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<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.
Usage/Remarks
A document may take multiple sets of keywords, with attributes such as @kwd-group-type, @specific-use, @xml:lang, or @vocab used to discriminate between the sets.
None of the individual keyword elements (<kwd>, <compound-kwd>, <nested-kwd>) may take the @xml:lang attribute; that is reserved for the <kwd-group>. This means that keywords must be separated by language and placed into language
groups.
Typically, the @kwd-group-type attribute 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 <kwd-group> 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.
Vocabulary Identification Attributes
Two attributes are used in this Tag Set to identify a vocabulary. When these attributes
are used on a <kwd-group>, they apply to all keywords in the group and need not be repeated on each <kwd> or other enclosed element.
|
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/”.
|
Attributes
Models and Context
May be contained in
Description
The following, in order:
- <label> Label (of an Equation, Figure, Reference, etc.), zero or one
- <title> Title, zero or one
- Any one of:
- One or more of any of:
- <unstructured-kwd-group> Unstructured Keyword Group, zero or more
Content Model
<!ELEMENT kwd-group %kwd-group-model; >
Expanded Content Model
(label?, title?, ((kwd | compound-kwd | nested-kwd | x)+ | (unstructured-kwd-group)*))
Tagged Samples
Author’s keywords
...
<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>
...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>
...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> ...
Multiple <kwd-group>s
... <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> ...
Nested keywords
... <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> ...
One <kwd-group>, Two vocabularies
...
<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>
...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>
...Dublin Core
...
<kwd-group vocab="dublincore" kwd-group-type="classification">
<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>
...With vocabulary attributes
...
<kwd-group kwd-group-type="physh" xml:lang="en"
vocab="PhySH" vocab-identifier="https://physh.org/">
<nested-kwd>
<kwd content-type="facet"
vocab="PhySH" vocab-identifier="https://physh.org/"
vocab-term-identifier="https://physh.aps.org/browse?facetIds=Research%2520Areas"
>Research Areas</kwd>
<nested-kwd>
<kwd content-type="concept"
vocab="PhySH" vocab-identifier="https://physh.org/"
vocab-term-identifier="https://doi.org/10.29172/ba7ccb8ed7eb4e6f9c1eb622f5b4e242"
>Atomic & molecular processes in external fields</kwd>
<nested-kwd>
<kwd content-type="concept"
vocab="PhySH" vocab-identifier="https://physh.org/"
vocab-term-identifier="https://doi.org/10.29172/da893accf204480b8a7e386479c50687"
>Coherent control</kwd>
</nested-kwd>
</nested-kwd>
</nested-kwd>
<nested-kwd>
<kwd content-type="facet"
vocab="PhySH" vocab-identifier="https://physh.org/"
vocab-term-identifier="https://physh.aps.org/browse?facetIds=Physical%2520Systems"
>Physical Systems</kwd>
<nested-kwd>
<kwd content-type="concept"
vocab="PhySH" vocab-identifier="https://physh.org/"
vocab-term-identifier="https://doi.org/10.29172/bd252d88a60848979416daf84dee7f6b"
>Atomic Systems</kwd>
<nested-kwd>
<kwd content-type="concept"
vocab="PhySH" vocab-identifier="https://physh.org/"
vocab-term-identifier="https://doi.org/10.29172/42e66168abfd4328aa9df6fc3a077f75"
>Molecules</kwd>
</nested-kwd>
</nested-kwd>
</nested-kwd>
</kwd-group>
...