Hi Erik, Here are a couple examples files to look at: example/edge_property.cpp example/vertex-name-property.cpp also, around page 50 of the BGL book discusses this. There are basically two ways to initialize the internal property data. One way is to create a property object (as shown in edge_property.cpp) and pass that into add_edge or add_vertex. The other way is to just use the normal add_edge/add_vertex and then use the operator[] or put() with the correct property map to assign values. Cheers, Jeremy On Mon, 24 Jun 2002, Erik Arner wrote: yg-boo> yg-boo> Hi, I'm just starting to learn how to use BGL, and have a few questions. yg-boo> Help would be much appreciated. yg-boo> yg-boo> I'm currently trying to understand the add_vertex function where yg-boo> properties can be assigned to the vertices as the graph is constructed. yg-boo> The only info I've managed to find on the website is this: yg-boo> yg-boo> --------- yg-boo> vertex_descriptor yg-boo> add_vertex(const VertexProperties& p, yg-boo> adjacency_list& g) yg-boo> yg-boo> Adds a vertex to the graph with the specified properties. Returns the yg-boo> vertex descriptor for the new vertex. yg-boo> --------- yg-boo> yg-boo> Does anybody have any examples on how to use this? More specifically, yg-boo> consider the following. I want to construct a graph dynamically, i.e. yg-boo> the graph will grow and shrink during runtime. Let's say I have a Node yg-boo> class with one member (which I want to represent as an "internal yg-boo> property") as follows: yg-boo> yg-boo> class Node { yg-boo> public: yg-boo> std::string name; yg-boo> }; yg-boo> yg-boo> And an Edge class, again with internal properties: yg-boo> yg-boo> class Edge { yg-boo> public: yg-boo> int weight1; yg-boo> double weight2; yg-boo> }; yg-boo> yg-boo> Then my graph object would look something like this, right? yg-boo> yg-boo> typedef adjacency_list yg-boo> < vecS, vecS, directedS, yg-boo> property < vertex_name_t, std::string >, yg-boo> property <edge_weight_t, int, property <edge_weight2_t, double> > > yg-boo> Graph; yg-boo> yg-boo> Where do I go from here? That is, if I have a Node or Edge object in my yg-boo> hand, with members as specified above, how do I add it to the structure yg-boo> (provided that additional info is available regarding which Nodes to yg-boo> connect with the Edge)? yg-boo> yg-boo> I would be very grateful for any help on this. Also, pointers to good yg-boo> (online) tutorials and documented examples of using the BGL, aside from yg-boo> the ones on boost.org, would be appreciated. yg-boo> yg-boo> Thanks, yg-boo> Erik yg-boo> yg-boo> yg-boo> yg-boo> yg-boo> Info: <http://www.boost.org> yg-boo> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> yg-boo> Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> yg-boo> yg-boo> yg-boo> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ yg-boo> yg-boo> ---------------------------------------------------------------------- Jeremy Siek http://php.indiana.edu/~jsiek/ Ph.D. Student, Indiana Univ. B'ton email: jsiek@osl.iu.edu C++ Booster (http://www.boost.org) office phone: (812) 855-3608 ----------------------------------------------------------------------