Collection of one or more Indexes. Collected Indexes need not be grouped into this element.
<!ELEMENT index-group %index-group-model; >
(title-group?, (address | alternatives | answer | answer-set | array | boxed-text | chem-struct-wrap | code | fig | fig-group | graphic | media | preformat | question | question-wrap | supplementary-material | table-wrap | table-wrap-group | disp-formula | disp-formula-group | def-list | list | tex-math | mml:math | p | related-article | related-object | ack | disp-quote | speech | statement | verse-group | x)*, (index)+)
The following, in order:
...
<book-back>
<index-group>
<index>
<title-group><title>Author Index</title></title-group>
...
<index-div>
<title-group><title>K</title></title-group>
<index-entry>
<term>Kay, Michael</term>
<nav-pointer-group>
<nav-pointer rid="k1" nav-pointer-type="point"/>
<nav-pointer rid="k2" nav-pointer-type="point"/>
</nav-pointer-group>
</index-entry>
<index-entry>
<term>Kepper, Johannes</term>
<nav-pointer rid="k3" nav-pointer-type="point"/>
</index-entry>
...
</index-div>
...
</index>
<index>
<title-group><title>Topic Index</title></title-group>
<index-div>
<title-group><title>Concepts</title></title-group>
...
<index-entry>
<term>Computational Linguistics</term>
<nav-pointer rid="c1" nav-pointer-type="point"/>
</index-entry>
<index-entry>
<term>Concurrent Markup/Overlap</term>
<nav-pointer-group>
<nav-pointer rid="c2" nav-pointer-type="point"/>
<nav-pointer rid="c3" nav-pointer-type="point"/>
<nav-pointer rid="c4" nav-pointer-type="point"/>
</nav-pointer-group>
</index-entry>
...
</index-div>
...
</index>
</index-group>
</book-back>
...