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Feed "answers.semanticweb.com"

April 14, 2016

When youre wisdom las vegas teeth whitening dentist are getting taken out does it hurt?

March 22, 2016

How can I use a class/resource and properties of dbpedia using protege ontology?

March 12, 2016

How can i get flag image from dbpedia?

March 08, 2016

Hello, I'm currently trying to extract the names of all islands listed in Wikipedia together with its total area and some other information regarding the islands. I've managed to extract the names and also some other properties from DBpedia with SPARQL, but the area is not working properly. I've recognized that the problem is caused by the fact that the area is often not tagged in the RDF...

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June 23, 2016

I am a novice in Semantic Web and I would like to retrieve all property-value pairs of "apple" from DBPedia using SPARQL query. Below I have written the query in http://dbpedia.org/sparql editor, but it returns no any results.Could you tell me where I make a mistake, please?

PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>...

June 22, 2016

I'm trying to filter by datatype in DBpedia. For example:

SELECT * WHERE {?s ?p ?o . FILTER ( datatype(?o) = xsd:integer) } LIMIT 10

But I get no results, while there are certainly integer values. I get the same from other endpoints using Virtuoso, but I do get results from alternative endpoints. What could be the problem? If Virtuoso does not implement this SPARQL...

June 21, 2016

I have a query that gets some objects and attributes. For example

PREFIX rdf:<http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs:<http://www.w3.org/2000/01/rdf-schema#> SELECT DISTINCT * { ?company a <http://dbpedia.org/ontology/Company> . OPTIONAL { ?company <http://dbpedia.org/ontology/industry> ?industry . } OPTIONAL { ?company <http://dbpedia....

June 20, 2016

Can any one help me to explain in a simple way how to query data from Dbpedia using SPARQL all the articles on internet explain how to write SPARQL query but I have a good knowledge in SQL so I just I did not understand how to call Dbpedia properties like rdf:label or owl and the other properties

June 20, 2016

I am using DBpedia endpoint using Jena. I am sending SPARQL query to retrieve the objects and predicates of an object (say for example, http://dbpedia.org/page/London). How to get the following two result sets:-

  1. All predicates and objects of London in labels as shown here (...

June 17, 2016

dbpedia.org is down about 24 hours (may be more) due a hardware problem. Does any DBPedia online mirror exist with SPARQL endpoint? (with possibility to save the query results)

June 14, 2016

I would like to query on DBPedia using Java. Below is my code and it does not return corrrect result.I want to get Abstract part from [http://dbpedia.org/page/Ibuprofen page and label name. but it returns only http://dbpedia.org/resource/Ibuprofen 11 times. If...

June 12, 2016

I've set up a local Dbpedia mirror - individual queries work just fine but I'm getting the following errors from Virtuoso when I try a higher amount of queries:

17:45:46 WARNING: * Monitor: System is under high load. Adding cluster nodes or using more replicated copies may needed 17:47:03 WARNING: * Monitor: Locks are held for a long time 17:47:40 WARNING: * Monitor: No Web Server threads...

June 08, 2016

I run a SPARQL construct query on DBpedia endpoint. The query is for getting all the information describing all movies:

construct { ?s ?p ?o } where { ?s a <http://dbpedia.org/ontology/Film>. { SELECT ?s ?p ?o { ?s ?p ?o } group by ?s ?p } }

The query works fine. The problem is DBpedia stops it at 10.000. I tried to make the offset 0 but it does make any...

June 08, 2016

I am working on movies datasets. My program retrieves their links, predicates and the value of each of the predicates. I want to download the minimum DBpedia RDF dumps needed for that. I went to this page http://downloads.dbpedia.org/3.5.1/en/ and I could not decide which of them is required for the completion of this task....