xml-dev - Re: XML Schema?

[Rick JELLIFFE <ricko@geotempo.com>]

"Henry S. Thompson" wrote:
> 
> Rick JELLIFFE <ricko@geotempo.com> writes:

> >  2) type is directly keyed from the element name (or an xsi:type
> > attribute), which does not allow the user-friendly markup idiom of where
> > the element name gives the basic type of the element and an attribute
> > declares the subtype; instead, if one wants subtyping, one has to make
> > an explicit new element named for that--one must have <textInput> rather
> > than <input type="text">...
> 
> This is misleading at best: This style of document is somewhat
> _better_ supported by XML Schema than it is by DTDs -- you can
> perfectly well write <input type="text">...</input> in a schema-valid
> document, and in some cases you can even organise things so that the
> content validated thereunder is validated differently to e.g. the
> content of <input type="hamAndEggs">...</input>.
 
Henry, are you saying that in XML Schemas, a schema-defined attribute
specified by a user in an instance (apart from xsi:type) can ever select
the type or facet of the value of that element or of another
attribute?     

Can you give an example?  (Note, I am not talking about fixed or
defaulted values from a schema documenting the current type. That is
something quite different. I mean keying {i.e. selection} of type.)


Rick.

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