Hi list, I am very interested in the graph library, which I am planning to use quite soon. My biggest concern is whether Graph Library can help me to find a minimum spanning tree in an *directed* graph with weighted edges. I know that for undirected graphs I can use either the Kruskal's algorithm or the Prim's algorithm, that Graph Library already provides. But what if I need to work with directed graphs? Please note (in case it helps): The problem that I am trying to solve does not require the use of weighted edges actually, I only need to enforce some constrains, giving absolute priority to some (directed) edges. I could just as well use Boolean flags instead of weights. Thanks in advance, Jim Xochellis This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail.