[mkgmap-dev] Documenting the various sorts of file

The current help doesn't explain what sorts of files can be processed. What documentation there is seems to be scattered, and difficult to discover. Having skimmed the source, it looks as if FileKind.java is the place where the various sorts are handled. I am not quite sure where the test-map:all-elements and test-map:test-points fit in. Is there any chance that someone who knows the source properly could enhance the help messsage? Or document it somewhere else. ael