kwd-group-type Type or Kind of Keywords in the Group

The class or type of keyword, for example, “abbreviations” (for keywords that contain an abbreviation and its expansion) or “author-provided”.

Usage/Remarks

If the keywords are from a controlled vocabulary, that vocabulary can be named in the @vocab attribute.
The @kwd-group-type attribute is used in two different senses:
  • The primary usage describes the class or type of keyword, for example, “abbreviations” for keywords that contain an abbreviation and its expansion, “hierarchical” for keywords that are grouped into a hierarchy, or “code” for keywords that contain a code and its text.
  • Historically, this attribute also named the organizational source that established a particular group of keywords, although the attribute @assigning-authority is frequently more useful for that purpose. Currently, this attribute may be used to name the type of source, such as “author-provided” or “publisher”, if it is not needed to record keyword type.

When to Use @assigning-authority

Current Best Practice is to use the @assigning-authority to name the organizational source whenever that attribute is appropriate; for example, Inspec, Crossref, Figshare, and other organizations should be tagged with @assigning-authority.
This @kwd-group-type attribute should have as values sources that are not appropriate assigning authorities, such as “author-provided”, “publisher”, and “editorial”.
Historical Note: @vocab
In prior versions of this Tag Set, the @kwd-group-type attribute was used to hold a third type of information: the source of the keywords in the group as the name of a generic (uncontrolled) vocabulary or of a controlled vocabulary, taxonomy, ontology, database, thesaurus, etc. Since the @vocab attribute has been added to hold the name of the vocabulary, taxonomy, ontology, etc., this information should no longer be put in the @kwd-group-type attribute.
OPTIONAL on elements: <kwd-group>, <unstructured-kwd-group>
Value Meaning
Text, numbers, or special characters This attribute is used in two different senses: 1) The primary usage describes the class or type of keyword, for example, “abbreviations” for keywords that contain an abbreviation and its expansion, “hierarchical” for keywords that are grouped into a hierarchy, or “code” for keywords that contain a code and its text. 2) The attribute can also name the source that established a particular group of keywords, when the source is not an institutional assigning authority, for example, “author-provided”, “publisher”, and “editorial”.
Restriction @kwd-group-type is an optional attribute; there is no default.
Tagged Sample

INSPEC keywords

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