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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@inf.ed.ac.uk> 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@inf.ed.ac.uk
> 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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