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<nested-kwd> Nested Keyword

A hierarchically-structured keyword, such as a keywords from a controlled vocabulary.
Related Elements
This Tag Set contains several differently-structured types of keywords:
  • The element <kwd> is used with simple keywords: words or phrases.
  • The element <compound-kwd> is used with multi-part keywords, such as a keyword that is a code-and-term pair.
  • The element <nested-kwd> is used with hierarchical keywords structures, such as taxonomies, to record a portion of a taxonomic hierarchy. Both simple and compound keywords can be nested hierarchically.
Attributes
assigning-authority
content-type
vocab
vocab-identifier
vocab-term
vocab-term-identifier

Base Attributes

id
xml:base
Models and Context
May be contained in
<kwd-group>, <nested-kwd>
Description
The following, in order:
Content Model
<!ELEMENT  nested-kwd   %nested-kwd-model;                           >
Expanded Content Model

((kwd | compound-kwd)+, nested-kwd*)

Tagged Samples
3-level nested list 
...
<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>
...
Nested compound keywords 
...
<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>
...
Hierarchy of heart diseases 
...
<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>
...
Related Resource