dbpedia

问题 I am writing an "auto-wikifier" tool using HTML and JavaScript. For each word in the text to be wikified, I need to obtain a list of pages that contain that word (so that the matching phrases in the text can be automatically wikified, if they are found). Is there a way to obtain a list of all Wikipedia pages that contain a specific word, using one of Wikipedia's APIs or web services? function getMatchingPageTitles(theString){ //get a list of all matching page titles for a specific string,

问题 I'm using below query to find all properties with domain of city (or superclasses of city) or range of country (or superclasses of country) from DBPedia ontology. when I use path with fixed length there is no problem but when I put * to define paths with arbitrary length, I get this error: Virtuoso 37000 Error SP031: SPARQL compiler: Variable '_::trans_subj_6_4' is used in subexpressions of the query but not assigned my SPARQL: define sql:signal-void-variables 1 define input:default-graph-uri

问题 I'm getting an error with my SPARQL query but can't find it out: Query PREFIX owl: <http://www.w3.org/2002/07/owl#> PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX dbpedia-owl: <http://dbpedia.org/ontology/> PREFIX : <http://dbpedia.org/resource/> PREFIX dbpedia2: <http://dbpedia.org/property/> PREFIX dbpedia: <http://dbpedia.org/> SELECT DISTINCT ?lat, ?long { :Taj_Mahal

问题 I dabbled with DBpedia a couple of years ago and find it fascinating, but now that I want to perform a query after not using it for ages, I find it totally impenetrable. What SPARQL query should I issue to retrieve the set of all Wikipedia pages that are members of both "Category ABC" and "Category XYZ"? All of the examples I can find seem to be quite a bit more involved than my seemingly basic question, making it difficult to distil something minimal. (As an example I'd like to find all

问题 I'm making that SPARQL query: PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> SELECT ?label WHERE { <http://pt.dbpedia.org/resource/Brasil> rdfs:label ?label.} and I don't get any results for ?text . I checked that URI on my browser and found the rdfs:label property there. Is that problem caused by the URI form http://pt.dbpedia.org/ ? I've already used the same query with IRIs starting with http://dbpedia.org/resource/ , e.g.,

问题 I'm using Travis CI with my github repo(java project). One of my tests gets data from Dbpedia using SPARQL and Jena. It causes many records i get to be printed in the log into Travis output and thus Travis fails. A log example for instance: 14:52:58.756 [main] DEBUG org.apache.http.wire - http-outgoing-1 << " { "pname": { "type": "literal", "xml:lang": "en", "value": "Yuen Poovarawan" }[0x9], "photo": { "type": "uri", "value": "http://commons.wikimedia.org /wiki/Special:FilePath/Yuen

问题 I would like to write this SPARQL query in Java using Jena: prefix dbpediaont: <http://dbpedia.org/ontology/> prefix dbpedia: <http://dbpedia.org/resource/> prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> select ?resource where { dbpedia:Fred_Guy rdf:type ?resource filter strstarts(str(?resource), "http://dbpedia.org/ontology") } I'm using this code: public QueryExecution query(){ String stringa = "http://dbpedia.org/resource/Fred_Guy"; ParameterizedSparqlString qs = new

问题 the code is for querying dbpedia from java program and then displaying the result in html page package jenaamem; import com.hp.hpl.jena.query.Query; import com.hp.hpl.jena.query.QueryExecution; import com.hp.hpl.jena.query.QueryExecutionFactory; import com.hp.hpl.jena.query.QueryFactory; import com.hp.hpl.jena.query.ResultSet; import com.hp.hpl.jena.query.ResultSetFormatter; import com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP; public class db2 { static public void main(String...argv) {

问题 Using SPARQL, I am trying the get the list of all english novels and their properties. I would also like to find if a movie was taken based on that novel and get the movie name and its director, If a movie relationship exists. Code: SELECT ?movie ?director ?book ?author ?publisher ?illustrator WHERE { ?movie dcterms:subject <http://dbpedia.org/resource/Category:films> ; dbpedia-owl:basedOn ?book . ?movie dbp:director ?director . ?book a dbpedia-owl:Book . ?book dbp:author ?author . ?book dbp

问题 is there any way to generate a SPARQL query in a dynamic way? what I'm trying to do is some thing like this: if I have a DBpedia resource r1 and another DBpedia resource r2, this query SELECT * WHERE { <r1> ?pre <r2> } will return the predicate between the 2 resources and this query SELECT * WHERE { <r1> ?pre1 ?obj1 . ?obj1 ?pre2 <r2> } will return all the predicates and object between these two resources ( in two steps) and so on I'm trying to build this query in such a way that it will