oost/histogram/axis/category.hpp</a>&gt;

</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Value<span class="special">,</span> <span class="keyword">typename</span> MetaData<span class="special">,</span> <span class="keyword">typename</span> Options<span class="special">,</span> 
         <span class="keyword">typename</span> Allocator<span class="special">&gt;</span> 
<span class="keyword">class</span> <a class="link" href="category.html" ti