sparql

问题 I am writing a SPARQL query that should delete all triples within in this resource. prefix oslc: <http://open-services.net/ns/core#> prefix example: <http://rdf.company.com/ns/something/net#> prefix xsd: <http://www.w3.org/2001/XMLSchema#> prefix dcterms: <http://purl.org/dc/terms/> prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> example:Resource2 a oslc:ResourceShape ; oslc:describes example:Resource2 ; oslc:property [ a oslc:Property ; oslc:isMemberProperty true ; oslc:name "pgn"

问题 I have got a list of 1200 geographic enties like cities, lakes oder mountains as strings. I would like to enrich these enties with the authority file WikiData ID. This works but as result I get sometimes more than one WikiDataID suggestion. I need to define the right one by the apperance of an country in the Statements. As an example I tried the city Karlsruhe. For the string "Karlsruhe" I get three results. But I want just one specific WikiData ID (in this case: https://www.wikidata.org/wiki

问题 what's the level of support of SPARQL in protege 5.2.0 SPARQL Query Plugin 2.02? I tried using FILTER STRSTARTS(STR(?subject), STR(prefix:)) and I get Unknown function 'http://www.w3.org/2005/xpath-functions#starts-with' I can't seem to find a listing with the supported functions and capabilities. Thanks 来源： https://stackoverflow.com/questions/53299218/sparql-support-protege-5

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . My project is building a Java web application on top of the AllegroGraph RDF store. I would like to find a good solution to map between the triples that come out of the store and our domain objects. I have looked into Topaz, an Object/Triple mapping API being developed in the spirit of Hibernate. The trouble is

问题 The following SPARQL query fetches only 2500 records with actors and films I don't know why its limited to 2500: PREFIX dcterms: <http://purl.org/dc/terms/> PREFIX movie: <http://data.linkedmdb.org/resource/movie/> SELECT ?id ?filmTitle ?actorName WHERE { SERVICE <http://data.linkedmdb.org/sparql> { ?film a movie:film ; movie:filmid ?id ; dcterms:title ?filmTitle ; movie:actor [ a movie:actor ; movie:actor_name ?actorName ]. } } The query is from an answer to the question: Querying the Linked

问题 I want to query my ontology based on annotations with datatype of float and string. For instance I have an individual that has an annotation "EBC_value" of type float and an annotation "Label" of type String. How do I do this? I have tried with REGEX, like this, but it doesn´t work. I don´t get any errors, just no results. PREFIX ont: <http://vestbrygg.no/ontologies/beer.owl#> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX owl: <http://www.w3.org/2002/07/owl#> PREFIX xsd:

问题 I want to find instances of scientists who both were born and died in prime-numbered years. Building on a previous discussion at this URL, I devised the following query, which is unwieldy and times out: SELECT ?birthYear ?deathYear ?scientist ?scientistLabel WHERE { { select ?value1 { ?number wdt:P31 wd:Q49008. ?number wdt:P1181 ?value1 filter(?value1 < year(now())) } } { select ?value2 { ?number wdt:P31 wd:Q49008. ?number wdt:P1181 ?value2 filter(?value2 < ?value1) } } ?scientist wdt:P106 wd

问题 I was going through this link, which uses EXPLAIN() to show us the SQL query that Virtuoso generates(uses internally) for the input SPARQL query. I tried it on my Virtuoso 7.x version and found that I get a different output. I am not able to understand the output fully. Would it be possible to explain what this output from iSQL means and how I would interpret a SQL query from this? The SPARQL query is SPARQL SELECT DISTINCT ?s FROM <http://dbpedia.org> WHERE { ?s a <http://dbpedia.org

问题 I'm working with an ontology OWL and making a query about it. My query is: "PREFIX a: http://www.owl-ontologies.com/Indoor.owl# " + "SELECT ?X " + "WHERE { ?X a:hasDay a:" + day + " . " + " ?X a:hasRoom a:" + room + " . " + " ?X a:hasStartTime a:" + startTime +" }"; At the moment to make the query, the console of NetBeans throw me: Undefined object property used in query: http://www.owl-ontologies.com/Indoor.owl#hasStartTime But hasStartTime in the ontology isn't an object property, it is a

问题 SPARQL on REGEX filter name works when I use direct search query. It is not working on regex using query. PREFIX dbpedia: <http://dbpedia.org/> PREFIX dbpedia2: <http://dbpedia.org/property/> PREFIX dbpedia-owl: <http://dbpedia.org/ontology/> PREFIX dcterms: <http://dublincore.org/2010/10/11/dcterms.rdf#> PREFIX foaf: <http://xmlns.com/foaf/0.1/> PREFIX geo: <http://www.w3.org/2003/01/geo/wgs84_pos#> PREFIX grs: <http://www.georss.org/georss/point> PREFIX rdf: <http://www.w3.org/1999/02/22