One subject term, critical expression, key phrase, abbreviation, indexing word, etc., that is associated with the whole document and can be used for identification, searching, 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 | email | ext-link | uri | inline-supplementary-material | related-article | related-object | hr | bold | italic | monospace | overline | overline-start | overline-end | roman | sans-serif | sc | strike | underline | underline-start | underline-end | alternatives | inline-graphic | private-char | chem-struct | inline-formula | tex-math | mml:math | abbrev | milestone-end | milestone-start | named-content | styled-content | fn | target | xref | sub | sup | x | break)*
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>