Keyword Authority

This attribute is used with two different definitions:
  • The actual organizational source or type of organizational source that established a particular group of keywords, for example, “inspec”, “IEEE”, “author-generated”, “web-host”, “publisher”, “editorial”, etc.
  • The second usage describes the class or type of keyword for some of the more unusual keyword groups (for example, “hierarchical” for keywords that are grouped into a hierarchy, “abbreviations” for keywords that contain an abbreviation and its expansion, or “code” for keywords that contain a code and its text but where the source of the codes is unknown).


In prior versions of this Tag Set, the @kwd-group-type attribute (which is still semantically overloaded) was used with a third definition:
  • Holds the name of a controlled or generic (uncontrolled) vocabulary, taxonomy, ontology, database, thesaurus, etc. that is the source of the keywords in the group, for example, “CRediT”, “DCC”, “structural engineering”, “ISO-463”, or “ICD9-codes”, etc.
  • The @vocab attribute has been added to hold this information.

Used on Element: <kwd-group>

Text, numbers, or special charactersThe source of keywords. This may be an organization (such as “IEEE”) or the name of a taxonomy, subject index, or ontology (such as “CRediT”).
Restriction@kwd-group-type is an optional attribute; there is no default.


<kwd-group kwd-group-type="Inspec-class">
<compound-kwd-part content-type="code">B0260</compound-kwd-part>
<compound-kwd-part content-type="text">Optimisation