This attribute is used with two different definitions:
- The most common is the name of the thesaurus, ontology, or organization that established a particular group of keywords, for example, “MESH”, “ISO-463”, “IEEE”, “author-generated”, “ICD9-codes”, etc.
- The second usage describes the 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).
Used on Elements: <kwd-group>, <unstructured-kwd-group>
|Text, numbers, or special characters||The source of keywords. This may be an organization (such as “IEEE”) or the name of a thesaurus, subject index, or ontology (such as “MESH”).|
|Restriction||@kwd-group-type is an optional attribute; there is no default.|
... <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> ...