• From: Michael Glavassevich <mrglavas@c...>
• To: "Andrew Welch" <andrew.j.welch@g...>
• Date: Mon, 22 Sep 2008 12:04:49 -0400

"Andrew Welch" <andrew.j.welch@g...> wrote on 09/22/2008 10:38:22 AM:

> > <xs:element name='category' type='categoryType' />
> >
> > <xs:complexType name='categoryType' abstract='true'/>
> >
> > <xs:complexType name='privacy'>
> >   <xs:complexContent>
> >       <xs:extension base='categoryType'>
>
> Rather than extend from an abstract type, I think it's better to
> restrict from a loose type...  I think it benefits the validator in
> some way that I can't remember (that's suitably vague and
> non-committal :)  Hopefully someone who knows can back that up.
>
> > So, my answer to Ian is you can't exactly do what you want using XSD
>
> ...in XSD 1.0.  It's perfectly possible 1.1 isn't it?
>
> I think the XSD 1.1 license for Saxon is 30 quid, that's a round of
> drinks in London....

If you're feeling adventurous you could also try out the XML Schema 1.1 development branch [1] of Xerces. Support for xs:alternative was just recently implemented there.

> --
> Andrew Welch
> http://andrewjwelch.com
> Kernow: http://kernowforsaxon.sf.net/

[1] http://svn.apache.org/viewvc/xerces/java/branches/xml-schema-1.1-dev/

Michael Glavassevich
XML Parser Development
IBM Toronto Lab
E-mail: mrglavas@c...
E-mail: mrglavas@a...

• References:
  • Re: Use xsd to specify multiple instances of existing element
    • From: "Andrew Welch" <andrew.j.welch@g...>