template <class OutEdgeList,
          class VertexList,
          class Directed,
          class VertexProperties,
          class EdgeProperties,
          class FaceProperties,
          class GraphProperties,
          class EdgeList
          >
class HEDIGraph : public boost::adjacency_list< OutEdgeList,           // out-edges stored in a std::list
                                                VertexList,            // vertex set stored here
                                                Directed,              // bidirectional graph.
                                                VertexProperties,      // vertex properties
                                                EdgeProperties,        // edge properties
                                                GraphProperties,
                                                EdgeList
                                                >
{
    public:
        typedef unsigned int HEFace;
        typedef boost::adjacency_list< OutEdgeList,
                                                VertexList,
                                                Directed,
                                                VertexProperties,
                                                EdgeProperties,
                                                GraphProperties,
                                                EdgeList
                                                > BGLGraph;
        /// use base class operator[] for vertex and edge properties
        using BGLGraph::operator[];
        /// operator[] to access face properties
        FaceProperties& operator[](HEFace f)  {
            return faces[f];
        }
        /// const operator[] for accessing face properties
        const FaceProperties& operator[](HEFace f) const  {
            return faces[f];
        }
//DATA
        std::vector<FaceProperties> faces;
};