On 11/15/11 7:40 PM, Tom Lane wrote:
> Peter Geoghegan <peter(at)2ndquadrant(dot)com> writes:
>> If we can't put isn out of its misery, a sensible compromise would be
>> to rip out the prefix enforcement feature so that, for example, ISBN13
>> behaved exactly the same as EAN13.
>
> That might be a reasonable compromise. Certainly the check-digit
> calculation is much more useful for validity checking than the prefix
> checking.
Sounds good to me. FWIW, I know that ISBN is being used for some
library software, so a backwards-compatible fix would be very desirable.
--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com