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Re: [xml-dev] The XML 1.1 Candidate Recommendation is published (fwd)

From: John Cowan <jcowan@reutershealth.com>
Date: Wed, 16 Oct 2002 18:21:05 -0400 (EDT)
Message-Id: <200210162233.SAA14476@mail2.reutershealth.com>
To: www-xml-blueberry-comments@w3.org

David Carlisle scripsit:
From cowan  Wed Oct 16 10:48:14 2002
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From: David Carlisle <davidc@nag.co.uk>
To: jcowan@reutershealth.com
CC: xml-dev@lists.xml.org
In-reply-to: <200210161446.KAA07293@mail2.reutershealth.com> (message from
	John Cowan on Wed, 16 Oct 2002 10:34:00 -0400 (EDT))
Subject: Re: [xml-dev] The XML 1.1 Candidate Recommendation is published
References: <200210161446.KAA07293@mail2.reutershealth.com>
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   From: John Cowan <jcowan@reutershealth.com>


   Elliotte Rusty Harold scripsit:

   > Optional checks worry me. This just adds another point of confusion 
   > like the one in XML 1.0 with non-deterministic content models, where 
   > some parsers accept a document and some reject it. If the check is 
   > optional, it should further be guaranteed to be a non-fatal error, 
   > even when the check is made.

   That is why we say that parsers which do normalization checking must report
   to the application, and emphasize that lack of normalization is not a WF
   error.

But that requirement to report doesn't ensure that the application won't
stop does it? "report" doesn't seem to be specifically defined anywhere.


Also the two phrases

 The option to not verify should be chosen only when the input text is
 certified, as defined by [Charmod]. 


 The option to ignore those denormalizations should not be chosen by
 applications when reliability or security are critical. 

Seem out of place in a normative part of the spec, they are guidelines
aimed at the end user of the application that's using the xml parser.
Such guidelines should not be in the normative prose. As is, what happens
if the user opts not to verify when the input next is _not_ certified?
Is the behaviour undefined? Partly the problem is the (5) uses of the word
"should" which appear to be being used in some colloquial sense rather
than a strict requirement in the sense of the relevant rfc's definition
of SHOULD.

David

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-- 
John Cowan                              jcowan@reutershealth.com
http://www.reutershealth.com            http://www.ccil.org/~cowan
Humpty Dump Dublin squeaks through his norse
                Humpty Dump Dublin hath a horrible vorse
But for all his kinks English / And his irismanx brogues
                Humpty Dump Dublin's grandada of all rogues.
                        --Cousin James
Received on Wednesday, 16 October 2002 18:22:41 GMT

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