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Re: Non-schema attributes

From: Henry S. Thompson <ht@cogsci.ed.ac.uk>
Date: 25 Mar 2003 08:38:06 +0000
To: "Alessandro Triglia" <sandro@mclink.it>
Cc: <xmlschema-dev@w3.org>
Message-ID: <f5badfjg7td.fsf@erasmus.inf.ed.ac.uk>

"Alessandro Triglia" <sandro@mclink.it> writes:

> Hi
> 
> I have a question about the use of non-schema attributes in schema
> documents.
> 
> Since all schema element declarations contain an attribute wildcard with
> a namespace constraint of ##other, I understand that:
> 
> - any attributes are allowed on these elements, besides the attributes
> declared in the Schema for Schemas, provided that they don't belong to
> the XML Schema namespace. In particular, *unqualified* attributes are
> allowed.
> 
> Is this correct?   

No.  ##other means "qualified with a namespace other than the target
namespace."

> If yes, I understand that the following schema document is valid:  
> 
> --------------------------------------------------------------
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
>             xmlns:xhtml="http://www.w3.org/1999/xhtml"
>             xmlns="http://www.example.com"
>             targetNamespace="http://www.example.com">
>   <xs:element name="elem1" age="42" type="Address"/>
>   <xs:element name="elem2" type="xhtml:blockquote"/>
>   <xs:attribute name="attr1"
>       	  type="xsl:quantity"
> 	        targetNamespace="http://www.example.com"/>
> </xs:schema>
> --------------------------------------------------------------

> Notice the attributes   "age"  on the first "element" element and
> "targetNamespace"   on the "attribute" element.  Both of these
> attributes are obviously meaningless, but are they actually forbidden?

Yes, they're forbidden.

ht
-- 
  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@cogsci.ed.ac.uk
		     URL: http://www.ltg.ed.ac.uk/~ht/
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Received on Tuesday, 25 March 2003 03:38:09 GMT

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