Re: RDFa in HTML5

On 1/2/12 6:43 AM, Augusto Herrmann wrote:
> Hi!
>
> We've recently added some examples on how to mark up web pages using
> our controlled vocabulary for e-gov (Vocabulário Controlado de Governo
> Eletrônico - VCGE). The examples include HTML5 + RDFa 1.1, HTML5 +
> RDFa Lite 1.1 and HTML5 + Microdata, and we'd like to check if it's
> correct.
>
> For instance, if a webpage is about Education, it would be marked up like this:
>
> <!DOCTYPE html>
> <html>
> <head>
>    <title>Página sobre Educação</title>
>    <meta property="http://purl.org/dc/terms/subject"
> content="http://vocab.e.gov.br/2011/03/vcge#educacao" />
>    ...
> </head>
>    ...
> </html>
>
> Since there's no "about" attribute to set the subject in this example,
> it is assumed to be the current document. Thus, the following triple
> would be generated:
>
> <>  dcterms:subject<http://vocab.e.gov.br/2011/03/vcge#educacao>  .
>
> In RDFa Lite, we followed the example set in its current draft
> document by using schema.org:
>
> <!DOCTYPE html>
> <html>
> <head>
>    <title>Página sobre Educação</title>
>    <meta vocab="http://schema.org/" property="about"
> content="http://vocab.e.gov.br/2011/03/vcge#educacao" />
>    ...
> </head>
>    ...
> </html>
>
> I think this would generate the following triple:
>
> <>  <http://schema.org/about>  <http://vocab.e.gov.br/2011/03/vcge#educacao>  ..
>
> Finally, using Microdata, we can't just assume the current document is
> the subject like in RDFa, and the itemscope has to be set explicitly;
> The empty itemid would indicate the current document:
>
> <!DOCTYPE html>
> <html>
> <head itemscope itemtype="http://schema.org/WebPage" itemid="">
>    <title>Página sobre Educação</title>
>    <meta itemscope itemprop="about"
> content="http://vocab.e.gov.br/2011/03/vcge#educacao" />
>    ...
> </head>
>    ...
> </html>
>
> I checked the URL with Google Rich Snippets and it did indeed find the
> Microdata item like this (the page is marked up using both RDFa 1.1
> and Microdata):
>
> Item
> http://schema.org/about = http://vocab.e.gov.br/2011/03/vcge#esquema
>
> You can check how our controlled vocabulary is presented as well as
> the examples in the following URL: http://vocab.e.gov.br/2011/03/vcge
>
> Comments, suggestions, and especially corrections are welcome.
>
> Best regards,
> Augusto Herrmann
> Open Data Team
> Ministry of Planning, Budget&  Management - Brazil
>
> On Sun, Dec 25, 2011 at 1:32 PM, Gregg Kellogg<gregg@kellogg-assoc.com>  wrote:
>> On Wed, Nov 30, 2011 at 1:15 AM, Jeremy Tarling<jeremy.tarling@bbc.co.uk>
>> wrote:
>>> hi, I'm working with the BBC weather web team and we'd like to add some
>>> minimal RDFa to link forecast pages with their associated GeoID
>>>
>>> back in August Keith Alexander on this list suggested something like:
>>>
>>> <link rev="meteo:forecastPage" href="http://sws.geonames.org/2637142/">
>>> could be added to http://www.bbc.co.uk/weather/2637142
>>>
>>> we were about to implement this but have hit a snag, we're using HTML5 and
>>> I understand rev has been deprecated.
>>>
>>> has anyone come across a similar problem, or have a suggestion for an
>>> alternative way of making this association?
>>>
>> @rev has not been deprecated, it's just not in the RDFa Lite profile. All
>> conforming RDFa parsers will understand @rev and your example is just fine.
>>
>> Alternatively, you could reverse and use@about and duplicate the web page
>> address in @href ursine either @property or @ref instead of @rev, but this
>> is the case that @rev was created to address.
>>
>> Gregg
>>
>
>

Happy New Year to everyone!

Could you provide URLs to each of the HTML5 resource types? That makes 
verification and bug identification much easier.

-- 

Regards,

Kingsley Idehen	
Founder&  CEO
OpenLink Software
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Received on Monday, 2 January 2012 19:57:57 UTC