical version of the same term, as it appears in the vocabulary. For example, if the attribute value is “digitized-vor”, the element might contain the display text “Digitized Version of Record”.
Vocabulary Attributes
Four attributes are used in this Tag Set to identify a term from a controlled or an uncontrolled vocabulary:
vocab
Name of the controlled or uncontrolled vocabulary, taxonomy, ontology, index, database, or similar that is the source of the term. For example, for a subject term, a value might be the IPC Codes (“ipc”) or MESH headings (“mesh”). For an uncontrolled term, the value might be an area of study such as “medical-devices” or merely the word “uncontrolled”.
vocab-identifier
Unique identifier of the vocabulary, such as (but not limited to) a URI or DOI. For example, for Dublin Core (DCC), the identifier may be http://dublincore.org/documents/2012/06/14/dces/. For the ANSI/NISO Contributor Role Taxonomy (CRediT), the identifier may be http://credit.niso.org/.
vocab-term
The content of the element is the display version of the vocabulary or taxonomic term. The @vocab-term attribute holds the canonical version of the same term, as it appears in the vocabulary. For example, if the attribute value is “digitized-vor”, the element might contain the display text “Digitized Version of Record”.
vocab-term-identifier
Unique identifier of the term within a specific vocabulary, such as (but not limited to) an item number, a URI, DOI, etc.
OPTIONAL on many elements; click for list and usage

<article-version>, <compound-kwd>, <compound-subject>, <custom-meta>, <extended-by>, <index-term>, <inline-media>, <kwd>, <named-content>, <nested-kwd>, <restricted-by>, <role>, <see>, <see-also>, <subject>, <term>

Value Meaning
Text, numbers, or special characters The canonical form of the term in the named vocabulary. This may or may not duplicate the content of the element.
Restriction @vocab-term is an optional attribute; there is no default.
Tagged Samples
Vocabulary is a CRediT taxonomy term. 
...
<contrib-group>
 <contrib>
  <string-name><given-names>Barbara</given-names> <surname>Johnston</surname></string-name>
  <role vocab="CRediT" 
    vocab-identifier="http://credit.niso.org//"
    vocab-term="Conceptualization"
    vocab-term-identifier=
    "http://credit.niso.org/contributor-roles/conceptualization/"
    degree-contribution="lead">study designer</role>
 </contrib>
 <contrib>
  <string-name><given-names>Brooke</given-names> <surname>Jackson</surname></string-name>
  <role vocab="CRediT" 
    vocab-identifier="http://credit.niso.org/"
    vocab-term="Writing &#8212; original draft"
    vocab-term-identifier=
    "http://credit.niso.org/contributor-roles/writing-original-draft/"
    degree-contribution="lead">writer</role>
 </contrib>
</contrib-group>
...
Special characters in CRediT attribute values need to be given as Unicode character references. In narrative text, Unicode character references, general entities, or characters may be used. 
...
<contrib-group>
 <contrib>
  <string-name><given-names>Anne</given-names> <surname>Berns</surname></string-name>
  <role vocab="CRediT" 
    vocab-identifier="http://credit.niso.org/"
    vocab-term="Writing &#8212; original draft"
    vocab-term-identifier=
    "http://credit.niso.org/contributor-roles/writing-original-draft/"
    degree-contribution="lead">Article Author &ndash; Original Draft</role>
 </contrib>
</contrib-group>
...
Two vocabularies in one keyword group 
...
<kwd-group kwd-group-type="library-classifications">
 <compound-kwd vocab="LOC" 
   vocab-term="Diseases of the respiratory system"
   vocab-term-identifier="RC705-779">
  <compound-kwd-part>RC705-779</compound-kwd-part>
  <compound-kwd-part>Diseases of the respiratory system</compound-kwd-part>
 </compound-kwd>

 <compound-kwd vocab="Dewey Decimal" 
   vocab-term="Diseases of the respiratory system"
   vocab-term-identifier="616.3">
  <compound-kwd-part>616.3</compound-kwd-part>
  <compound-kwd-part>Diseases of the respiratory system</compound-kwd-part>
 </compound-kwd>
</kwd-group>
...
ICD10 vocabulary 
...
<kwd-group kwd-group-type="conditions">
 <compound-kwd vocab="ICD10" vocab-term="J00-J99">
  <compound-kwd-part>J00-J99</compound-kwd-part>
  <compound-kwd-part>Diseases of the respiratory system</compound-kwd-part>
 </compound-kwd>
</kwd-group>
...
Generic subject within Dublin Core subjects 
...
<kwd-group vocab="dublincore" kwd-group-type="classification">
 <nested-kwd vocab="scientific name">
  <kwd vocab="scientific name" vocab-term="kingdom">Plantae</kwd>
  <kwd vocab="scientific name" vocab-term="phylum">Anthophyta</kwd>
  <kwd vocab="scientific name" vocab-term="class">Monocoty</kwd>
  <kwd vocab="scientific name" vocab-term="order">Commelinales</kwd>
  <kwd vocab="scientific name" vocab-term="family">Poaceae</kwd>
  <kwd vocab="scientific name" vocab-term="genus">Zea</kwd>
  <kwd vocab="scientific name" vocab-term="species">Z. mays</kwd>
 </nested-kwd>
</kwd-group>
...