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   Re: External Parameter Entities for Reuse?

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  • From: "G. Ken Holman" <gkholman@CraneSoftwrights.com>
  • To: XML Dev <xml-dev@ic.ac.uk>
  • Date: Thu, 18 Nov 1999 14:28:03 -0500

At 99/11/18 12:21 -0600, Barton Stanley wrote:
>In a somewhat similar vein, I am interested in people's experience with 
>employing external parameter entities as a declaration reuse 
>mechanism.  In other words, is it advisable to use a common set of 
>declarations (i.e. a single, physical entity) across multiple document 
>type definitions?

It is in my environments.

>Why or why not?

(1) - it allows me to parameterize the declarations of internal general 
entities by using marked sections in external parameter entities (though 
typically for only one model for parameterization reasons and not different 
models for reuse reasons)

(2) - it allows me to collect internal general entity declarations by topic 
(useful for reuse)

(3) - it allows me to include a "package" of declarations under the purview 
of others (e.g. the OASIS Table Model) ... (also useful for re-use)

I don't think I've put the element and attribute declarations for a given 
document model into more than one physical file when I'm responsible for 
the entire DTD, but if it were *really* big I would either do so or 
question why my model was so large.

........... Ken

G. Ken Holman                    mailto:gkholman@CraneSoftwrights.com
Crane Softwrights Ltd.             http://www.CraneSoftwrights.com/x/
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