Quoting Aubrey Jaffer <xxxxxx@alum.mit.edu>:
> SRFI-47 should be modified (if that is possible) or replaced after we
> are finished with SRFI-58.

Only small changes such as typos can be made after finalization.  However,
you're welcome to submit a new SRFI and a note can be added to SRFI-47 that it
has been
superseded.

David