So you are planning to take this proposal forward?
I read your proposal and thought you were trying to formalise a whole bunch of human-readable values.
If your proposal is just about the basics, e.g. how to tag position, direction and id, then you can reduce the proposal in length by about 80%…
It would be good if you could make it clear what you are actually proposing: which new tags you are introducing, which existing “in use”/“de facto” tags you are formalising, and which tags, if any, you are deprecating.