>> (Arthur, would you in fact be amenable to maintaining my spreadsheet
>> permanently if and when the time comes?  It would just mean adding rows
>> when new SRFIs specified that they should be serializable to a binary
>> format.)
>
> Certainly.  It doesn't sound like a lot of work, and if Scheme
> implementers decide to support your design, having a registry will be
> helpful.

This is a good idea.

In a similar spirit, I suggested that symbols registry a while back but
it didn't receive a warm welcome :) Perhaps because new symbols can be
added to the enumerations used by existing SRFIs, where as new data
types are not added after the fact.

As usual, I'd be in favor of cross-Lisp-dialect cooperation here. We
could do a review of all data types in all current Lisp dialects. I'd
guess not many are missing from John's spreadsheet.