I've just published draft #4 of SRFI 168.  It was submitted by
Amirouche Boubekki, author of the SRFI.

  <https://srfi.schemers.org/srfi-168/>

Here are the commit comments on this draft:

  - s/n-tuple/tuple/
  - s/n-tuple/tuple/ (#3)
  - Various changes
  - remove 'okvs-transactional' use.
  - update sample implementation with tests
  - Publish fourth draft.

Here's the diff:

  <https://github.com/scheme-requests-for-implementation/srfi-168/compare/d103ffc795f81259e30a5d798c65f6046ee1070b..4f770ee8d49950cfb6d0b073ae35d5c6fc8ffe12>

Regards,

SRFI Editor