dbpedia

问题 When I run this code in java I am getting error, I think the error occurred because of "String values". I am not sure about adding it but I got this idea from my previous question's answer which I asked in this site Query DBpedia to get abstract for different inputs public static void DbpediaResultSparql() { String values = "New York"; String service = "http://dbpedia.org/sparql"; String sparqlQueryString2 = "PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>"+ "PREFIX dbpedia-owl: <http:/

问题 I need a sparql query that given a free text (user input), it finds me from dbpedia all the classes related to it. How do it? 回答1: Also asked here. Accepted answer said -- When you say classes, are you mean about types? If yes, try something like SELECT ?uri ?label ?type WHERE { ?uri rdfs:label ?label . ?uri <http://dbpedia.org/ontology/type> ?type . FILTER regex(str(?label), "Leipzig") . } limit 10 I couldn't let this go... PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX virtdrf:

问题 I've asked a question before here Generate an incremental SPARQL query and thank god I manage to solve it. Here is my solution: private String completeQuery(String coreQuery){ String completeQuery = ""; completeQuery += "SELECT * WHERE {"+ "\n"; completeQuery += coreQuery + "\n"; completeQuery =completeQuery + "}" + "\n" +"limit 5" ; return completeQuery; } public String link(String object1, String object2, int distance){ if(distance == 1){ String Quer = "<http://dbpedia.org/resource/"

问题 I am trying to create a SPARQL query which gets the charity organisations and their location from DBpedia. Here is the link to one charity -- http://dbpedia.org/page/Stonewall_(charity). I am trying to get all the charities that exist with the names and location. I want to retrieve dbp:name along with dbo:headquarter . 回答1: You could try this: select distinct ?name (group_concat(?headquarter;separator=",")) where {?s a dbo:Organisation. ?s dbo:status "Charity". ?s dbp:name ?name. ?s dbo

问题 I'm trying to filter out certain properties (e.g dbpprop: ones) from the result of a sparql query. I'm querying dbpedia sparql endoint. More precisely what I'd like to do is expressed by the following pseudo code : quantity_of_interest, property, value, property_type = sparqlQuery(query) if property_type == rdf:Property: pass else: return quantity_of_interest, property, value For now, I filter out the properties afterwards in some python code and I use the following sparql query : SELECT

问题 I'm trying to filter out certain properties (e.g dbpprop: ones) from the result of a sparql query. I'm querying dbpedia sparql endoint. More precisely what I'd like to do is expressed by the following pseudo code : quantity_of_interest, property, value, property_type = sparqlQuery(query) if property_type == rdf:Property: pass else: return quantity_of_interest, property, value For now, I filter out the properties afterwards in some python code and I use the following sparql query : SELECT

问题 I wrote a query in DBpedia SPARQL: select distinct ?s where { ?s rdf:type dbo:Writer. ?s rdf:type yago:LivingPeople. ?s dbo:birthDate ?year. FILTER (?year > 1964-01-01). } but it is showing: Virtuoso 42000 Error The estimated execution time 82850 (sec) exceeds the limit of 240 (sec). What is the problem? How can I solve this? 回答1: The error message tells you the problem -- processing the query is expected to take 82850 seconds, but the server is set to only run for 240 seconds. You can solve

问题 I have problem with SPARQL. I want to select something from category. For example subjects. I make query like this in http://dbpedia.org/snorql. SELECT ?category ?subject WHERE { ?category a skos:Concept . ?category skos:Concept: American_punk_rock_guitarists. ?category dct:subject ?subject . } LIMIT 1000 I have error Virtuoso 37000. I don't understand why. P.S. Is it good book for beginnier in SPARQL - Learning SPARQL, 2nd Edition Querying and Updating with SPARQL 1.1 ? 回答1: You have at

问题 I am trying to collect POIs per State in the United States. The original query was select distinct ?s ?state where { ?s a dbpedia-owl:Place; dcterms:subject/skos:broader{,9} ?state . ?state skos:broader category:Buildings_and_structures_in_the_United_States_by_state . filter contains(str(?state),'_in_') . filter(!contains(str(?state),'United_States')) } The filter portion was to find the US states(shown below) such that, at the end we know each POI belongs to what state. The approach did not

问题 I have following query: # endpoint used: https://query.wikidata.org/ # # PREFIX wd: <http://www.wikidata.org/entity/> # PREFIX wdt: <http://www.wikidata.org/prop/direct/> PREFIX dbo: <http://dbpedia.org/ontology/> PREFIX dbp: <http://dbpedia.org/resource/> SELECT DISTINCT ?musicianLabel WHERE { { # *** dbpedia *** SERVICE <http://dbpedia.org/sparql> { #SERVICE <http://lod.openlinksw.com/sparql> { ?musician a dbo:Person . { # person, who has musical genre xy ?musician dbo:genre ?genre . }