Hi friends - I just uploaded the first two of the metagraph libraries to the sandbox. These are * an mpl_graph for bgl-like graphs in c++ metaprogramming ( s/(/</ ) * a fusion_graph for basic heterogeneous-typed graphs where edges describe the links (pointers, containers of pointers) and vertices are the types of objects. There is a long way to go, but I wanted to post something in advance of BoostCon to invite conversation. The eventual idea is to make graphs-of-graphs, graphs that refer to other graphs, and graph layers of detail, all easy to specify and use. One would combine patterns such as "graph," "tree," or "chain," to build more complex data structures without resorting to inefficient overgeneralizations or unsafe ad-hoc methods. Along the way I will also offer Yet Another Reflection Mechanism: much as any graph data structure can be adapted as a Boost Graph, any system of objects which refer to one another can be reflected as a metagraph. What is available now just allows you to build systems of objects with pointers (or containers of pointers) to each other, which is mostly useful to library developers wanting to generate such types at compile time. They are not yet managed, by which I mean, all of the cross- referencing that naturally takes place in such systems has to be kept track of by the application, or by metagraph libraries yet to be written... Thanks in advance for any comments, references to related libraries, etc. Gordon