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Re: Parameter entity references in WF docs

From: Bert Bos <bert@w3.org>
Date: Wed, 28 May 1997 22:03:52 +0200
Message-Id: <199705282002.QAA16297@www10.w3.org>
To: <w3c-sgml-wg@w3.org>

From: Tim Bray <tbray@textuality.com>

> I'm now putting PE reference handling in Lark, and it's turning
into
> quite a lot of code - since these things are just for DTD's, and
Lark
> is nonvalidating anyhow, I'm wondering if the extra processing and
code
> size required are in the spirit of XML, particularly for
lightweight
> standalone processing.  It seems like PE's are largely in the spec
to
> support authoring-end activities.
> 
> Would it be reasonable to think about saying either that
> (a) PErefs should not be used in the internal DTD subset, or
> (b) PErefs should not be used in WF docs?

There is a better solution, and even more in the spirit of XML:
define XML in such a way that no parser ever needs to parse a DTD.

That would leave the burden of parsing DTDs (and PEs) to certain
generic validators and generators. You don't need many of those, but
you do need hundreds of normal parsers.

This is not just a wish. I think this is absolutely necessary. Most
parsers *will* treat XML as if it didn't need a DTD and it is better
for interoperability if there is a spec for that format. Section 2.10
(Required markup declaration) of the latest working draft already
outlines the expected problems. That's OK for a draft, but eventually
the spec needs to solve them.


Bert
Received on Wednesday, 28 May 1997 16:03:05 UTC

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