Nguyen Thanh Tu wrote: > Thank you for your reply. Now I use lookup WS to query in DBpedia. And > I got two problems when I tried to get all resources about Apple: > > 1. I use the URL: > http://lookup.dbpedia.org/query.aspx?q=Apple > > And the results are about Apple Inc, Apple Records, Newton, apple > pie,.., but not about Apple (fruit or tree). > > When I search in web-based (http://lookup.dbpedia.org), I get the full > answers. > > Do you think I should fix something here? > > 2. I don't know why I cannot use another URL: > http://lookup.dbpedia.org/api/search.asmx/KeywordSearch?QueryString=Apple
Are you trying to perform what I call a disambiguated lookup for an entity associate with the pattern: Apple? I ask based on: 1. http://lookup.dbpedia.org/query.aspx?q=Apple 2. http://lookup.dbpedia.org/api/search.asmx/KeywordSearch?QueryString=Apple If so, do the following: 1. Go to: http://dbpedia.org/fct 2. Enter pattern: Apple 3. Use the Navigator Section to Pivot by Entity Type 4. If need be, Pivot by Properties associated with the Entity Type filtered set from above 5. Click on "show results" or "show results with count" 6. Click through to description of the entity you seek. If you like the above, then go to http://dbpedia.org/fct and follow the About link to the Web Services page, you can do the same thing via a RESTful service. Kingsley > > Cheers, > Thanh-Tu > > On Thu, Dec 17, 2009 at 3:44 PM, Richard Cyganiak <[email protected] > <mailto:[email protected]>> wrote: > > > On 17 Dec 2009, at 12:25, Nguyen Thanh Tu wrote: > > I'm wondering whether the disambiguation resource (e.g. > > Apple_%28disambiguation%29<http://dbpedia.org/resource/Apple_%28disambiguation%29>) > > > has all the disambiguation links or not. Because I've tried 2 > disambiguation > resources "Apple" and "Amphibian", and I see the results are > uncompleted > (explained below). > > http://dbpedia.org/resource/Apple_%28disambiguation%29 > > http://dbpedia.org/resource/Amphibian_%28disambiguation%29<http://dbpedia.org/resource/Apple_%28disambiguation%29> > > > > With the first link, the results include the disambiguation link " > > http://dbpedia.org/resource/apple<http://dbpedia.org/resource/Apple_%28disambiguation%29>", > (not > > "http://dbpedia.org/resource/Apple<http://dbpedia.org/resource/Apple_%28disambiguation%29>"), > > > therefore, I couldn't go from > > Apple_%28disambiguation%29<http://dbpedia.org/resource/Apple_%28disambiguation%29> > to > > http://dbpedia.org/resource/Apple<http://dbpedia.org/resource/Apple_%28disambiguation%29> > . > > > The link in Wikipedia is [[apple]], so DBpedia extracts a > lowercase link. In Wikipedia, the first letter of page names is > case-insensitive. In DBpedia, the entire URI is case-sensitive > (that's prescribed by RDF). So the lower-case link works in > Wikipedia but not in DBpedia. > > I wonder wether it would make sense to normalize the first > character in page names to upper-case in DBpedia. > > With the second link, the results don't include the link > > http://dbpedia.org/resource/<http://dbpedia.org/resource/Apple_%28disambiguation%29> > Amphibian > <http://dbpedia.org/resource/Apple_%28disambiguation%29>, and > > include the link to "Amphibious_vehicle" which doesn't go to > anywhere else > (in fact, it should). > > > The algorithm for extracting disambiguation links is fairly naïve, > it extracts only links that include the original page name (in > this case, "Amphibian"). So it would extract "Amphibian (song)", > "Amphibian aircraft", but not "Amphibious vehicle". That's a > limitation of the algorithm -- to always do the right thing, it > would have to analyse the layout and semantics of the wiki text, > which is a bit beyond the DBpedia project's means. I'm sure that > the DBpedia team would accept patches that improve the algorithm > though -- all the code is open! > > (Currently, "Amphibian aircraft" is not in the extracted RDF data > either. That's because of a bug which has been fixed after the > last extraction.) > > Best, > Richard > > > > > Do you know what I should do to get all the information of > disambiguation > for one word? > Thank you, > Cheers, > Thanh-Tu > > ------------------------------------------------------------------------------ > This SF.Net email is sponsored by the Verizon Developer Community > Take advantage of Verizon's best-in-class app development support > A streamlined, 14 day to market process makes app distribution > fast and easy > Join now and get one step closer to millions of Verizon customers > http://p.sf.net/sfu/verizon-dev2dev > _______________________________________________ > Dbpedia-discussion mailing list > [email protected] > <mailto:[email protected]> > https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion > > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------------ > This SF.Net email is sponsored by the Verizon Developer Community > Take advantage of Verizon's best-in-class app development support > A streamlined, 14 day to market process makes app distribution fast and easy > Join now and get one step closer to millions of Verizon customers > http://p.sf.net/sfu/verizon-dev2dev > ------------------------------------------------------------------------ > > _______________________________________________ > Dbpedia-discussion mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion > -- Regards, Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen President & CEO OpenLink Software Web: http://www.openlinksw.com ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ Dbpedia-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/dbpedia-discussion
