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Re: Re: How to redesign W3C XML Schema (Was: Remembering the o

• To: Jochen Wiedmann <joe@i...>
• Subject: Re: Re: How to redesign W3C XML Schema (Was: Remembering the original XML vision)
• From: "Chiusano Joseph" <chiusano_joseph@b...>
• Date: Tue, 18 Feb 2003 14:39:57 -0500
• Cc: Kohsuke Kawaguchi <Kohsuke.Kawaguchi@S...>, xml-dev@l...
• Organization: BAH
• References: <5.2.0.9.0.20030215153127.01122d98@n...> <1045470470.3e509d06a6f80@w...> <20030218085530.C212.KOHSUKE.KAWAGUCHI@s...> <1045596491.3e52894bc1bd9@w...>

<Excerpt1>
Why is it so difficult to mix multiple namespaces?
</Excerpt1>

Not sure what you mean by this - are you referring to the fact that a
W3C schema can have only one target namespace? Or perhaps the multiple
attributes (namespace prefix declaration and schema location) that
appear in the root element of a schema?

<Excerpt2>
A schema A can include B. Excellent! But why can A use components from
schema B?
</Excerpt2>

Not sure what you mean by this.

<Excerpt3>
Why the nonsense with "final" and "block"?
</Excerpt3>

Not sure what "nonsense" you mean - these attributes have well-defined
and useful application.  The "final" attribute is used to prohibit
complex datatype derivation, while the "restriction" attribute is used
to prohibit the use of derived complex datatypes.  There are distinct
cases in which these are needed.

Joe Chiusano
Booz | Allen | Hamilton
Jochen Wiedmann wrote:
> 
> Hi, Kohsuke,
> 
> Quoting Kohsuke Kawaguchi <Kohsuke.Kawaguchi@S...>:
> 
> > Just out of curiosity, why aren't you interested in supporting other
> > languages, if you don't think XML Schema makes sense?
> 
> I do not refuse all aspects of XML Schema. For example the
> distinction between sequences, choices, all and group is
> well choosen. So are most of the basic data types, the
> facets or the mechanism of restriction. My personal impression
> is that would make a nice and much more powerful replacement
> for the DTD.
> 
> But unfortunately that wasn't sufficient. For example: Why is
> it so difficult to mix multiple namespaces? IMO the target
> namespace as a default would have been completely sufficient,
> without enforcing anything. Another example: The "any" type -
> I still do not really understand how many flavours of "any"
> there are. Next example: A schema A can include B. Excellent!
> But why can A use components from schema B? Why the nonsense
> with "final" and "block"?
> 
> However, fact is, we *have* XML Schema. Vendors are backing
> it (for example, Sun :-) and I suppose they won't be interested
> in moving their tools to Schematron or Relax NG. However,
> a lite version might find agreement.
> 
> Jochen
> 
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• Follow-Ups:
  • Re: Re: How to redesign W3C XML Schema (Was: Remembering the original XML vision)
    • From: Jochen Wiedmann <joe@i...>

• References:
  • Re: How to redesign W3C XML Schema (Was: Remembering the original XML vision)
    • From: Jonathan Robie <jonathan.robie@d...>
  • Re: How to redesign W3C XML Schema (Was: Remembering the original XML vision)
    • From: Jochen Wiedmann <joe@i...>
  • Re: How to redesign W3C XML Schema (Was: Remembering the original XMLvision)
    • From: Kohsuke Kawaguchi <Kohsuke.Kawaguchi@S...>
  • Re: How to redesign W3C XML Schema (Was: Remembering the original XML vision)
    • From: Jochen Wiedmann <joe@i...>

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