DTD inheritance?

[Don Kackman]

Hello,

I've got two document types with associated DTDs. The first is a subset
of the second. I don't want to merge these two DTDs into one file but
also don't want to maintain both files seperately.

Is it possible to include one DTD in another through an external entity
reference? If so how?

Also if so, can I declare additional attributes in the second DTD for
elements originally declared in the first?

Thanks a lot,

Don Kackman
dkackman at agchem.com


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