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Re: Are many (X)HTML documents also RDF/XML documents?

From: Wouter Beek <wouter@triply.cc>
Date: Tue, 7 May 2019 00:50:35 +0200
Message-ID: <CAEh2WcMps6hEZZo-ONoui98W4Zj0HXQL2_YxU4huz=B=inV7Ug@mail.gmail.com>
To: Thomas Passin <tpassin@tompassin.net>
Cc: SW-forum Web <semantic-web@w3.org>
Dear Thomas,

Are RDF/XML documents _required_ to have the RDF namespace defined in
them?  I was expecting a strict requirement like that myself, but
could not find it when looking into the standards.

Such a requirement would indeed result in most HTML documents not
qualifying to also be RDF documents, but so far I have not yet found
this requirement made explicit in the standard.

---
Best,
Wouter.

Email: wouter@triply.cc
WWW: https://triply.cc
Tel: +31647674624

On Tue, May 7, 2019 at 12:00 AM Thomas Passin <tpassin@tompassin.net> wrote:
>
> On 5/6/2019 3:21 PM, Antoine Zimmermann wrote:
> > Interesting remark. I'm not sure what the phrases you quote imply in
> > general, but if you give the following input to the RDF validator at
> > https://www.w3.org/RDF/Validator/, you get an error.
>
> Well, sure, none of the rdf namespaces have been declared anywhere in
> the document, so even if you could otherwise do what is suggested here,
> you need the namespaces.
>
> TomP
>
> > The grammar of rdf:XML is given at
> > https://www.w3.org/TR/rdf-syntax-grammar/#section-Infoset-Grammar
> >
> > I don't think that many HTML documents qualify as RDF/XML, if any.
> >
> > On 06/05/2019 21:55, Wouter Beek wrote:
> >> <?xml version="1.0" encoding="utf-8"?>
> >> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
> >> "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
> >> <html xmlns="http://www.w3.org/1999/xhtml">
> >> <head>
> >>    <title>
> >>    </title>
> >> </head>
> >> <body>
> >>    <table>
> >>      <tr>
> >>        <td>some col 1</td>
> >>      </tr>
> >>    </table>
> >> </body>
> >> </html>
> >
> >
>
>
Received on Monday, 6 May 2019 22:51:34 UTC

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