[Boost-users] Boost graph write_graphml

I am having troubles figuring out how to use write_graphml from the documentation. My problem is in creating the dynamic_property. To access my vertex properties i use this: VERTEXPROPERTIES& properties(const Vertex& v) { typename property_map::type param = get(vertex_properties, graph); return param[v]; } where VERTEXPROPERTIES is a type of a structure that i use for vertex properties. how would i go about creating a dynamic_property from that property map? Regards! Ted