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Re: life support for DTDs? was RE: misprocessingname

• To: xml-dev@l...
• Subject: Re: life support for DTDs? was RE: misprocessingnamespaces)
• From: Mike Champion <mc@x...>
• Date: Fri, 01 Feb 2002 12:13:36 -0500
• In-reply-to: <F61xPMWvnhytOfOqxe500009f0f@h...>

2/1/2002 11:29:44 AM, "Wayne Steele" <xmlmaster@h...> wrote:

>
> Another way to go about
> it would be to have a special transformation to "namespace-
> normalize" the instance document. This version would be used for 
> DTD Validation. The ns-normalized version could then be discarded, 
> and the actual instance document presented to the user or 
> application for further processing.
>
>Nobody has done this though, because it would require:
>1. changes to existing validating parsers
>2. consensus on how to write DTDs that would work with this process 
(compare 
>DTDs for XML-Schema and XHTML for two different approaches).

Interesting idea.  DOM Level 3 does a good bit of this, 

a) providing a normalize method to clean up the namespace prefix:URI 
mappings -- although I'm not sure it cleans things up well enough to 
be useful for this job

b) provides an abstraction of both schemas and DTDs to allow in 
principle -- although again I'm not sure that the reality actually 
works well enough to really do what we want here -- validation of the 
normalized instance against a DTD rather than having the parse-time 
validation choke on the inconsistencies between DTDs and Namespaces.

I would encourage anyone interested in this use case to read the DOM 
Level 3 stuff and suggest tweaks that might support it. 

• References:
  • Re: life support for DTDs? was RE: misprocessing namespaces)
    • From: "Wayne Steele" <xmlmaster@h...>

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