• To: "Henry S. Thompson" <ht@c...>
• Subject: Re: having problems with the "|" in field's element in the xs:key el ement
• From: John Cowan <cowan@m...>
• Date: Thu, 22 May 2003 07:05:42 -0400
• Cc: xml-dev@l...
• In-reply-to: <f5bfzn7tgbm.fsf@e...>
• References: <4827EC373E03DB44AC2AB3900430896B672268@c...> <f5bfzn7tgbm.fsf@e...>
• User-agent: Mutt/1.3.28i

Henry S. Thompson scripsit:

> Nothing in the REC requires processors to do static analysis of a
> schema with keys in it to determine if the keys are in principle
> satisfiable.  This is a hard problem, and it didn't seem necessary to
> require processors to solve it.

Indeed, if I correctly understand the literature I've read on the subject
(and I may not, as much of it is too mathematical for me), this demand is
worse than hard: it's impossible in principle.

-- 
Dream projects long deferred            John Cowan <jcowan@r...>
usually bite the wax tadpole.            http://www.ccil.org/~cowan
        --James Lileks                  http://www.reutershealth.com

• References:
  • RE: having problems with the "|" in field's element in the xs:key el ement
    • From: Jeff Lowery <Jeff.Lowery@c...>
  • Re: having problems with the "|" in field's element in the xs:key el ement
    • From: ht@c... (Henry S. Thompson)

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