?  slide 11

An <index-term> is Either

<sec id="sec10-3-3">
  <title>Interstate Compacts<index-term id="idx313">
  <term>Interstate compacts</term></index-term></title>
  ...
<sec id="sec10-3-3-5">
  <title>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"/>
</sec>
</sec>
 ?