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Re: XML Schemas

• To: "Henry S. Thompson" <ht@i...>, xml-dev@l...
• Subject: Re: XML Schemas
• From: Richard Lainchbury <freexe@g...>
• Date: Thu, 27 Oct 2005 16:33:56 +0100
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• In-reply-to: <f5bzmovgess.fsf@e...>
• References: <2cbc8d0a0510270234g65af59c7t@m...> <f5b7jbzhy4d.fsf@e...> <2cbc8d0a0510270811l44a22c86r@m...> <f5bzmovgess.fsf@e...>

well for example

<input type="image" /> has to have the attribute @src

but

<input type="hidden" /> can't have the attribute @src

so you could write <input type="hidden" src="images/button.png"/>
which wouldn't be valid, but impossiable to write a schema for.



On 27/10/05, Henry S. Thompson <ht@i...> wrote:
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> Richard Lainchbury writes:
>
> > Does that mean that you would never beable to write a schema for xhtml?
>
> Um, why would it mean that?  The example you gave, of <input
> type='...'/>, has no content, so there's not much to constrain.  Some
> of the other attributes on <input> are type-specific, but neither SGML
> nor XML DTDs allowed you to constrain those either -- the only
> constraints are provided in the prose of the REC.  There is already
> a W3C XML Schema which reconstructs the DTD for XHTML [1]
>
> Are you thinking of schematron rules for those attribute-interaction
> constraints?
>
> ht
>
> [1] http://www.w3.org/TR/2004/WD-xhtml-modularization-20040218/schema_module_defs.html#a_schema_module_defs.
> - --
>  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/
> [mail really from me _always_ has this .sig -- mail without it is forged spam]
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• References:
  • XML Schemas
    • From: Richard Lainchbury <freexe@g...>
  • Re: XML Schemas
    • From: ht@i... (Henry S. Thompson)
  • Re: XML Schemas
    • From: Richard Lainchbury <freexe@g...>
  • Re: XML Schemas
    • From: ht@i... (Henry S. Thompson)

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