Actually, I thought your point was the file was coming from something other than the file system. Totally did not understand what you meant, which is why I asked for an example.

I had made a similar point when discussing the transformation rules. It would be better to define what input is required to define a pair (i.e., a namespace prefix and a filesystem path) and the result of transformation (the prefix replaces the filesystem path; each subfolder is separated by a slash and the .php removed from the class file) -- but not delve into the transformation, itself.

Much of that wording has been cleaned up. Might be good to start with a new draft.