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Re: Last Call Response to ISSUE-73: RDFa Profile management

From: Ivan Herman <ivan@w3.org>
Date: Mon, 28 Feb 2011 07:02:32 +0100
Message-Id: <353F78C0-AFDA-4C29-B908-B2878C7D3E22@w3.org>
Cc: Manu Sporny <msporny@digitalbazaar.com>, Toby A Inkster <mail@tobyinkster.co.uk>, Harry Halpin <hhalpin@w3.org>, RDFa WG <public-rdfa-wg@w3.org>
To: Shane McCarron <shane@aptest.com>

I may not understand what you say. But if I do, this is not a minor issue. Indeed, the question is whether the core default profile is a subset of the xhtml default profile or not. Put it another way, whether all the prefixes and terms defined in the core profile should be repeated in the xhtml profile, too. Manu's approach means that it is unnecessary to do so, in your case it is. I happen to be on Manu's side on this although, as we say, I would not lie down the road...


Ivan Herman
Tel:+31 641044153

On 28 Feb 2011, at 00:47, Shane McCarron <shane@aptest.com> wrote:

> Manu,
> A minor comment:
> On 2/20/2011 1:23 PM, Manu Sporny wrote:
>> ...
>> Profile Document Selection Algorithm
>> ------------------------------------
>> The RDFa WG discussed several algorithms for determining the correct
>> profile to use. In the end, the simplest and most reliable mechanism
>> seemed to be to do the following:
>> 1. Always load the RDFa Core 1.1 default profile first.
>> 2. If an "application/xhtml+xml" or "text/html" MIMEType is detected,
>>    load the HTML+RDFa 1.1 default profile.
>> Step #1 will be placed into the RDFa Core 1.1 specification. Step #2
>> will be placed into the (X)HTML Host Language specifications.
> I actually DISAGREE with this.  I think it is more sensible to have the processor determine the media type, then act accordingly.  In fact, we had already introduced text that supports that model [1]:
>> A conforming RDFa Processor must examine the media type of a document it is processing to determine the document's Host Language. If the RDFa Processor is unable to determine the media type, or does not support the media type, the RDFa Processor must process the document as if it were media type application/xml. See XML+RDFa Document Conformance.
> I say this is a minor comment because I believe the effect on document processing is identical - it really just means that an implementation is not required to read / process TWO default profiles in what is likely to be the most common case.  After all, I think we all expect that HTML4 / HTML5 documents are the most prevalent on the network.
> -- 
> Shane P. McCarron                          Phone: +1 763 786-8160 x120
> Managing Director                            Fax: +1 763 786-8180
> ApTest Minnesota                            Inet: shane@aptest.com

Received on Monday, 28 February 2011 06:03:15 UTC

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