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Re: derivation in WXS

• To: "Jeff Greif" <jgreif@a...>
• Subject: Re: derivation in WXS
• From: ht@c... (Henry S. Thompson)
• Date: 25 Nov 2002 15:33:18 +0000
• Cc: <xml-dev@l...>
• In-reply-to: <057801c2911e$377d7350$af00a8c0@jmg>
• References: <057801c2911e$377d7350$af00a8c0@jmg>
• Sender: ht@i...
• User-agent: Gnus/5.0808 (Gnus v5.8.8) XEmacs/21.4 (Military Intelligence)

"Jeff Greif" <jgreif@a...> writes:

> I was unable to determine the answers to these questions by reading
> the 'Structures' part of XML Schema,
> http://www.w3.org/TR/xmlschema-1
> 
> 
> 1. Given types B, E, and R where E is an extension of B, and R is a
> restriction of E, is R a restriction or extension of B, or neither?
> 
> 2. Similarly, given B, E, and R where R is a restriction of B and E
> is an extension of R, is E a restriction or extension of B or
> neither?
> 
> 3. For the most derived type in each chain (R in the first and E in
> the second), when is it allowed and when prohibited by {prohibited
> substitutions} on B?
> 
> 4. For the most derived type in each chain (R in the first and E in
> the second), when is it allowed and when prohibited by {disallowed
> substitutions} on some element declared to have type B?  That is,
> with what values of {disallowed substitions} will such an element
> validate with an xsi:type of R and E respectively, and with what
> values will it not validate?

Those interested might like to know that Jeff's questions were
well-answered by Jeni Tennison on xmlschema-dev [1].

ht

[1] http://lists.w3.org/Archives/Public/xmlschema-dev/2002Nov/0119.html
-- 
  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2002, part-time member of W3C Team
     2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
	    Fax: (44) 131 650-4587, e-mail: ht@c...
		     URL: http://www.ltg.ed.ac.uk/~ht/
 [mail really from me _always_ has this .sig -- mail without it is forged spam]

• References:
  • derivation in WXS
    • From: "Jeff Greif" <jgreif@a...>

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