On 6/12/13 11:24 AM, Sam Esgate wrote:
Hi all,I'm new to DBPedia and am working on a project that needs statistics about countries. DBPedia seems to be the perfect resource for this data as it's all there - I just seem to be having trouble getting at it! This query worked the other day but out of the blue has stopped working and I don't know why! The query gets all of the properties for a specific country all the associated values. Some of these properties are URIs and instead of returning these I just wanted a string of text associated with that URI. With this in mind the query is split into two parts, the first which finds all of the URIs and finds the label associated with it. The second part gets all of the properties that aren't URIs. I then union the two to retrieve everything I want. SELECT ?title ?value WHERE { { ?country ?prop ?uri. ?country a<http://dbpedia.org/ontology/Country>. ?country rdfs:label ?label. ?prop rdf:type rdf:Property. ?prop rdfs:label ?title. ?uri rdfs:label ?value. FILTER (lang(?value) = "en") } UNION { ?country ?prop ?value. ?country a<http://dbpedia.org/ontology/Country>. ?country rdfs:label ?label. ?prop rdf:type rdf:Property. ?prop rdfs:label ?title. } FILTER (?label = "United States"@en && !isURI(?value)) } Individually these work but the union, which worked a couple of days ago, appears to break it. For those who are interested the working prototype can be seen at http://webapp.macrohard.co.uk If you have any ideas what I'm doing wrong any help would be appreciated! Many thanks, Sam
We'll look into what happening here. In the meantime, if you application is using DBpedia URIs, why can I actually access those URIs? For instance, have you look at some of the guidelines for attributing use of DBpedia?
You simply need to do one of the following: 1. anchor labels with DBpedia URIs using <a/>2. use <link/> via @rel in <head/> to associate your HTML pages with DBpedia URIs that are data sources for the HTML page
3. ditto using "Link: " response headers .In your case, I think you are close to #1 if you could replace the local identifiers with DBpedia URIs.
Kingsley
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