<kwd-group>
Keyword Group
Container element for one set of keywords (such as <kwd>s, <nested-kwd>s, or <compound-kwd>s) used to describe a document.
Remarks
Related Essay: For a discussion on the use of <kwd-group>, see Keywords.
Usage: A document may take multiple sets of keywords, with the @kwd-group-type, @specific-use, or @xml:lang attributes used to discriminate between them. The <kwd> element does not take the @xml:lang attribute; that is reserved for the <kwd-group>. This means that keywords must be sorted by language and entered in language groups.
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.
Attributes
Content Model
<!ELEMENT kwd-group %kwd-group-model; >
Expanded Content Model
(title?, (kwd | compound-kwd | nested-kwd)+)
This element may be contained in:
Example 1
An author’s list of keywords for a document:
<article dtd-version="1.1">
<front>
<article-meta>...
<abstract>...</abstract>
<kwd-group kwd-group-type="author">
<kwd>DNA analysis</kwd>
<kwd>gene expression</kwd>
<kwd>parallel cloning</kwd>
<kwd>fluid microarray</kwd>
</kwd-group>
</article-meta>
</front>
...</article>
Example 2
Keyword group with compound keywords:
...
<kwd-group>
<compound-kwd>
<compound-kwd-part content-type="code">B01D57/02</compound-kwd-part>
<compound-kwd-part content-type="value">By electrophoresis</compound-kwd-part>
</compound-kwd>
...
</kwd-group>
...Example 3
Multiple keyword groups for a document (including Japanese):
... <article-meta>... <kwd-group xml:lang="en"> <kwd>heated air</kwd> </kwd-group> <kwd-group xml:lang="ja"> <kwd>加温空気</kwd> </kwd-group> ... </article-meta> ...