E.g. what does this mean:
F0 00 01 5F 7A 1E 00 01 00 02 30 09 7E 1C 00 00 F7
The message "F0 00 01 5F 7A 1E 00 01 00 02 30 09 7E 1C 00 00 F7" means load preset #10.
The documented sysex messages so far are load presets 1-16, tether mode on, tether mode off, and LED toggle.
All of these start with "F0 00 01 5F 7A 1E 00 01 00 02" so that is something of a header.
Fields seem likely to include actually memory addresses in the firmware that are targeted for writing, so it is possible there is not a consistent mapping between firmware versions as new fields are added, and thus documenting everything would be problematic.
Detailed patch data seems to be writable only in bulk, as a complete patch.
Plus a small number of global parameters such as patch select and tether mode, as mentioned. It seems these global parameters can be presumed to remain constant across firmware releases.