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Re: question about restrictions

• To: "Chiusano Joseph" <chiusano_joseph@b...>
• Subject: Re: question about restrictions
• From: ht@i... (Henry S. Thompson)
• Date: Tue, 22 Jun 2004 12:23:46 +0100
• Cc: Brent Worden <brent@w...>, xml-dev@l...
• In-reply-to: <40D795ED.A2E970ED@b...> (Chiusano Joseph's message of "Mon,21 Jun 2004 22:14:05 -0400")
• References: <cb7mo8$n4m$1@s...> <40D795ED.A2E970ED@b...>
• User-agent: Gnus/5.1006 (Gnus v5.10.6) XEmacs/21.4 (Security ThroughObscurity, linux)

"Chiusano Joseph" <chiusano_joseph@b...> writes:

> I believe you found the cause in your explanation below - the
> restriction is not actually a restriction. You would have to - for
> example - change one of the maxOccurs facets from "unbounded" to "5" (or
> anything other than "unbounded").

Sorry, that's not a problem -- vacuous restriction is allowed.  I
don't know the details of the validator involved, but I would guess
that the problem is that you're using anonymous type definitions -- 
W3C XML Schema requires the type definition of an element in a restriction to be
the same as or derived from the type definition of the corresponding
element, and it only _guarantees_ identity for type definitions with
names.  So move that anonymous definition up to the top level, give it
a name, and refer to it _by_ name, i.e.

  <xsd:element name="FirstElement" type="myChoiceType"/>

in both base and restriction, and you should win.

ht
-- 
 Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
                     Half-time member of W3C Team
    2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
            Fax: (44) 131 650-4587, e-mail: ht@i...
                   URL: http://www.ltg.ed.ac.uk/~ht/
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