Name of one subject or topic used to describe a book or component of a book. Such topics and groupings of topics are typically used to provide headings for groups of documents or document components in a printed, or online, generated Table of Contents.
In some journals, articles are grouped into categories which this Tag Set calls <subject>s, which may be grouped into <subj-group>s. Similarly, a book may use this subject-grouping mechanism to make real or virtual groups for related book parts (<book-part>s). These subject categories are typically shown in the Table of Contents, at the top of the first print or display page, or on the web splash page for the book or book part. Sometimes the grouping or category refers to the type of document, such as “Essay”, “Lesson”, “Award”, or “Unit”. Sometimes the grouping refers to subject areas, such as “Physical Sciences”, “Biological Sciences”, or “Social Sciences”. Sometimes the grouping refers to topics within the larger subject areas, such as “Applied Math”, “Biology”, or “Chemistry”. For example, a one-level grouping might be:
<subj-group>
<subject>Notation</subject>
</subj-group>
or, as another example:
<subj-group>
<subject>Magnetic Resonance</subject>
</subj-group>And a four-level grouping might be:
<subj-group subj-group-type="keywords">
<subject>Biological Sciences</subject>
<subj-group subj-group-type="keywords">
<subject>Neuroscience</subject>
<subj-group subj-group-type="keywords">
<subject>Cellular and Molecular Biology</subject>
<subj-group subj-group-type="keywords">
<subject>Blood–brain barrier</subject>
</subj-group>
</subj-group>
</subj-group>
</subj-group>Both books and book parts may also be assigned to more than one grouping. For example, if a book part is classified as “Biochemistry” under “Biological Sciences” and “Chemistry” under “Physical Sciences”, the <subj-group> container element may repeat. For example:
<subj-group>
<subject>Chemical Disciplines</subject>
<subj-group>
<subject>Biological Sciences</subject>
<subj-group>
<subject>Biochemistry</subject>
</subj-group>
</subj-group>
<subj-group>
<subject>Physical Sciences</subject>
<subj-group>
<subject>Chemistry</subject>
</subj-group>
</subj-group>
</subj-group>
<!ELEMENT subject (#PCDATA %subject-elements;)* >
(#PCDATA | email | ext-link | uri | inline-supplementary-material | related-article | related-object | hr | bold | fixed-case | italic | monospace | overline | overline-start | overline-end | roman | sans-serif | sc | strike | underline | underline-start | underline-end | ruby | alternatives | inline-graphic | private-char | chem-struct | inline-formula | tex-math | mml:math | abbrev | index-term | index-term-range-end | milestone-end | milestone-start | named-content | styled-content | fn | target | xref | sub | sup | x | break)*
Any combination of:
Organization groupings for a chapter
<book dtd-version="1.0">
<book-meta>...</book-meta>
<front-matter>...</front-matter>
<book-body>
<book-part id="bid.2" book-part-type="chapter">
<book-part-meta>
<subj-group>
<subject>Physical Sciences</subject>
<subj-group>
<subject>Introductory Chemistry</subject>
<subject>Organic Chemistry</subject>
<subject>Physical Chemistry</subject>
</subj-group>
</subj-group>
<subj-group>
<subject>Biological Sciences</subject>
<subj-group>
<subject>Biochemistry</subject>
</subj-group>
</subj-group>
<title-group>
<label>1</label>
<title>GenBank: The Nucleotide Sequence Database</title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name><surname>Mizrachi</surname>
<given-names>Ilene</given-names></name>
</contrib>
</contrib-group>
<pub-history>...</pub-history>
</book-part-meta>
<body>
<sec id="bid.3">...</sec>
</body>
<back>...</back>
</book-part>
</book-body>
</book>
Subjects that are similar to keywords:
...
<book-part id="bid.12" book-part-type="chapter">
<book-part-meta>
<subj-group>
<subject>ISO/TC 43</subject>
<subj-group>
<subject>SC 1, Noise</subject>
</subj-group>
</subj-group>
</book-part-meta>
<body>...</body>
</book-part>
...
...
<book-part-meta>
<subj-group>
<subject>ISO/TC 108</subject>
<subject>SC 2, Measurement and evaluation of mechanical vibration
and shock as applied to machines, vehicles and structures</subject>
</subj-group>
</book-part-meta>
...
...
<book-part-meta>
<subj-group subj-group-type="kwd">
<subject content-type="neurosci">Cellular and Molecular
Biology</subject>
<subj-group>
<subject content-type="neurosci">Blood–brain
barrier</subject>
</subj-group>
</subj-group>
</book-part-meta>
...
Subjects for Table of Contents grouping:
... <book-part id="bid.1" book-part-type="part"> <book-part-meta> <subj-group subj-group-type="toc-heading"> <subject>PAPERS</subject> <subj-group> <subject>Structural, Mechanical, Thermodynamic, and Optical Properties of Condensed Matter</subject> </subj-group> </subj-group> </book-part-meta> <body>...</body> </book-part> ...
A single chapter may belong to many subject groups:
... <book-part id="bid.8" book-part-type="chapter"> <book-part-meta> <subj-group> <subject>Legal Reform</subject> <subj-group> <subject>Federal Court Decisions</subject> <subj-group> <subject>Supreme Court Opinions</subject> <subj-group> <subject>Criminal Procedure</subject> <subj-group> <subject>Fourth Amendment: Search and Seizure</subject> <subj-group> <subject>Vehicle Passenger Rights: <italic>Brendlin v. California</italic></subject> </subj-group> </subj-group> </subj-group> </subj-group> <subj-group> <subject>4th Circuit Decisions</subject> <subj-group> <subject>Habeas Corpus</subject> <subj-group> <subject>Detaining U.S. Residents: <italic>Al-Marri v. Wright</italic></subject> </subj-group> </subj-group> </subj-group> </subj-group> <subj-group> <subject>Federal Law</subject> <subj-group> <subject>Changes to FISA Surveillance: Protect America Act of 2007</subject> </subj-group> </subj-group> <subj-group> <subject>Ethical Guidelines</subject> <subj-group> <subject>Protecting Client Confidences</subject> <subj-group> <subject>Potential for Identity Theft in Pleadings and Filings</subject> <subj-group> <subject>Drivers License Numbers</subject> </subj-group> <subj-group> <subject>Social Security Numbers</subject> </subj-group> </subj-group> </subj-group> </subj-group> </subj-group> </book-part-meta> <body>...</body> </book-part> ...