This is the protocol buffers schema used for creating game simulations for Begriffix, a verbal strategic game. It defines input configuration and output results. Simulation messages can be passed to Hangman which runs the games and produces result messages.
The schema can be used in any environment which supports protocol buffers. In my projects, I include it as a git submodule. For example usage, see my R package.
The schema is documented, but I havent found a tool which handles subsubmessages. You can inspect the comments in the SimulationSchema.proto file.