[galaxy-dev] Searching tool shed for file format definitions?

Hello all, I was wondering how people keep track of the available file format definitions in the tool shed(s)? For core file types defined in Galaxy, I can just view the datatypes_conf.xml file and/or the classes in lib/galaxy/datatypes/ - but how can I do something similar on a Galaxy Tool Shed? One solution might be automatic functional categories: tool shed repositories which define a format, or define a tool for the user, or define a dependency for use by other tools, etc Thanks, Peter