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RE: anyAttribute

  • From: dmaze@u...
  • To: Brad Harper <brad.harper@e...>
  • Date: Wed, 2 May 2007 17:51:49 -0400

RE:  anyAttribute

It means that you can put any attribute into the schema document itself -- provided (namespace="##other") that those attributes are in neither the null namespace nor XML Schema's namespace.  In the example you gave your "extra" attributes are in the null namespace, so that's invalid.

(And as Michael Kay pointed out, putting extension attributes into the schema itself doesn't have any effect on the validation process unless the validator somehow knows about them; it won't cause the attribute to appear in the validated document, for example.)

David Maze
Engineer, IBM WebSphere DataPower SOA Appliances
One Rogers Street, Cambridge, MA 02142
Phone: 617-693-1306  Fax: 617-693-5541

From: Brad Harper <brad.harper@e...>
To: xml-dev <xml-dev@l...>
Date: 05/02/2007 05:37 PM
Subject: RE: anyAttribute


So the fact that <anyAttribute> appears in the W3 XMLSchema's schema
doesn't mean that an arbitrary attribute of my own making may be
introduced into a schema conforming to the W3 schema.

If I placed <anyAttrbute> in *my* schema, I would expect that instance
documents would be able to contain attributes that aren't explicitly
defined by my schema.

I'd expect the same to be true for my schema, which is merely an
instance document of the W3 schema.


> -----Original Message-----
> From: Michael Kay [mailto:mike@s...]
> Sent: Wednesday, May 02, 2007 4:21 PM
> To: Brad Harper; 'xml-dev'
> Subject: RE: anyAttribute
> >
> > Have I mis-interpreted the schema schema?
> >
> Yes. You can add your own attributes to elements in a schema,
> but they don't mean anything unless you write a schema
> processor that attaches meaning to them. They certainly
> aren't equivalent to adding an <xs:anyAttribute> element to a
> complex type definition.
> Michael Kay
> http://www.saxonica.com/


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