Type or Kind of Keywords in the Group

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. (If the keywords are from a controlled vocabulary, that can be named in the @vocab attribute.
  • 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 not named).


Difference from @vocab attribute: In prior versions of this Tag Set, the @kwd-group-type attribute was used to hold a third type of information: the name of a controlled or generic (uncontrolled) vocabulary, taxonomy, ontology, database, thesaurus, etc. that is the source of the keywords in the group. The @vocab attribute has been added to hold the name of the vocabulary, so that information should no longer be put in @kwd-group-type.
Difference from @assigning-authority attribute:The attribute @assigning-authority names the organization or system that administers or is otherwise responsible for (has authority over) the keywords (such as Crossref, Figshare, and others).

Used on Elements: <kwd-group>, <unstructured-kwd-group>

Text, numbers, or special charactersThe organizational source of keywords. For example, this may be an organization (such as “IEEE”), the name of a taxonomy, subject index, or ontology (such as “mesh”), or an implied group of people (such as “author-generated”).
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