W3C home > Mailing lists > Public > public-vocabs@w3.org > July 2013

Re: Offer data in separate places in HTML

From: Francois-Paul Servant <francoispaulservant@gmail.com>
Date: Tue, 30 Jul 2013 13:02:08 +0200
Message-Id: <7C2E52C4-DFA7-4D5D-95B9-FE503C7C2293@gmail.com>
To: public-vocabs@w3.org
Hi,

> On May 14, 2013, at 4:53 PM, Robert Kost wrote:
>> Is there an equivalent method for doing itemref in RDFa?

> To my knowledge, unfortunately not. You can, in theory, collate statements scattered across an HTML document by using the about property with the same identifier in the enclosing (outer) RDFa entity,
in theory, and in practice: you can check it with the RDFa extractor on the w3 site.

> but
> 1. that is kind of clumsy

why? I find it very natural. That's why URIs are useful: to identify things and to be able to make statement about those things, wherever you want! 

> 2. search engines will often not understand that the information belongs to the same entity, since they typically parse RDFa markup as a tree and not as a graph (i.e. nesting matters).

what you say here is that search engines do not parse RDfa as RDFa.

> In my opinion, itemref is a really strong feature of Microdata.

Hmm, according to your point 2, I'd say that it is the support of RDFa by search engines which is weak.

Best,

fps
Received on Tuesday, 30 July 2013 11:02:41 UTC

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