The section “Language specification” of the documentation starts with the explanation of the attribute syntax, etc. which is never used, and is ever used only by Gospel developers, probably.
I suggest moving it to an appendix page.
I posted some comments in #57 back in 2021 after having given the documentation a read through - and started with a similar impression! I don't know if the other comments have been addressed.
The section “Language specification” of the documentation starts with the explanation of the attribute syntax, etc. which is never used, and is ever used only by Gospel developers, probably. I suggest moving it to an appendix page.