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Subject: Re: [docbook] Re: DocBook Publishers DTD

Hi Norm,

You may find interesting Tim Bray's comment [1] on that in his annotated 
XML spec [2]:

[1] http://www.xml.com/axml/notes/Determinism.html
Deterministic Grammars

This stuff is not worth worrying about. This rule was inherited from 
SGML; its inclusion in SGML was actually a design error. This was 
retained in XML not only for compatibility with SGML (not quite a good 
enough reason; I voted against it) but because some of the most popular 
existing SGML tools actually rely on it for certain internal optimizations.

It's likely that quite a few XML products will never bother checking for 
violations of this rule, because it's hard; if you're writing a DTD and 
you get a complaint about a nondeterministic content model, then you 
might find it worthwhile to read the appendix.

[2] http://www.xml.com/axml/target.html#determinism

Best Regards,
George Cristian Bina
<oXygen/> XML Editor, Schema Editor and XSLT Editor/Debugger

On 4/2/10 2:18 AM, Norman Walsh wrote:
> Norman Walsh<ndw@nwalsh.com>  writes:
>> Here's a better version. I've fixed the duplicate attribute
>> declarations caused by attribute co-constraints and a number of other
>> little bugs. The dcterms: namespaced elements should also work better.
> Here's an even better still version. This now passes muster in Xerces
> and Saxon. Like the base DocBook DTD, I think it's interesting that
> nsgmls reports ambiguous content models that neither Xerces nor Saxon
> notice. For the moment, I'm not going to try to fix those, I'm not
> sure it's practical.
>                                          Be seeing you,
>                                            norm

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