dbpedia

get wikipedia id-page using wikidata id

由 为君一笑 提交于 2020-04-17 21:13:40
问题 Using the sparql query below, I successfully got some of soccer players informations, then I tried to retrieve wikipedia page-id with wikidata Item-id, but it returns an error (java.util.concurrent.TimeoutException): PREFIX wd: <http://www.wikidata.org/entity/> PREFIX owl: <http://www.w3.org/2002/07/owl#> PREFIX dbo: <http://dbpedia.org/ontology/> SELECT ?Wikidata_id ?SoccerPlayerLabel ?Team ?TeamLabel ?numMatches ?numGoals ?startTime ?article ?wikipedia_id WHERE { ?Wikidata_id wdt:P106 wd

how to query Dbpedia in Javascript

由 半城伤御伤魂 提交于 2020-01-23 09:54:53
问题 I want to get the Abtract of english article of civil engineering from Dbdepdia in Javascript. this is what I tried but it fail. <html> <head> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script> <style type="text/css"> </style> </head> <script type="text/javascript"> var url = "http://dbpedia.org/sparql"; var query = "\ PREFIX dbpedia2: <http://dbpedia.org/resource/>\ PREFIX Abs: <http://dbpedia.org/ontology/>\ SELECT ?abstract\ WHERE {\ ?s dbpedia2:Civil

Querying DBpedia for English-only description (with SPARQL)

由 元气小坏坏 提交于 2020-01-22 17:47:05
问题 I'm querying dbpedia.org for a description of Big Ben with this SPARQL query: select ?desc where { <http://dbpedia.org/resource/Big_Ben> <http://www.w3.org/2000/01/rdf-schema#comment> ?desc } This returns a list of descriptions in at least 10 different languages. How do I specify that I only want the English language description? 回答1: The keys you need to know are that str() and lang() pull apart the text and language of the value, so you can do this: select str(?desc) where { <http://dbpedia

Sparql query from Dbpedia and another graph returns less results than expected

由 吃可爱长大的小学妹 提交于 2020-01-16 18:07:09
问题 I'm a beginner in SPARQL and I'm working on this endpoint http://spcdata.digitpa.gov.it:8899/sparql. I'd like to join data from the DBpedia graph. I'm using the property owl:sameAs for referencing to DBpedia resources. I'd like to fetch the name and population values of all cities falling in the class pa:Comune for which a dbp:populationTotal value is defined. Here is my query: PREFIX pa: <http://spcdata.digitpa.gov.it/> PREFIX rdf: <http://www.w3.org/2000/01/rdf-schema#> PREFIX dbp: <http:/

Sparql query from Dbpedia and another graph returns less results than expected

由 醉酒当歌 提交于 2020-01-16 18:06:09
问题 I'm a beginner in SPARQL and I'm working on this endpoint http://spcdata.digitpa.gov.it:8899/sparql. I'd like to join data from the DBpedia graph. I'm using the property owl:sameAs for referencing to DBpedia resources. I'd like to fetch the name and population values of all cities falling in the class pa:Comune for which a dbp:populationTotal value is defined. Here is my query: PREFIX pa: <http://spcdata.digitpa.gov.it/> PREFIX rdf: <http://www.w3.org/2000/01/rdf-schema#> PREFIX dbp: <http:/

Query city/state/country abstracts in English

由 随声附和 提交于 2020-01-16 00:58:30
问题 I am trying to query city, state and country abstracts in English from DBpedia with mixed results. It seems to work well with City and Country but not with State. SELECT * WHERE { ?x rdfs:label "France"@en. ?x dbpedia-owl:abstract ?abstract. FILTER (LANG(?abstract) = 'en') } Or SELECT * WHERE { ?x rdfs:label "Boston"@en. ?x dbpedia-owl:abstract ?abstract. FILTER (LANG(?abstract) = 'en') } However, these queries don't find any results: SELECT * WHERE { ?x rdfs:label "Sao Paulo"@en. ?x dbpedia

DBpedia resource name standard

由 倾然丶 夕夏残阳落幕 提交于 2020-01-15 11:08:09
问题 Does DBpedia name have any standard or convention? By that, I mean, e.g., United Kingdom has a resource named United_Kingdom . But I'm seeing that the fact of having an underscore and having each word being capitalized doesn't hold. For instance, take University_of_Manchester ; if you type it as University_Of_Manchester with a capital ‘O’ in “of,” you won't get the resource. Is it obligatory to do a filtering to get the resource name in the proper case, because we may want to make all letters

DBpedia SPARQL filter does not apply to all results

由 六月ゝ 毕业季﹏ 提交于 2020-01-14 13:55:08
问题 A FILTER NOT EXISTS allows some results through when combined with OPTIONAL triples. My query: SELECT DISTINCT * WHERE { { ?en rdfs:label "N'Djamena"@en . BIND("N'Djamena" AS ?name) . } UNION { ?en rdfs:label "Port Vila"@en . BIND("Port Vila" AS ?name) . } UNION { ?en rdfs:label "Atafu"@en . BIND("Atafu" AS ?name) . } FILTER NOT EXISTS { ?en rdf:type skos:Concept } . OPTIONAL { ?en owl:sameAs ?es . FILTER regex(?es, "es.dbpedia") . } OPTIONAL { ?en owl:sameAs ?pt . FILTER regex(?pt, "pt

DBpedia SPARQL filter does not apply to all results

由 廉价感情. 提交于 2020-01-14 13:54:27
问题 A FILTER NOT EXISTS allows some results through when combined with OPTIONAL triples. My query: SELECT DISTINCT * WHERE { { ?en rdfs:label "N'Djamena"@en . BIND("N'Djamena" AS ?name) . } UNION { ?en rdfs:label "Port Vila"@en . BIND("Port Vila" AS ?name) . } UNION { ?en rdfs:label "Atafu"@en . BIND("Atafu" AS ?name) . } FILTER NOT EXISTS { ?en rdf:type skos:Concept } . OPTIONAL { ?en owl:sameAs ?es . FILTER regex(?es, "es.dbpedia") . } OPTIONAL { ?en owl:sameAs ?pt . FILTER regex(?pt, "pt

Query DBpedia to get meta-data for Books

由 江枫思渺然 提交于 2020-01-14 12:39:51
问题 I have a bunch of ISBN's. I want to query DBpedia and get the meta-data of the books. I am unable to understand the SPARQL . Can someone tell me how can I get the meta-data of a book from DBpedia in Java? 回答1: SPARQL is both a query language and a protocol to query so-called SPARQL endpoints . A SPARQL query that asks DBpedia for a book (or books) that have the ISBN 0-553-05250-0, and its (or their) associated properties and values is this: select distinct ?book ?prop ?obj where { ?book a dbo
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