Thanks Bob, somehow I just managed to read through the doc you linked to earlier - not sure if my Internet connection just wasn’t working or if I overlooked it earlier. Very good doc at any rate!
I think the notes about the tildes (~) that you mentioned and the Ti both came from reading the source code, though could be mistaken.
@davidsrsb - The TODOs are things that weren’t required to accomplish my immediate goal (making a set of symbols for some Atmel SAM parts). So I agree 100% that the doc is not complete, but it does contain enough to make a script for generating parts for instance. I guess if the plan is to change the format anyways, it’s probably not worth putting effort in to making a full format description just for the sake of completeness?