ect.</p>

 <p>An equality join is a match on all entities in a given primary index that
 have two or more specific secondary key values.  Note that key ranges may
 not be matched by an equality join, only exact keys are matched.</p>

 <p>For example:</p>
 <pre class="code">
  // Index declarations -- see <a href="package-summary.html#example">package summary example</a>.
  //
  PrimaryIndex&lt;String, Person&gt; personBySsn;
  SecondaryIndex&lt;String, String, Person&gt; personByParentSsn;
  SecondaryIndex&