ss is provided, which gives the user
access to the vertex and edge descriptor types without requiring the
user to provide the property types for the graph.

<pre>
  template &lt;class EdgeList, class VertexList, class Directed&gt;
  struct adjacency_list_traits {
    typedef ... vertex_descriptor;
    typedef ... edge_descriptor;
    typedef ... directed_category;
    typedef ... edge_parallel_category;
  };
</pre>

<h3>Where Defined</h3>

<a href="../../../boost/graph/adjacency_list.hpp"><tt>boost/graph/ad