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

From: Shane McCarron <shane@aptest.com>
Date: Sun, 27 Feb 2011 17:47:44 -0600
Message-ID: <4D6AE2A0.7060804@aptest.com>
To: Manu Sporny <msporny@digitalbazaar.com>
CC: Toby A Inkster <mail@tobyinkster.co.uk>, Harry Halpin <hhalpin@w3.org>, RDFa WG <public-rdfa-wg@w3.org>

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 Sunday, 27 February 2011 23:48:42 UTC

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