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.
Key words are contained in <kwd-group>s. There may be several <kwd-group>s, each of which can be identified separately by language or vocabulary source. 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.
Related Essay: For a discussion on the use of <kwd>, see Keywords.
Best Practice: In this Tag Set, <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>
JATS-articlemeta0.ent