Keyword Group

Container element for one set of keywords (<kwd>s) used to describe a document


For a detailed discussion on the use of <kwd-group>, see Keywords.

A document may have multiple sets of keywords, with the @kwd-group-type attribute used to discriminate between them. The @kwd-group-type attribute most commonly names the source of the keywords, such as “MESH”, “ISO-463”, or “author-generated”. But it is also appropriate to use @kwd-group-type to record the type of keywords, 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.


id Identifier
kwd-group-type Keyword Authority
xml:lang Language

Content Model

<!ELEMENT  kwd-group    %kwd-group-model;                            >

Expanded Content Model

(title?, (kwd | compound-kwd)+)


The following, in order:

This element may be contained in:



<kwd-group kwd-group-type="author">
<kwd>DNA analysis</kwd>
<kwd>gene expression</kwd>
<kwd>parallel cloning</kwd>
<kwd>fluid microarray</kwd>