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Re: Restrictions on existence of attributes?

• To: Michael Champion <mchampion@x...>
• Subject: Re: Restrictions on existence of attributes?
• From: Jirka Kosek <jirka@k...>
• Date: Fri, 30 Jun 2006 10:27:05 +0200
• Cc: Stan Kitsis <skits@m...>, xml-dev@l...
• In-reply-to: <44A49A67.2040207@x...>
• References: <7C80003DF5F4D640840D0D37250C143E01A1035F@R...> <44A303FA.10409@k...> <44A34133.8040507@x...> <44A37EC7.2050606@k...> <44A49A67.2040207@x...>
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Michael Champion wrote:

> Well, as a person at a big vendor who has the job of tracking the status 
> / mindshare / demand for various XML specs, I can tell you the reason:  
> Almost no demand by actual paying customers. This is not FUD;  Dare, and 
> Derek IIRC, I, and others have thought "cool, all I have to do is make a 
> business case and Microsoft will support RELAX NG and lead us out of the 
> XSD dark ages"   Trouble is, we just have nothing to work with to make 
> such a case.

Many newer grammars (e.g. DocBook 5, XHTML 2) are expressed in RELAX NG 
primary. If you create XSD or DTD from this RELAX NG schema, you must 
create more relaxed schema because some constraints expressible by RELAX 
NG can't be captured in XSD. This means that if you create instances 
which are valid against such XSD, they do not have to be valid against 
original intention of format specification (formally expressed in RELAX 
NG).

> It's not just us; I don't think XML Spy or Stylus Studio support RELAX NG either, AFAIK for the same reason. 

But oXygen does and it is more and more popular because of this. And I 
think that XML Spy can change its mind, especially after XML Prague 
where several people repeatedly asked for RELAX NG and Schematron 
support in XML Spy. :-D


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• References:
  • RE: Restrictions on existence of attributes?
    • From: "Stan Kitsis" <skits@m...>
  • Re: Restrictions on existence of attributes?
    • From: Jirka Kosek <jirka@k...>
  • Re: Restrictions on existence of attributes?
    • From: Michael Champion <mchampion@x...>
  • Re: Restrictions on existence of attributes?
    • From: Jirka Kosek <jirka@k...>
  • Re: Restrictions on existence of attributes?
    • From: Michael Champion <mchampion@x...>

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