Jeff Holle wrote:

I would like to write a "generic" routine that prints the named vertex and edges properties.

Eeh... you must mean (name,value) pairs from graphvis graph?

I can see in this code sibit (from graphviz.cpp) that the info that I want is present:

...

vertex_label(const Vertex& u, const GraphvizDigraph& g) { boost::property_map::const_type va = boost::get(boost::vertex_attribute, g); return (*(va[u].find("label"))).second; }

It appears that va is a map >

Yep.

How would I write code that prints the names of the properites of a given vertex? (It would involve iterating over the map whose find method is used in the above code segment).

In the code above, "va[u]" has the type std::map. You can just iterate over all elements of that map, printing keys: boost::property_map::const_type va = boost::get(boost::vertex_attribute, g); const map& m = va[u]; for (const map::const_iterator i = m.begin(); i != m.end(); ++i) std::cout << i->first << "\n"; Is it what you're after? - Volodya