Food for thought when reflecting upon online communities and information spaces. The various IndexingSchemes might be construed as paths, but then maybe not -- one must step off the "path" to journey along it (hmm, just got a new idea, see PathsInHypermedia). Pages would be nodes, unsuprisingly. Does Meatball have districts? Would that be categories? I think Meatball doesn't have edges, although UseMod supports them with it's /subpage functionality. Does Meatball have landmarks? Yes - RecentChanges and the other pages listed in the link banner.