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   Re: Inheritance between DTD's ?

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  • From: "Steven R. Newcomb" <srn@techno.com>
  • To: jim.blackwell@gsfc.nasa.gov
  • Date: Mon, 22 Jun 1998 11:03:01 -0500

[Jim Blackwell:]

> I am in the process of writing a proposal to do some XML development and
> I had a question that I could not find the answer to (so far).

> Is there any sort of "Inheritance" between DTDs ?  For example, say you
> have some smaller DTDs and wish to merge them into another larger DTD
> that is more specific.

W3C hasn't decided how to recommend that this be accomplished, but
there is a well-developed ISO standard that is applicable to both SGML
and XML.  The paradigm is variously called "architectural forms
(AFs)", "architectural form definition requirements (AFDR)",
"inheritable SGML architectures", etc.

I'm sending you some material and references that will help you
understand this paradigm and how to use it in an XML context.  It is
implemented in the SP parser.  Other systems and tools are being


Steven R. Newcomb, President, TechnoTeacher, Inc.
srn@techno.com  http://www.techno.com  ftp.techno.com

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