lation.and.pair.with.info"></span>
      </p>
<p>
        Relations and bimap pairs constructors will take an extra argument. If only
        two arguments are used, the information will be initialized with their default
        constructor.
      </p>
<p>
</p>
<pre class="programlisting"><span class="keyword">typedef</span> <span class="identifier">bimap</span><span class="special">&lt;</span>

    <span class="identifier">multiset_of</span><span class="special">&lt;</span> <span class="identifier">std</sp