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Re: [closed] Re: buglet in syntax / test cases

From: Peter F. Patel-Schneider <pfps@research.bell-labs.com>
Date: Wed, 04 Jun 2003 08:04:33 -0400 (EDT)
Message-Id: <20030604.080433.120260979.pfps@research.bell-labs.com>
To: dave.beckett@bristol.ac.uk
Cc: www-rdf-comments@w3.org

From: Dave Beckett <dave.beckett@bristol.ac.uk>
Subject: [closed] Re: buglet in syntax / test cases
Date: Wed, 4 Jun 2003 12:37:39 +0100

> On Thu, 22 May 2003 10:22:00 -0400
> "Peter F. Patel-Schneider" <pfps@research.bell-labs.com> wrote:
> > 
> > I'm having trouble understanding  the following wording from 6.1.2 in 
> > RDF/XML Syntax
> > 
> > All other attributes beginning with |xml| are then removed (that is, all 
> > attributes with ·namespace-name· 
> > <http://www.w3.org/TR/rdf-syntax-grammar/#eventterm-attribute-namespace-name> 
> > accessors values     beginning with 
> > "http://www.w3.org/XML/1998/namespace"). Note: the base URI is computed 
> > before any |xml:base| attribute is deleted.
> > 
> > Does this mean that an attribute named `xmlnewthing' should be removed, 
> > as tested in
> > http://www.w3.org/2000/10/rdf-tests/rdfcore/unrecognised-xml-attributes/test002.rdf
> > or does it mean that an attribute that might be commonly written as 
> > `xml:newthing' should be removed?
> Both "xmlnewthing" and "xml:newthing" should be removed.
> It is trying to say, having got the XML infoset element infoitem,
> first grab any xml:lang attribute value for the language accessor.
> XML Base and XML Namespaces processing is already provided by the XML
> Infoset, so there is nothing further to do with those attributes
> (xml:base, xmlns*). 

I do not believe that this is correct.  XML namespace processing does
remove attributes that define XML namespaces.  However, I do not believe
that XML Base permits the removal of xml:base attributes.  

> Finally remove all the attributes that start with the three
> characters 'x' 'm' and 'l'.
> I agree that the wording there could be improved so I will reword
> this section to try to explain the existing method more clearly,
> probably based on this message.
> Thanks
> Dave

It looks to me as if all names starting xml (in any combination of
uppercase and lowercase letters) are reserved in XML, both as attribute
names and as element names.  I believe that there is a disconnect between
XML and RDF/XML in the treatment of reserved names, and that a careful
review of this serious issue be made.

Peter F. Patel-Schneider
Bell Labs Research
Lucent Technologies
Received on Wednesday, 4 June 2003 08:04:48 UTC

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