One subject term, critical expression, key phrase, abbreviation, indexing word, etc., that is associated with the whole document and can be used for identification and indexing purposes
For a detailed discussion on the use of <kwd>, see Keywords.
Conversion Note: <kwd>s are not allowed to nest. There are a few journal tag sets in which keyword nesting is used to simulate a two-part list. Such a keyword list should be tagged as a <def-list> instead.
<!ELEMENT kwd (#PCDATA %kwd-elements;)* >
(#PCDATA | bold | italic | monospace | overline | roman | sans-serif | sc | strike | underline | named-content | styled-content | sub | sup)*
Any combination of:
<article> <front> ... <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>