Used in an embedded index entry to hold preferred terms that make “See” references in a generated index.
<!ELEMENT see (#PCDATA %see-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 | disp-formula | disp-formula-group | array | code | graphic | media | preformat)*
Any combination of:
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<sec id="sec10-3-3">
<title>Interstate Compacts<index-term id="idx313"><term>Interstate
compacts</term><see>States, Agreements with other States</see>
</index-term></title>
<sec id="sec10-3-3-1">...</sec>
<sec id="sec10-3-3-2">
<title content-type="run-in">Subject Matter of Interstate Compacts</title>
<p>For many years after the Constitution was adopted, boundary
disputes continued to predominate as the subject matter of agreements
among the States. Since the turn of the twentieth century, however, the
interstate compact has been used to an increasing extent as an instrument
for state cooperation ...</p>
</sec>
...
<sec id="sec10-3-3-5">
<title content-type="run-in">Legal Effect of Interstate Compacts</title>
<p>Whenever, by the agreement of the States concerned and the
consent of Congress, an interstate compact comes into operation, it
has the same effect as ... <index-term-range-end rid="idx313"/></p>
</sec>
</sec>
...