<keywords>

<keywords> (keywords) contains a list of keywords or phrases identifying the topic or nature of a text. [2.4.3 The Text Classification]
Module header — The TEI Header
Attributes
scheme⚓︎ identifies the controlled vocabulary within which the set of keywords concerned is defined, for example by a taxonomy element, or by some other resource.
Status Optional
Datatype teidata.pointer
Contained by
header: textClass
May contain
core: list term
Note

Each individual keyword (including compound subject headings) should be supplied as a term element directly within the keywords element. An alternative usage, in which each term appears within an item inside a list is permitted for backwards compatibility, but is deprecated.

If no control list exists for the keywords used, then no value should be supplied for the scheme attribute.
Example
<keywords scheme="http://classificationweb.net">
 <term>Babbage, Charles</term>
 <term>Mathematicians - Great Britain - Biography</term>
</keywords>
Example
<keywords>
 <term>Fermented beverages</term>
 <term>Central Andes</term>
 <term>Schinus molle</term>
 <term>Molle beer</term>
 <term>Indigenous peoples</term>
 <term>Ethnography</term>
 <term>Archaeology</term>
</keywords>
Content model 
<content>
 <alternate>
  <elementRef key="term" minOccurs="1"
   maxOccurs="unbounded"/>
  <elementRef key="list"/>
 </alternate>
</content>
Schema Declaration 
<rng:element name="keywords">
 <rng:ref name="att.global.attributes"/>
 <rng:ref name="att.global.rendition.attributes"/>
 <rng:ref name="att.global.linking.attributes"/>
 <rng:ref name="att.global.analytic.attributes"/>
 <rng:ref name="att.global.facs.attributes"/>
 <rng:ref name="att.global.change.attributes"/>
 <rng:ref name="att.global.responsibility.attributes"/>
 <rng:ref name="att.global.source.attributes"/>
 <rng:optional>
  <rng:attribute name="scheme">
   <rng:ref name="teidata.pointer"/>
  </rng:attribute>
 </rng:optional>
 <rng:choice>
  <rng:oneOrMore>
   <rng:ref name="term"/>
  </rng:oneOrMore>
  <rng:ref name="list"/>
 </rng:choice>
</rng:element>
element keywords
{
   att.global.attributes,
   att.global.rendition.attributes,
   att.global.linking.attributes,
   att.global.analytic.attributes,
   att.global.facs.attributes,
   att.global.change.attributes,
   att.global.responsibility.attributes,
   att.global.source.attributes,
   attribute scheme { teidata.pointer }?,
   ( term+ | list )
}