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On Thu, Jul 18, 2002 at 07:42:37AM -0600, Matt Gushee wrote: > On Thu, Jul 18, 2002 at 09:22:32AM -0400, Yallala, Bhaskar wrote: > > > > I have a DTD file in which I have element A which has two attributes with > > IDREF properties. > > Now while creating xml file using DTD, how can I refer attribute IDREF > > defined in another xml file? > > You can't. That is a limitation of DTDs: IDs must be unique *within a > given document*, and IDREFs must refer to an ID in the same document. > If you want to enforce--hmm, I'm going to say "referential integrity," > borrowing from the database world--if you want to enforce that across > separate documents, you need to do it in your application, Hmm, I'm not sure that part was completely clear. What I mean is that in order to accomplish what you want to do, you would need to define an attribute of type CDATA or NMTOKEN--let's say it's called 'externalIDRef', though it could be called whatever you want--and the application processing your documents needs to understand that that attribute is supposed to refer to an ID in another document. -- Matt Gushee Englewood, Colorado, USA mgushee@h... http://www.havenrock.com/
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