W3C home > Mailing lists > Public > www-rdf-interest@w3.org > April 2001

Re: RDF in XHTML

From: Sean B. Palmer <sean@mysterylights.com>
Date: Wed, 18 Apr 2001 14:56:43 +0100
Message-ID: <018b01c0c80f$885dfee0$7cdc93c3@z5n9x1>
To: "Murray Altheim" <altheim@eng.sun.com>
Cc: "RDF Interest" <www-rdf-interest@w3.org>
Murray Altheim <mailto:altheim@eng.sun.com> wrote:-

> We still need to provide the application with the notation
> processor, which doesn't happen via this mechanism.

Ah, I see. I guess that FPIs are just a fallback from the old
cataloguing days... which I guess can be modelled in RDF (in fact,
using Notation3):-

   <http://www.w3.org/DesignIssues/Notation3> a :SGMLNotation;
   :hasFPI "-//W3C//NOTATION Notation3//EN" .
   :hasFPI a daml:unambiguousProperty; rdfs:range :FPI .
   :SGMLNotation :monikerFor :Datatype .

> This makes the application designer's task merely of assigning
> processors to well known notations, watching across the API
> for nodes or entities having those notations, and then sending
> the content on to the notation/datatype processor.

Hmm... I'm still a little uncomfortable with getting parsers to vance
upon the DTD just to gain a notation. I'd be a bit more comfortable if
one declared it in the head of the doucment like so:-

   <!DOCTYPE html SYSTEM "xhtml11.dtd" [
      <!NOTATION n3 SYSTEM "http://www.w3.org/DesignIssues/Notation3">
      <!ENTITY % Metadata.ext "| n3" >
   ]>
   <html xmlns="http://www.w3.org/1999/xhtml"
         xml:lang="en" >
   [...]

But then it'd still require vancing upon the DTD to gain information
about the %Metadata.ext entity.

Is it possible to declare that a certain attribute's content acts as
an SGML notation system identifier? Still, without some kind of
DTD/schema, you wouldn't even be able to know that the content of
"notation" is meant to refer to a notation/datatype, so there'd be no
point really. Grr... all data is proprietary in a sense; it's
difficult achieving the correct balance.

--
Kindest Regards,
Sean B. Palmer
@prefix : <http://webns.net/roughterms/> .
:Sean :hasHomepage <http://purl.org/net/sbp/> .
Received on Wednesday, 18 April 2001 09:57:27 GMT

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