Hi, Sorry if I missed anything in any FAQ. I would like to customize dfs so it would go over an edge only if satisfies certain properties. The library allows to take actions using visitors, but I haven't found a nice way to modify its decision so it would scan only part of the tree according to certain properties. I can change depth_first_visit_impl in depth_first_search.hpp or maybe define a new algorithm in a new namespace, but all I actualy want is something like my visitor returning false/true thus telling the algorithm whether to continue scanning an edge or not. Does anyone think of a nice way to do this? Or have I missed a feature already implemented in BGL? Any help would be appreciated, Thanks, Gil Shallom