A hierarchically-structured keyword, such as a keywords from a taxonomy.
Key words are contained in <kwd-group>s. There may be several <kwd-group>s, each of which can be identified separately by language, vocabulary, or taxonomy source. None of the individual keyword elements (<kwd>, <compound-kwd>, <nested-kwd>) 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.
<!ELEMENT nested-kwd %nested-kwd-model; >
((kwd | compound-kwd)+, nested-kwd*)
...
<kwd-group kwd-group-type="xyw-food-taxonomy">
<nested-kwd>
<kwd>drink</kwd>
<nested-kwd>
<kwd>alcoholic</kwd>
<nested-kwd>
<kwd>beer</kwd>
<kwd>martini</kwd>
<kwd>wine</kwd>
</nested-kwd>
</nested-kwd>
<nested-kwd>
<kwd>dairy</kwd>
<nested-kwd>
<kwd>milk</kwd>
<kwd>drinkable yogurt</kwd>
<kwd>milkshakes</kwd>
</nested-kwd>
</nested-kwd>
</nested-kwd>
</kwd-group>
...
...
<kwd-group kwd-group-type="ISO-party-codes">
<nested-kwd>
<compound-kwd content-type="ISO-party-codes">
<compound-kwd-part content-type="ISO-party-code-value">4335</compound-kwd-part>
<compound-kwd-part content-type="ISO-party-code-name">Halloween</compound-kwd-part>
</compound-kwd>
<nested-kwd>
<compound-kwd>
<compound-kwd-part content-type="ISO-party-code-value">43351</compound-kwd-part>
<compound-kwd-part content-type="ISO-party-code-name">Adult Halloween
Party</compound-kwd-part>
</compound-kwd>
<compound-kwd>
<compound-kwd-part content-type="ISO-party-code-value">43352</compound-kwd-part>
<compound-kwd-part content-type="ISO-party-code-name">Children's Halloween
Party</compound-kwd-part>
</compound-kwd>
</nested-kwd>
</nested-kwd>
</kwd-group>
...
...
<article-meta>
...
<abstract>...</abstract>
<kwd-group kwd-group-type="author">
<nested-kwd>
<kwd>Other rheumatic heart disease</kwd>
<nested-kwd>
<kwd>Rhematic myocarditis</kwd>
<kwd>Other and unspecified rheumatic heart disease</kwd>
<nested-kwd>
<kwd>Rheumatic heart disease, unspecified</kwd>
<kwd>Rheumatic heart failure (congestive)</kwd>
<kwd>Other</kwd>
</nested-kwd>
</nested-kwd>
</nested-kwd>
</kwd-group>
</article-meta>
...
JATS-articlemeta1.ent