On Sun, 28 Nov 2010 14:52:21 +0100
Giovanni Tummarello <[email protected]> wrote:

> is clearly a web page but its also an actor, it is pointed by their
> graph in other pages as such and the same page contains the opengraph
> triple  "type" "actor"

That's consistent with the definition of the og:type property. og:type
is roughly equivalent to the following property chain in N3:

        foaf:primaryTopic!rdf:type!rdfs:label

So if a page contains:

        <> og:type "actor" .

That's equivalent to:

        <> foaf:primaryTopic [
             a [ rdfs:label "actor" ]
           ] .

This is similar in spirit to foaf:workplaceHomepage which could be
written as a chain of ex:workplace!foaf:homepage.

-- 
Toby A Inkster
<mailto:[email protected]>
<http://tobyinkster.co.uk>

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