DocBook/XML catalog question

[Jeroen Ruigrok/asmodai <asmodai@in-nomine.org>]

Hi,

a quick question since I help maintain DocBook/XML for pkgsrc.org.

DocBook/XML 4.1.2 - 4.4 are all backwards compatible, does this mean that I
can just add this to catalog.xml:

<public publicId="-//OASIS//DTD DocBook XML V4.3//EN"
  uri="docbookx.dtd"/>
	   
<public publicId="-//OASIS//DTD DocBook XML V4.2//EN"
  uri="docbookx.dtd"/>
	   
<public publicId="-//OASIS//DTD DocBook XML V4.1.2//EN"
  uri="docbookx.dtd"/>

This is what some people are suggesting.  I am a bit hesitant to do this,
due to the fact that if you explicitely want to validate against 4.1.2 or
4.2 you will have a bit wider specification if you use 4.4's DTD.

Or wouldn't it matter that much?

Any insight welcome...

Thanks,

-- 
Jeroen Ruigrok van der Werven <asmodai(-at-)in-nomine.org> / asmodai
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spiritual and the intelligent -- herein lie the techniques of Tao of
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