I wrote the code below to construct a directed graph with internal properties (for vertices, edges, and the graph itself) and write everything to a graphml file. The code compiles and works as it is, but my two questions are:

1. What dynamic property do I have to add to write the graph properties out to the graphml file as well? So far I could only figure out how to write vertex and edge properties.

2. Does everything else look good? Specifically, is it O.K. to define the properties the way I did in the first typedef line (without using boost::property<>), and is it O.K. to access the properties the way I do it?

typedef boost::adjacency_list<boost::listS, boost::vecS, boost::directedS, std::string, std::string, std::string> Graph;

Graph g;

vertex_t u = boost::add_vertex(g);

vertex_t v = boost::add_vertex(g);

edge_t e; bool b;

boost::tie(e,b) = boost::add_edge(u,v,g);

g[u] = "a_vertex_name";

g[v] = "an_other_vertex_name";

g[e] = "an_edge_name";

boost::get_property(g) = "the_graph";

boost::dynamic_properties dp;

dp.property("vertex_data", boost::get(boost::vertex_bundle, g));

dp.property("edge_data", boost::get(boost::edge_bundle, g));

std::ofstream graphmlOutFile("graph.xml");

boost::write_graphml(graphmlOutFile, g, dp, true);

graphmlOutFile.close();