[Boost-users] Is it possible to sort the vertices in adjacency_list ?

Hi, we have a graph with bundled properties for vertices, edges and graph it self. The vertices have X and Y Cartesian coordinates. Now I'd like to SORT them along one of the axis. Is it possible to do it "inside" the graph? Which container should i choose? Custom one? Does this change the edge mapping? Or do I need to copy the vertices in one external container? Thanks in advance!