"special">::</span><span class="identifier">iterator</span><span class="special">,</span> <span class="keyword">bool</span> <span class="special">&gt;</span> 
<a name="idm46093049602768-bb"></a><span class="identifier">add_attribute</span><span class="special">(</span><span class="identifier">attribute_name</span> <span class="keyword">const</span> <span class="special">&amp;</span> name<span class="special">,</span> <span class="identifier">attribute</span> <span class="keyword">const</span> <span class="s