Hello, mo wrote: > Hello all, > [...] > > * We can easily get >15000 projects from freebase [1], even along with > Wikipedia keys, but which of the multiple keys are the ones used in > dbpedia? Is there any fixed rule/heuristics which to use?
What exactly do you mean by "key"? DBpedia URIs correspond to Wikipedia articles, i.e. http://dbpedia.org/resource/$something contains information about the object described at http://en.wikipedia.org/wiki/$something. We took care not to change the Wikpedia article URIs. I don't know how Freebase handles it. There was some discussion that the Freebase guys want to publish their data as Linked Data and interlink it with DBpedia, but as far as I know that has not happened yet. Freebase does have dumps, which (they claim) can be easily converted to RDF. That might be a starting point. > * The dbpedia data on buildings seems richer - but I can't find out > how to retrieve ALL architectural projects in dbpedia. I tried [2] > athttp://dbpedia.org/sparql > , but it stops athttp://dbpedia.org/resource/Beijing_Zoo There is a limit of 1000 results on the SPARQL endpoint. So either you have to use limit and offset or you just download the complete YAGO file and grep for http://dbpedia.org/class/yago/Building102913152. The data set is called "YAGO classes" and can be downloaded from the DBpedia download page [1]. > * Also, I find it hard to find out which properties buildings > typically have in dbpedia. How do you do that? Just inspect lots of > instances? Any tricks there? Basically yes. They are available as Linked Data, e.g. you can just call http://dbpedia.org/resource/Beijing_Zoo in your browser. The available topics are determined by Wikipedia and in particular the infoboxes. The Beijing_Zoo page [2] does not have an infobox, so you won't get much building specific information there. You could watch out for common Wikipedia infoboxes related to buildings (if those exist) to find typical properties. Kind regards, Jens [1] http://wiki.dbpedia.org/Downloads [2] http://en.wikipedia.org/wiki/Beijing_Zoo -- Dipl. Inf. Jens Lehmann Department of Computer Science, University of Leipzig Homepage: http://www.jens-lehmann.org GPG Key: http://jens-lehmann.org/jens_lehmann.asc ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Dbpedia-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
