[Boost-users] [BGL] Access bundle graph properties

How does one access a bundle graph property in adjacency_list ? for example struct VertexProperties { int index; bool status; }; struct EdgeProperties { int index; bool status; }; struct GraphProperties { int something; }; boost::adjacency_list < boost::listS, boost::vecS, boost::directedS, VertexProperties, EdgeProperties, GraphProperties

graph;

if 'v' is a vertex then I can do 'grap[v].status' to get that vertex property. But what about the graph properties? I've tried 'graph.something' but that didn't work :( Any suggestions ? regards, Ioannis