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RE: xml literal lex space question

From: Jeremy Carroll <jjc@hplb.hpl.hp.com>
Date: Fri, 8 Aug 2003 15:38:53 +0200
To: "Graham Klyne" <gk@ninebynine.org>, "Brian McBride" <bwm@hplb.hpl.hp.com>, <w3c-rdfcore-wg@w3.org>
Cc: "Peter F. Patel-Schneider" <pfps@research.bell-labs.com>
Message-ID: <BHEGLCKMOHGLGNOKPGHDAEOHCBAA.jjc@hpl.hp.com>



I note that this lexical space thread will need restarting once we have
decided the value space :(

Jeremy



> -----Original Message-----
> From: w3c-rdfcore-wg-request@w3.org
> [mailto:w3c-rdfcore-wg-request@w3.org]On Behalf Of Graham Klyne
> Sent: 31 July 2003 20:18
> To: Brian McBride; w3c-rdfcore-wg@w3.org
> Cc: Peter F. Patel-Schneider
> Subject: Re: xml literal lex space question
>
>
>
> [This message rambles a bit... for my final suggestion, skip to ****]
>
> I agree, and suggest:
>
> [[
> The lexical space
>      is the set of all Unicode strings which:
>
>          * are well-balanced, self-contained XML data [XML];
>          * when encoded using UTF-8 yield exclusive Canonical XML
>            (with comments, with empty InclusiveNamespaces PrefixList )
>            [XML-XC14N];
> ]]
>
> It occurs to me that the source of confusion may be:
> [[
> The lexical-to-value mapping
>      maps a string to the corresponding exclusive Canonical XML (with
> comments, with empty InclusiveNamespaces PrefixList ).
> ]]
> --
> http://www.w3.org/2001/sw/RDFCore/TR/WD-rdf-concepts-20030117/#sec
> tion-XMLLiteral
>
> when, now that the canonicalization is handled by the parser, all
> we really
> need to say is:
> [[
> The lexical-to-value mapping
>      is UTF-8 encoding of the lexical form (yielding an octet sequence)
> ]]
>
> It which case, the lexical space description might be:
> [[
> The lexical space
>      is the set of all Unicode strings which are mapped by the
>      lexical-to-value mapping to exclusive canonical XML
>      (with comments, with empty InclusiveNamespaces PrefixList )
>      [XML-XC14N];
> ]]
>
> But hang on, we already have:
> [[
> The value space
>      is the set of all exclusive Canonical XML (with comments, with empty
> InclusiveNamespaces PrefixList ), which when embedded within an arbitrary
> XML start tag and an end tag form a document conforming to XML Namespaces
> [XML-NS].
> ]]
>
> So even that is redundant.  Maybe:
>
> [[
> The lexical space
>      is the set of Unicode strings which are mapped by
>      UTF-8 encoding to valid XMNL literal values (see below)
> ]]
>
> ****
>
> Putting it all together, and polishing a little, my suggestion is:
>
> [[
> The lexical space
>      is the set of Unicode strings which are mapped by
>      UTF-8 encoding to valid XML literal values (see below)
>
> The lexical-to-value mapping
>      is UTF-8 encoding (yielding an octet sequence, where octets are
>      distinct from characters)
>
> The value space
>      is the set of all exclusive Canonical XML (with comments,
>      with empty InclusiveNamespaces PrefixList ), which when embedded
>      within an arbitrary XML start tag and an end tag form a document
>      conforming to XML Namespaces [XML-NS].
> ]]
>
> #g
> --
>
> At 16:11 31/07/03 +0100, Brian McBride wrote:
>
> >A question has come up on comments.  Is "<ex/>" in the lexical space
> >rdf:XMLLiteral.  I believe not, it must be "<ex></ex>", but
> wanted to check.
> >
> >The text in concepts is:
> >
> >http://www.w3.org/2001/sw/RDFCore/TR/WD-rdf-concepts-20030117/#se
> ction-XMLLiteral
> >
> >[[
> >The lexical space
> >     is the set of all strings which:
> >
> >         * are well-balanced, self-contained XML data [XML];
> >         * correspond to exclusive Canonical XML (with comments, with
> > empty InclusiveNamespaces PrefixList ) [XML-XC14N];
> >]]
> >
> >The corresponds to will need clarification.
> >
> >Brian
>
> ---------------------------------
> Graham Klyne  <GK@NineByNine.net>
> Nine by Nine
> http://www.ninebynine.net/
>
>
Received on Friday, 8 August 2003 09:44:06 EDT

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