Thank you very much for publishing this first draft, Arthur.
I saw that you added a "see also"-reference to SRFI 148. While SRFI 148
could have made good use of SRFI 188, another reference would be SRFI 93
(the SRFI on syntax-case macros, which was withdrawn in the process of
finalizing R6RS)
Scheme Request for Implementation 188,
"Splicing binding constructs for syntactic keywords,"
by Marc Nieper-Wißkirchen,
is now available for discussion.
Its draft and an archive of the ongoing discussion are available at
https://srfi.schemers.org/srfi-188/.
You can join the discussion of the