XSLT and XSchema (was Re: [xsl] keys and idrefs - XSLT2 request?)

[Joerg Pietschmann <joerg dot pietschmann at zkb dot ch>]

David Carlisle <davidc@nag.co.uk> wrote
> Knowing an attribute is a date is good, I'd hope to use date arithmetic
> in XPath 2, but I can't imagine ever wanting to (for example) match
> elements by some complex schema type rather than name.

Hmm, this makes me think. While trained as mathematican, i'm
probably working in business software too long:
- define a complex data type "adress"
- use it under various names, which usually denote roles (excuse
  the pseudo schema code, can't be bothered to look up the exact
  syntax :-)

  element address
    name: string
    zip: string
    city: string
    ...

  element order
   residentaddress : address
   shippingaddress : address
   ...

Am i mistaken that a valid XML instance would look like
the following?
 <order>
  <residentaddress>
   <name>...</name>
   ...
  </residentaddress>
  <shippingaddress>
   ...
 
If so, matching the type "address" might be preferable to
writing a template for every address role, or dispatching
via <apply-template select="*[contains(name(),'address']"
   mode="address"/>
or something.
I do not claim that the schema above is actually well designed,
if there are alternatives, i'd like to hear about them.

Regards
J.Pietschmann

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