<kwd-group>

Keyword Group

Container element for one set of keywords (such as <kwd>s, <nested-kwd>s, or <compound-kwd>s) used to describe a document.

Remarks

Related Essay: For a discussion on the use of <kwd-group>, see Keywords.
Usage: A document may take multiple sets of keywords, with the @kwd-group-type, @specific-use, or @xml:lang attributes used to discriminate between them. 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.
The @kwd-group-type attribute most commonly names the source of the keywords, such as “mesh”, “ISO-463”, or “author-generated”. But it is also appropriate to use @kwd-group-type to identify the type of keywords, for example, “hierarchical” for keywords that are grouped into a hierarchy, “abbreviations” for keywords that contain an abbreviation and its expansion, or “code” for keywords that contain a code and its text but where the source of the codes is unknown.
Attribute Best Practice: If the content of the <kwd-group> element is a term from a controlled vocabulary (ontology, taxonomy, term-list, vocabulary, industry glossary, or other known source), the vocabulary attributes should be used to record that source. The source named can be a formal ontology or an informal field of study. Two attributes are used in this Tag Set to identify such a controlled or uncontrolled vocabulary:
vocab
Name of the controlled or uncontrolled vocabulary, taxonomy, ontology, index, database, or similar that is the source of the term. For example, for a subject term, a 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/”.

Attributes

id Document Internal Identifier
kwd-group-type Keyword Authority
specific-use Specific Use
vocab Vocabulary/Taxonomy Name
vocab-identifier Vocabulary/Taxonomy Identifier
xml:base Base
xml:lang Language

Content Model

<!ELEMENT  kwd-group    %kwd-group-model;                            >

Expanded Content Model

(label?, title?, ((kwd | compound-kwd | nested-kwd | x)+ | (unstructured-kwd-group)*))

Description

The following, in order:

This element may be contained in:

<app-group>, <article-meta>, <chem-struct-wrap>, <disp-formula>, <disp-formula-group>, <fig>, <fig-group>, <front-stub>, <graphic>, <media>, <sec-meta>, <statement>, <supplementary-material>, <table-wrap>, <table-wrap-group>

Example 1

An author’s list of keywords for a document:
...
<article-meta>
...
<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>
...

Example 2

Keyword group with compound keywords:
... 
<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>
...

Example 3

Multiple keyword groups for a document (including Japanese):
...
<article-meta>
...  
<kwd-group xml:lang="en">
<kwd>heated air</kwd>
</kwd-group>

<kwd-group xml:lang="ja">
<kwd>加温空気</kwd>
</kwd-group>
...  
</article-meta>
...

Example 4

Multiple keyword groups for a document, where each group was created by a separate organization or process:
...
<article-meta>
...  
<kwd-group kwd-group-type="Inspec">
<kwd>diversity reception</kwd>
<kwd>Doppler radar</kwd>
<kwd>Doppler shift</kwd>
<kwd>encoding</kwd>
<kwd>optimisation</kwd>
<kwd>orthogonal codes</kwd>
<kwd>radar signal processing</kwd>
<kwd>MIMO radar</kwd>
</kwd-group>

<kwd-group kwd-group-type="uncontrolled">
<kwd>polyphase codes optimisation</kwd>
<kwd>multiinput-multioutput radars</kwd>
<kwd>radar performance</kwd>
<kwd>diversity technique</kwd>
<kwd>MIMO radar transmission</kwd>
<kwd>diversity performance</kwd>
<kwd>orthogonal codes</kwd>
<kwd>Doppler sensitive</kwd>
<kwd>side-lobes level</kwd>
<kwd>adaptive clonal selection algorithm</kwd>
<kwd>polyphase coded orthogonal signals</kwd>
<kwd>aperiodic autocorrelation side lobe</kwd>
<kwd>Doppler shift tolerance</kwd>
<kwd>sustainable Doppler shifts</kwd>
<kwd>Doppler tolerance performances</kwd>
</kwd-group>

<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>
...

Example 5

Nested keyword in section metadata to provide navigation information for an app:
...
<sec>
<sec-meta>
<kwd-group specific-use="mobile-nav">
  <nested-kwd>
    <kwd>dosing</kwd>
    <nested-kwd>
      <kwd>geriatric</kwd>
      <nested-kwd>
        <kwd>Digoxin</kwd>
      </nested-kwd>
    </nested-kwd>
  </nested-kwd>
</kwd-group>
  
<kwd-group specific-use="mobile-nav">
  <nested-kwd>
    <kwd>Digoxin</kwd>
    <nested-kwd>
      <kwd>dosing</kwd>
      <nested-kwd>
        <kwd>geriatric</kwd>
      </nested-kwd>
    </nested-kwd>
  </nested-kwd>
</kwd-group>
</sec-meta>
<title>Dosing Table, Geriatric</title>
...
</sec>
...

Example 6

Two vocabularies in one keyword 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>
...

Example 7

An 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>
...

Example 8

Generic subject within Dublin Core subjects:
...
<kwd-group vocab="dublincore" kwd-group-type="subject">
  <nested-kwd vocab="scientific name">
    <kwd vocab="scientific name" vocab-term="kingdom">Plantae</kwd>
    <kwd vocab="scientific name" vocab-term="phylum">Anthophyta</kwd>
    <kwd vocab="scientific name" vocab-term="class">Monocoty</kwd>
    <kwd vocab="scientific name" vocab-term="order">Commelinales</kwd>
    <kwd vocab="scientific name" vocab-term="family">Poaceae</kwd>
    <kwd vocab="scientific name" vocab-term="genus">Zea</kwd>
    <kwd vocab="scientific name" vocab-term="species">Z. mays</kwd>
  </nested-kwd>
</kwd-group>
...

Journal Archiving and Interchange Tag Library NISO JATS Version 1.2 (ANSI/NISO Z39.96-2019)

Version of May 2019

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