subj-group-type Type of Subject Group

Subject, information class, or type of a particular <subj-group> element.
OPTIONAL on element: <subj-group>
Value Meaning
Text, numbers, or special characters Type of subject.
Restriction @subj-group-type is an optional attribute; there is no default.
Tagged Sample

Classifying subjects for a Table of Contents

...
<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>
...