[Boost-users] Dangling edges in BOOST graph library

Hi, I am developing an application for which I need to define edges that have only one of the node defined. The second node is not defined. Does BOOST allow to do this? I know this is not the definition of a graph and is considered illegal in defining a graph. I want to know whether this functionality is available in BOOST graph library. Thanks and Regards, Abhijit Deshmukh