[uf-new] Microformats for hidden data

Thu Nov 26 09:50:55 PST 2009

On 26/11/2009 17:33, "Fiann O'Hagan" <fianno at jshub.org> wrote:

Hi Fiann

> Hi Toby
> 
>> Have you considered using RDFa? This is a set of XHTML attributes which
>> brings the RDF data model to XHTML. (Many parsers also support "tag
>> soup" HTML too.)
> 
> My understanding of RDFa is that it's not possible to include in valid
> XHTML 1.0 

If you want to serve rdfa you'll need to use an rdfa doctype:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN"
        "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">

It's the only change you need to make and is fully supported by w3c
validators

> and that in any case there are problems with serving pages
> with an XML mimetype rather than text/html.

There are all kinds of problems serving pages as xml but it's not required
for rdfa - just keep serving as text/html
> 
> Do you have any real-world examples of RDFa being published?

The canonical example is the london gazette:
http://www.london-gazette.co.uk/

We're also using a very small dash of rdfa on bbc.co.uk:
http://www.bbc.co.uk/music/reviews/66gb

...with plans to add much more to bbc.co.uk/programmes in the near future

> I can see
> you have created a parser, but I am not aware of many examples outside
> of the W3 site.
> 
> I'm interested in RDFa but I do find the arguments in Tantek's mail
> from this list quite compelling
> http://microformats.org/discuss/mail/microformats-discuss/2006-May/004144.html
> 
> I'd be interested to know if anything has changed in the last 3 years.
> 
> Fiann
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> microformats-new at microformats.org
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