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Re: xlink

From: Tobias Reif <tobiasreif@pinkjuice.com>
Date: Sun, 29 Jun 2003 19:12:12 +0200
Message-ID: <3EFF1DEC.1020800@pinkjuice.com>
To: www-svg@w3.org
CC: Chris Lilley <chris@w3.org>

Chris Lilley wrote:

 > TR> especially if they leave
 > TR> the document's infoset alone.
 > Can you elaborate on that last point?

DTD can change attribute values, thus the document itself, which brings 
several problems with it [dtd-troubles]. RNG on the other hand knows 
about these troubles, and explicitly does not offer features which 
change the document's information set [rng-goal].


A schema language should offer features useful for validation; 
modification of instances is clearly outside this domain.
When I have a tool for processing documents of a certain class of 
documents (docs adhering to a certain abstract schema (possibly 
represented by multiple schema instances written in different schema 
languages)), then including or omitting a DTD doctype declaration can 
break the tool, change the output, or cause havoc of other sorts. And 
the document can be different for validating or non-validating parsers.

RELAX NG is a schema language for XML. The key features of RELAX NG are 
that it:
* does not change the information set of an XML document"

Received on Sunday, 29 June 2003 13:12:37 UTC

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