[foaf-dev] foaf:page / foaf:primaryTopic in DBpedia

Jona Christopher Sahnwaldt jc at sahnwaldt.de
Mon May 21 14:56:33 EDT 2012


Hi,

DBpedia will use foaf:primaryTopic and foaf:isPrimaryTopicOf in 3.8
(not foaf:primaryTopic and foaf:page as before). Seemed the most
sensible combination to me, but I'm not a FOAF expert.

Please let me know soon if you think that's a bad idea.

Cheers,
JC

On Tue, May 15, 2012 at 8:47 PM, Jona Christopher Sahnwaldt
<jc at sahnwaldt.de> wrote:
> Hi,
>
> I think there's a slight inconsistency in some FOAF triples published
> by DBpedia.
>
> For example, see these triples from
> http://downloads.dbpedia.org/preview.php?file=3.7_sl_en_sl_wikipedia_links_en.nq.bz2
> :
>
> <http://en.wikipedia.org/wiki/Anarchism>
> <http://xmlns.com/foaf/0.1/primaryTopic>
> <http://dbpedia.org/resource/Anarchism> .
> <http://dbpedia.org/resource/Anarchism>
> <http://xmlns.com/foaf/0.1/page>
> <http://en.wikipedia.org/wiki/Anarchism> .
>
> DBpedia basically uses foaf:primaryTopic and foaf:page as inverse
> properties, but the foaf spec says:
>
> foaf:page -> http://xmlns.com/foaf/spec/#term_page
> The page property relates a thing to a document about that thing.
> As such it is an inverse of the topic property, which relates a
> document to a thing that the document is about.
>
> foaf:primaryTopic -> http://xmlns.com/foaf/spec/#term_primaryTopic
> The primaryTopic property relates a document to the main thing that
> the document is about.
> It is an inverse of the isPrimaryTopicOf property, which relates a
> thing to a document primarily about that thing.
>
> I think DBpedia should use either
>
> - foaf:primaryTopic and foaf:isPrimaryTopicOf
>
> or
>
> - foaf:page and foaf:topic
>
>
> What do you think?
>
> Cheers,
> Christopher


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