W3C home > Mailing lists > Public > public-rdf-in-xhtml-tf@w3.org > July 2009

Re: Publishing a new draft (HTML5+RDFa)

From: Ian Hickson <ian@hixie.ch>
Date: Fri, 31 Jul 2009 04:45:53 +0000 (UTC)
To: Sam Ruby <rubys@intertwingly.net>
Cc: Maciej Stachowiak <mjs@apple.com>, Leif Halvard Silli <lhs@malform.no>, Ben Adida <ben@adida.net>, Manu Sporny <msporny@digitalbazaar.com>, HTML WG <public-html@w3.org>, RDFa mailing list <public-rdf-in-xhtml-tf@w3.org>
Message-ID: <Pine.LNX.4.62.0907310436200.28566@hixie.dreamhostps.com>
On Thu, 30 Jul 2009, Sam Ruby wrote:
> Maciej Stachowiak wrote:
> > 
> > It seems that some WG participants are uncomfortable with a perception 
> > of forks or branches, and I've suggested a way to proceed that would 
> > appear less forky.
> 
> My observation is simply this: such a proposal would be more credible if 
> it were applied equally to micro-data and RDFa.

The reason microdata is in HTML5 and RDFa is not is that RDFa has 
fundamental technical problems that make it unsuitable for use in 
text/html in general, and unsuitable as a solution for the user cases for 
which RDFa and microdata have been proposed as solutions in particular.

For example, the use of prefixes, the exclusive use of URIs for 
identifiers, the use of rev="", the use of rel="" in a manner incompatible 
with the rest of HTML, the overly complicated processing model, the 
presence of features that aren't necessary (such as per-value data 
typing), and the ability to include multiple name-value pairs per element.

I seriously considered using RDFa instead of creating a new technology 
when addressing the use cases that were put forward -- indeed I would much 
rather have used RDFa if I could have, since I don't particularly care 
about these use cases in the first place and the least I can do to 
address them the better. Unfortunately, I did not find RDFa suitable given 
the use cases and requirements with which I was faced.

However, I have no objection to people forking HTML5 to include RDFa or 
creating a separate specification to define RDFa. To enable the former, 
the WHATWG spec is under a very flexible license (I am still hoping the 
W3C will one day see fit to allow W3C specs to use such a license), and to 
enable the latter, I have explicitly made HTML5 allow other specifications 
to extend the language.

-- 
Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'
Received on Friday, 31 July 2009 04:46:36 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Friday, 31 July 2009 04:46:39 GMT