how can use xml-scheme to choose some attribute?

hi,
I have a xml-scheme file.
One element ("resource") can have 2 Attributes "id" and either "location" or
"external". But in my Scheme you are allowed to use both or nothing. (id is
required and not the problem)

How can force somebody to choose between these two attributes.

thanks in advance
Mario Brust

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System Development
VIRBUS AG
Fon   +49(0)341-979-7435
Fax   +49(0)341-979-7409
mario.brust@virbus.de
www.virbus.de

Received on Monday, 16 July 2001 05:31:36 UTC