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RE: [Bug 5462] Can sml:nilref="true" be specified on a non-SML reference?

From: Sandy Gao <sandygao@ca.ibm.com>
Date: Fri, 8 Feb 2008 12:54:58 -0500
To: Pratul Dublish <PRATULD@microsoft.com>
Cc: "public-sml@w3.org" <public-sml@w3.org>
Message-ID: <OF5EB8308B.318C3FCB-ON852573E9.0061F6BD-852573E9.00626B9E@ca.ibm.com>
> I don?t see a problem here since the ?MUST ignore? is directed at 
> SML validators and not at XML Schema processors. 

Schema and Schematron processing is part of SML validation.

sml:nilref should only be ignored in the context of "is this *thing* a 
null reference?" It should not be ignored in any other context.

This is also related to 5406. We are talking about data/semantics here 
(what's a null ref), which should not be described as "processors must".

Thanks,
Sandy Gao
XML Technologies, IBM Canada
Editor, W3C XML Schema WG
Member, W3C SML WG
(1-905) 413-3255 T/L 313-3255
 

Pratul Dublish <PRATULD@microsoft.com> wrote on 2008-02-08 10:46:59 AM:

> I don?t see a problem here since the ?MUST ignore? is directed at 
> SML validators and not at XML Schema processors. 
> 
> From: public-sml-request@w3.org [mailto:public-sml-request@w3.org] 
> On Behalf Of Sandy Gao
> Sent: Friday, February 08, 2008 7:26 AM
> To: public-sml@w3.org
> Subject: Re: [Bug 5462] Can sml:nilref="true" be specified on a non-
> SML reference?
> 
> 
> Michael typed in IRC some text related to this topic. It may be 
> worthwhile to take a look there. 
> 
> > Processors MUST ignore an sml:nilref attribute when present on an 
> element that
> > is not an SML Reference [4.1.1 SML Reference], ...
> 
> I would want to avoid "MUST ignore", because it's not ignored in, e.
> g., schema validation, rule checking, etc. Maybe something like "has
> no effect" is more appropriate. ("No effect" should already be a 
> consequence from it's normative definition/semantics, so no need to 
> use "MUST".)
> 
> Thanks,
> Sandy Gao
> XML Technologies, IBM Canada
> Editor, W3C XML Schema WG
> Member, W3C SML WG
> (1-905) 413-3255 T/L 313-3255
> 

> 
> bugzilla@wiggum.w3.org 
> Sent by: public-sml-request@w3.org 
> 2008-02-07 07:03 PM 
> 
> To
> 
> public-sml@w3.org 
> 
> cc
> 
> Subject
> 
> [Bug 5462] Can sml:nilref="true" be specified on a non-SML reference?
> 
> 
> 
> 
> 
> 
> 
> http://www.w3.org/Bugs/Public/show_bug.cgi?id=5462
> 
> 
> virginia.smith@hp.com changed:
> 
>           What    |Removed                     |Added
> 
----------------------------------------------------------------------------
>           Keywords|editorial                   |needsReview
> 
> 
> 
> 
> ------- Comment #2 from virginia.smith@hp.com  2008-02-08 00:03 -------
> Section 4.2.5 now reads (last sentence is new):
> 
> 4.2.5 Null SML References
> 
> An null SML reference is an explicit declaration of intent by the 
document
> author that the SML reference itself does not exist, and a 
> processing directive
> (not a hint) to processors not to attempt to recognize any 
referenceschemes in
> it. If an SML reference is recognized as null, then processors MUST 
> NOT attempt
> to resolve it.
> 
> Processors MUST ignore an sml:nilref attribute when present on an 
element that
> is not an SML Reference [4.1.1 SML Reference], in which case the 
consumer MAY
> issue a warning to its invoker. 
Received on Friday, 8 February 2008 17:55:48 UTC

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