HP-41 extended memory file types

[hth]

HP defined three file types in the extended memory, Data, ASCII and Program.
This was added on by the CCD module. According to "Extend your HP-41", the following mappings are used by the CCD module:
4 - matrix
5 - I/O Buffers
6 - Key assignments

Interestingly, I have a (never released) CAT replacement code that uses the following (opposite mapping):
5 - Key assignments
6 - I/O Buffers
I kind of wonder why it is swapped in my code, as I got the matrix at the same position (4).

Is there a comprehensive list somewhere that shows all file types that have been defined somewhere by the community?

Do we have a need for additional file types? (ROM compressed, ROM uncompressed, WALL, others?)