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Re: Canonicalizer that uses XML Schemas (rather than DTDs)?

• To: "Roger L. Costello" <costello@m...>
• Subject: Re: Canonicalizer that uses XML Schemas (rather than DTDs)?
• From: Elliotte Harold <elharo@m...>
• Date: Wed, 24 Nov 2004 14:04:37 -0500
• Cc: xml-dev@l...
• In-reply-to: <200411241839.iAOId2m01009@s...>
• References: <200411241839.iAOId2m01009@s...>
• User-agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7.3) Gecko/20040910

Roger L. Costello wrote:

> Elliotte Rusty Harold wrote:
> 
> 
>>>Why would it matter that a canonicalizer tool utilize an
>>>XML Schema rather than a DTD?  Where would it make a difference?
> 

> Is it not time to update the XML canonicalization specification?  When
> everyone was using DTDs then canonicalization of just {XML, DTD} pairs made
> sense.  But now that many people are using XML Schemas it seems to me that
> canonicalization needs to be upgraded to support {XML, XML-Schema} pairs.

I fail to see the benefit of that. Stability is more important here. It 
is supposed to be a "canonical" form, after all; not the flavor of the 
month.

> Better yet, the canonicalization specification should be upgraded to handle
> all 5 Validation Languages:
> 
> 1. DTD
> 2. XML Schemas
> 3. RelaxNG
> 4. Schematron
> 5. OASIS CAM

I don't know what OASIS CAM is, but neither Schematron nor RELAX NG 
augments the Infoset in any way. Therefore they have no effect on 
canonicalization. This is a relative advantage for these two languages.

-- 
Elliotte Rusty Harold  elharo@m...
XML in a Nutshell 3rd Edition Just Published!
http://www.cafeconleche.org/books/xian3/
http://www.amazon.com/exec/obidos/ISBN=0596007647/cafeaulaitA/ref=nosim

• References:
  • RE: Canonicalizer that uses XML Schemas (rather than DTDs)?
    • From: "Roger L. Costello" <costello@m...>

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