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<compound-kwd> Compound Keyword

Wrapper element for multi-part keywords (for example, a code and its meaning).

Usage/Remarks

Some keywords are a simple word or phrase; such keywords should generally be tagged using the <kwd> element. The <compound-kwd> element is used when keywords are composed of multiple parts, such as:
  • a code and its meaning, or
  • an abbreviation and its expansion.

Attribute Best Practice

If the <compound-kwd> contains terms from a single controlled vocabulary (ontology, taxonomy, term-list, vocabulary, industry glossary, or other known source), the two vocabulary identification attributes should be used to record that source. The vocabulary term identification attributes may also be used to provide semantics for the keyword.
Vocabulary Identification Attributes
Two attributes are used in this Tag Set to identify a vocabulary. When these attributes are used on a <compound-kwd>, they apply to the entire keyword.
vocab
Name of the controlled or uncontrolled vocabulary, taxonomy, ontology, index, database, or similar that is the source of a term. For example, the value might be the IPC Codes (“ipc”) or MESH headings (“mesh”). For an uncontrolled term, the value might be an area of study such as “medical-devices” or merely the word “uncontrolled”.
vocab-identifier
Unique identifier of the vocabulary, such as (but not limited to) a URI or DOI. For example, for Dublin Core (DCC), the identifier may be “http://dublincore.org/documents/2012/06/14/dces/”.
Vocabulary Term Identification Attributes
Two attributes are used in this Tag Set to identify an individual term from a vocabulary (controlled or an uncontrolled):
vocab-term
The content of the element is the display version of the vocabulary or taxonomic term. The @vocab-term attribute holds the canonical version of the same term, as it appears in the vocabulary. For example, if the element display text content is “Digitized Version of Record” the attribute value might be “digitized-vor”
vocab-term-identifier
Unique identifier of the term within a specific vocabulary, such as (but not limited to) an item number, a URI, DOI, etc.
Related Elements
This Tag Set contains several differently-structured types of keywords:
  • <kwd> is used with simple keywords: words or phrases.
  • <compound-kwd> is used with multi-part keywords, such as a keyword that is a code-and-term pair.
  • <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.
  • <unstructured-kwd-group> is used to hold one long keyword, in which the multiple constituent keywords are not tagged individually.
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
<compound-kwd-part> Compound Keyword Part, one or more
Content Model
<!ELEMENT  compound-kwd %compound-kwd-model;                         >
Expanded Content Model

(compound-kwd-part+)

Tagged Samples
Codes and expansions 
...
<article-meta>
 ...  
 <kwd-group kwd-group-type="Inspec-class">
  <compound-kwd>
   <compound-kwd-part content-type="code">B0260</compound-kwd-part>
   <compound-kwd-part content-type="text">Optimisation 
    techniques</compound-kwd-part>
  </compound-kwd>
  <compound-kwd>
   <compound-kwd-part content-type="code">B6140</compound-kwd-part>
   <compound-kwd-part content-type="text">Signal processing and 
    detection</compound-kwd-part>
  </compound-kwd>
  <compound-kwd>
   <compound-kwd-part content-type="code">B6320</compound-kwd-part>
   <compound-kwd-part content-type="text">Radar equipment, systems 
    and applications</compound-kwd-part>
  </compound-kwd>
 </kwd-group>
</article-meta>
...
...
<article-meta>
 ...
 <abstract>...</abstract>
 <kwd-group kwd-group-type="author">
  <compound-kwd content-type="ISO-639-1">
   <compound-kwd-part content-type="ISO-639-1-code">de</compound-kwd-part>
   <compound-kwd-part content-type="ISO-639-1-language">German</compound-kwd-part>
  </compound-kwd>
  <compound-kwd content-type="ISO-639-1">
   <compound-kwd-part content-type="ISO-639-1-code">en</compound-kwd-part>
   <compound-kwd-part content-type="ISO-639-1-language">English</compound-kwd-part>
  </compound-kwd>
  <compound-kwd content-type="ISO-639-1">
   <compound-kwd-part content-type="ISO-639-1-code">fr</compound-kwd-part>
   <compound-kwd-part content-type="ISO-639-1-language">French</compound-kwd-part>
  </compound-kwd>
  ...
 </kwd-group>
</article-meta>
...
... 
<kwd-group> 
 <compound-kwd>
  <compound-kwd-part content-type="code">B01D57/02</compound-kwd-part>
  <compound-kwd-part content-type="value">By electrophoresis</compound-kwd-part>
 </compound-kwd>
 ...
</kwd-group>
...
Abbreviations and expansions 
...
<article-meta>
 ...
 <abstract>...</abstract>
 <kwd-group kwd-group-type="author">
  <compound-kwd>
   <compound-kwd-part content-type="abbrev">AODM</compound-kwd-part>
   <compound-kwd-part content-type="expansion">adult onset diabetes mellitus</compound-kwd-part>
  </compound-kwd>
  <compound-kwd>
   <compound-kwd-part content-type="abbrev">DI</compound-kwd-part>
   <compound-kwd-part content-type="expansion">diabetes insipidus</compound-kwd-part>
  </compound-kwd>
  <compound-kwd>
   <compound-kwd-part content-type="abbrev">DKA</compound-kwd-part>
   <compound-kwd-part content-type="expansion">diabetic ketoacidosis</compound-kwd-part>
  </compound-kwd>
  ...
 </kwd-group>
</article-meta>
...
ICD10 vocabulary 
...
<kwd-group kwd-group-type="conditions">
  <compound-kwd vocab="ICD10" vocab-term="J00-J99">
    <compound-kwd-part>J00-J99</compound-kwd-part>
    <compound-kwd-part>Diseases of the respiratory system</compound-kwd-part>
  </compound-kwd>
</kwd-group>
...
Identifying the vocabulary 
...
<kwd-group id="KG1" vocab="Inspec"
  vocab-identifier="http://www.theiet.org/resources/inspec/about/records/ithesaurus.cfm"
  xml:lang="en">
 <compound-kwd id="KG1.1">
  <compound-kwd-part content-type="code">A7865P</compound-kwd-part>
  <compound-kwd-part content-type="text">Optical properties of other 
   inorganic semiconductors and insulators (thin films/low dimensional 
   structures)</compound-kwd-part>
 </compound-kwd>

 <compound-kwd id="KG1.2">
  <compound-kwd-part content-type="code">A7865T</compound-kwd-part>
  <compound-kwd-part content-type="text">Optical properties of organic
   compounds and polymers (thin films/low dimensional structures)</compound-kwd-part>
 </compound-kwd>
</kwd-group>
...
Coded keywords (including Japanese) 
...
<article-meta>
 ...
 <kwd-group xml:lang="ja">
  <compound-kwd>
   <compound-kwd-part content-type="code">321</compound-kwd-part>
   <compound-kwd-part content-type="text">加温空気</compound-kwd-part>
  </compound-kwd>
 </kwd-group>
</article-meta>
...
Two vocabularies in one <kwd-group> 
...
<kwd-group kwd-group-type="library-classifications">
 <compound-kwd vocab="LOC" 
   vocab-term="Diseases of the respiratory system"
   vocab-term-identifier="RC705-779">
  <compound-kwd-part>RC705-779</compound-kwd-part>
  <compound-kwd-part>Diseases of the respiratory system</compound-kwd-part>
 </compound-kwd>

 <compound-kwd vocab="Dewey Decimal" 
   vocab-term="Diseases of the respiratory system"
   vocab-term-identifier="616.3">
  <compound-kwd-part>616.3</compound-kwd-part>
  <compound-kwd-part>Diseases of the respiratory system</compound-kwd-part>
 </compound-kwd>
</kwd-group>
...
Related Resources