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Re: Dropping RDF mapping from microdata spec

From: Gregg Kellogg <gregg@kellogg-assoc.com>
Date: Wed, 27 Jul 2011 16:04:39 -0400
To: Jeni Tennison <jeni@jenitennison.com>
CC: Michael Hausenblas <michael.hausenblas@deri.org>, "www-tag@w3.org List" <www-tag@w3.org>
Message-ID: <54E21555-D0EF-41E5-B378-0640A4E5C24B@kellogg-assoc.com>
In a G+ post [1], I described the option to my Microdata parser for generating property URIs from tokens:

The :rdf_terms option changes the processing algorithm for generating URIs from @itemprop values that are not already an absolute URI. Using the in-scope type (from @itemtype, or fallback_type), replace everything following the last '/' or '#' with the term. This results in more familiar URIs, and works so long as normal RDF vocabularies are used for minting types.

For example, consider the case where @itemtype is "http://schema.org/Person" and @itemprop is "name". Using the standard scheme, the generated property URI would be <http://www.w3.org/1999/xhtml/microdata#http://schema.org/Person%23:name>. Using the :rdf_terms option, it will generate the following URI: <http://schema.org/name>.

I think this is much more useful for people in general. There may be some corner-cases where this doesn't work, and I'd be interested in comments from the community.

Gregg

[1] https://plus.google.com/115239936584020095918/posts

On Jul 27, 2011, at 9:58 AM, Jeni Tennison wrote:

Hi Michael :)

On 27 Jul 2011, at 17:29, Michael Hausenblas wrote:
I know that Michael Hausenblas and others have been working on doing a mapping from schema.org<http://schema.org> to RDF; perhaps that might work as the basis for a Community Group that could look at defining a mapping.

The Schema.org<http://Schema.org> sponsors have taken up this work and directly provide an OWL version now [1]. We collect and maintain mappings from widely deployed RDF vocabularies to Schema.org<http://Schema.org> via Schema.RDFS.org<http://Schema.RDFS.org> [2] ... which reminds me that I have an action to properly update our site with the recent changes ;)

I had a recollection that you were also creating RDF versions of pages that contained schema.org<http://schema.org> microdata. Is that right?

I know that the RDF versions of the schema.org<http://schema.org> properties have nice simple URIs like http://schema.org/affiliation which wouldn't naturally arise from microdata's RDF mapping.

My question is, if I have recalled correctly that you are dynamically creating RDF from pages marked up with schema.org<http://schema.org> microdata, is the mapping that you use generic (e.g. map any short-name property into a URI based on the itemtype of the nearest item) or specific to schema.org<http://schema.org> (i.e. recognise those particular short-name properties on items with a schema.org<http://schema.org> type)?

Thanks,

Jeni
--
Jeni Tennison
http://www.jenitennison.com
Received on Wednesday, 27 July 2011 20:05:58 GMT

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