Thanks, Jens. Mike
Jens Lehmann wrote: > Hello, > > Michael K. Bergman schrieb: >> Hi Richard, >> >> Richard Cyganiak wrote: >> >>> Interesting project. Just a word of caution: Note that DBpedia isn't >>> an ontology. From an ontology point of view, DBpedia is just a bunch >>> of instances, without a nice well-engineered class hierarchy. Two >>> different experimental class hierarchies are available for DBpedia >>> (YAGO and CWCC), but both have their flaws, are very complex, and I >>> wouldn't say that they represent the "natural order of things" -- >>> maybe rather the "natural disorder of things" ;-) >> I see from the downloads page that CWCC is the Cleaned >> (misspelled) Wikipedia Category Class hierarchy, but that is a >> new one for me. I googled and was not able to find more. >> >> Could you some background and links on CWCC? > > Copied from the download page: "The aim of this class hierarchy is to be > close to the Wikipedia category system, but without some of its > obstacles, e.g. cycles of categories, administrative categories, > categories which represent instances instead of classes etc. However, > the current extraction script contains some bugs and data cleansing > still insufficient to be useful in applications. For this reason, the > data set is not published in the SPARQL endpoint." > > We started an effort to clean and modify the Wikipedia categories > towards a usable class hierarchy, such that we have something which is > close to the Wikipedia categories but without some of its obstacles. > However, due to lack of time the current data set doesn't have a good > quality, so I cannot really recommend its usage except for experiments > or as a starting point for improving it. > > Jens ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Dbpedia-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
