sparql

问题 First of all, I didn't make a minimum example because i think that my problem can be understood without it. Second, I didn't give you the data because i think that my problem can be solved without it. However, I'm open to give it to you if you ask. This is my query: select distinct (?x as ?likedItem) (?item as ?suggestedItem) ?similarity ?becauseOf ((?similarity * ?importance * ?levelImportance) as ?finalSimilarity) { values ?user {bo:ania} #the variable ?x is bound to the items the user

问题 I am using two different HTTP POST utilities (poster out of Firefox as well as Python requests API) to post a simple SPARQL insert to Virtuoso . My URL is: http://localhost:8890/sparql My request parameters are: default-graph-uri: <MY_GRAPH> should-sponge: soft debug: on timeout: format: application/xml save: display fname: I put the actual SPARQL ( INSERT DATA { GRAPH... ) in the content of the message. I tried different content types, none of which worked. I do get 200 but the response is

问题 I need some help to write my update query. DELETE { ?contactInfo vivo:freeTextValue5 ?o . } INSERT { ?contactInfo vivo:freeTextValue5 "new_url"^^<http://www.w3.org/2001/XMLSchema#string> . } WHERE { ?contactInfo vivo:freeTextValue5 "old_url"^^<http://www.w3.org/2001/XMLSchema#string> . } Can you please let me know what is wrong with this "update" query? 回答1: I'm guessing that your problem is that this update adds a new triple, but does not remove the old one. The reason is that your DELETE

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 a graph of RDF data, that is the result of a SPARQL query in rdflib , but this question is valid just on any endpoint too. The graph looks like the picture below. I want to find a way to query the nodes that are shared between two clusters. Those are basically the nodes that are: Subject to two objects Object to two subjects Object to a subject, and, then subject to another object I tried with Graph.subjects() and Graph.objects() on rdflib it seems to me that they are only iterable and

问题 How to extract all actuators that are switched off when there are no users at home. I tried to write Jena rule but am unable to get proper output. I have added desired result that I want. Need help with writing rule. [rule1: noValue(:users :hasLocation :home) -> (:actuators :hasLocation :home) (:actuators :state "OFF"^^xsd:boolean)] [rule2: noValue(:users :hasLocation :home) -> (?x rdf:type :actuators) (?x :hasLocation :home) (?x :state "OFF"^^xsd:boolean)] { rulex: [noValue(:subject1

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 . }

问题 I'm doing federation query exercise. I want the list of films that stars with leonardio di caprio and also the list of directors that worked with him. I have to design federated SPARQL query over Wikidata and Dbpedia. I have to run the query through FEDx. Here's the query. This is done in Eclipse. Also tested on the wikidata endpoint. PREFIX wd: <http://www.wikidata.org/entity/> PREFIX wdt: <http://www.wikidata.org/prop/direct/> PREFIX dbo: <http://dbpedia.org/ontology/> PREFIX dbr: <http:/

问题 While examining the results of the official example query "Continents, countries, regions and capitals" (on https://query.wikidata.org/, limited to Germany for your convenience here: link), I noticed that some capitals of German federal states were missing. For example Wiesbaden as capital of Hesse. I noticed that Wiesbaden is an instance of big city , but not of city (see https://www.wikidata.org/wiki/Q1721), in contrast to some other cities. I was able to alleviate the problem by also

问题 I want to query DBpedia with DBpedia Live endpoint. I have this query : SELECT * WHERE { ?x a dbo:Person . ?x rdfs:label "Usain Bolt"@en . } This query gives the correct answer with most names I tried (for example “Teddy Riner"@en ) but it fails with Usain Bolt and Rachid Badouri. I don’t get why as their DBpedia pages (Teddy Riner, Usain Bolt) are constructed the same way: they both have a rdfs:label , which is written exactly like I did. It seems to me that there is an incoherence between