XLink attributes in a Schema

Hi!

I am working on a projekt and i have to integrate XLink attributes in several Schema. I imported the xlink namespace and used the following tag: 

<xs:anyAttribute namespace="http://www.w3.org/1999/xlink"/>  

That worked fine. But sometimes i wanted to use only one attribute, like xlink:href. In this case i tried to use

<xs:attribute ref="xlink:href" use="required" />.

If i used this tag, my validator would throw an error, because of the namespace prefix. Why didn´t this tag work? Can you help me?

Regards and thanks,
Axel Billen


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