Christian,
The data under http://dbpedia.org gets updated about twice a year, when the
entire Wikipedia is re-extracted completely from scratch. However, the data
from http://live.dbpedia.org gets updated virtually instantly.
The data is extracted by the DBpedia Extraction Framework (
http://wiki.dbpedia.org/Documentation). There are several things that get
extracted, usually based on custom extractors (for images for example) or
based on community-generated mappings of Wikipedia infoboxes (
http://mappings.dbpedia.org). So only parts of Wikipedia get extracted. See
for example the extractors in [1]
Revenue is indeed in the infobox company, and it is mapped:
http://mappings.dbpedia.org/index.php?title=Mapping:Infobox_company
I tried this query:
http://dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&query=select+distinct+%3Fcompany+where+{%3Fcompany+%3Chttp%3A%2F%2Fdbpedia.org%2Fontology%2Frevenue%3E+%3Frevenue}+limit+5&format=text%2Fhtml&timeout=0&debug=on
And noticed it's been extracted for 7764 cases [2]. (e.g.
http://dbpedia.org/page/Winstar_Communications)
So it should have been extracted for Apple Inc as well. I noticed that there
is a link alongside the value in the infobox markup, so that may have broken
the extractor. I don't know. You may want to dig into the source code to try
and figure it out. Also, this list of open source volunteers tends to be
quite helpful if asked nicely. So maybe somebody may be able to pick up
where I left.
Cheers,
Pablo
[1]
http://dbpedia.hg.sourceforge.net/hgweb/dbpedia/extraction_framework/file/2774b30ef50a/core/src/main/scala/org/dbpedia/extraction/mappings
[2]
http://mappings.dbpedia.org/server/templatestatistics/en/Infobox_company/
On Tue, Oct 25, 2011 at 3:37 PM, Christian Ehrlich <
[email protected]> wrote:
> Dear DBpedia developers,
>
> I'm currently trying to use some information from DBpedia and got stuck
> with some drawbacks:
>
> - All available Links to logos are invalid. I tried
> http://dbpedia.org/data/Apple_Inc..xml - please check the respective
> content of dbpedia-owl:thumbnail as well as foaf:depiction. After a short
> chat with Sören I also tested live.dbpedia.org - unfortunately with the
> same result :-(
> - Many information from en.wikipedia.org I don't find at all, e. g.
> Revenue or Profit.
>
> Could you please inform how often the content of DBpedia (with and without
> "live.") gets updated and when I should recheck the issues above?
>
> Thx,
> Christian
>
>
> --
> Christian Ehrlich
> Ontos GmbH
>
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