/span> <span class=identifier>Tag</span><span class=special>&gt;</span>
<span class=keyword>struct</span> <span class=identifier>index_iterator</span>           <span class=comment><b>// deprecated</b></span>
<span class=special>{</span>
  <span class=keyword>typedef</span> <span class=keyword>typename</span> <span class=identifier>MultiIndexContainer</span><span class=special>::</span><span class=identifier>index_iterator</span><span class=special>&lt;</span><span class=identifier>Tag</span><span class=spe