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Bob Foster scripsit:
> XML does not require parsers to support entities apart from validation
ObMemeStomping: This is not true. XML processors, validating or not,
must support internal entities that are defined in the internal subset.
Something I've long wanted to see is a tool that takes a full DTD
and squashes it down to the bare minimum required for use as an internal
subset to preserve all DTD infoset effects but *not* validity. In
particular:
1) Expand all parameter entities and eliminate all parameter entity
declarations
2) Eliminate all attribute declarations that are CDATA and either #IMPLIED
or #REQUIRED
3) Eliminate all element declarations that are ANY, EMPTY, or mixed content,
and simplify all element-content ones to <!ELEMENT foo (foo)> or
something of the sort
A reasonable implementation strategy would be to start with James Clark's
DTDinst program (http://www.thaiopensource.com/relaxng/dtdinst) and
then use XSLT (with text output mode) to generate the new DTD.
Anyone interested in tackling it?
--
In politics, obedience and support John Cowan <jcowan@reutershealth.com>
are the same thing. --Hannah Arendt http://www.ccil.org/~cowan
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