Some time ago there was a plan
to include some kind of Graph Language to MPS.
Apparently, this feature was not 100% ready by MPS 2.0 release, but there a lots of traces of Graph Language in MPS-src.zip:
E.g. in MPS-src.zip\jetbrains\mps\graphLayout\graph\
one can find a nice framework for Graph Structure or even implementation of Dijkstra algorithm. All with world-famous /**Generated by MPS**/ header =)
Current source distribution does not include MPS source files for this graph language, only generated Java files, that are not used nor compiled to MPS.jar.
Currently I don't need any MPS built-in view/layout of the graph. I'm fine with exporting it to GraphVis. Is it possible to get at least Structure/Algorithm parts of this language in MPS-usable format?