sparql

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No results when running a SPARQL on an rdf document

I\'m new to SPARQL querys and I\'m using twinkle SPARQL to run a query on an rdf document that contians:[详细]

2023-02-03 02:20 分类：问答
[SPARQL/DBPedia]make a query with a zip-code and get some information about the city

Hey, i want to make a query with a zip-code to get some informations about the City. But how it works? Can someone tell me 开发者_开发百科how the query must look?[详细]

2023-02-01 00:33 分类：问答
[SPARQL/DBPedia]can I catch the german wikipedia-URL from a result?

Can someone help me to catch the link for the German 开发者_运维技巧Wikipedia article? For example, I have a query for all German films:[详细]

2023-01-31 17:27 分类：问答
Problem with SPARQL query

I have the following query that is not working: PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema%23>[详细]

2023-01-29 00:57 分类：问答
Whats wrong with this SPARQL query?

String sparql = \"\"; sparql+= \"PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>\\n\"; sparql+= \"PREFIX i: <http://evolizer.org/ontologies/seon/2010/09/softwaremetrics.owl#>\\n\";[详细]

2023-01-28 20:06 分类：问答
Annotating sensor data but no rdf:type

I\'m annotating sensor observations using JENA, RDF and the W3C SSNXG\'s sensor ontology. I\'ve created an individual of the SSNXG\'s SensingDevice using a local namespace for the individual. When I[详细]

2023-01-28 13:52 分类：问答
Get all nodes in a transitive relation

Is it somehow possible to get the list of nodes connected through a transitive relation with SPARQL? I have elements that are connected in this way:[详细]

2023-01-22 21:03 分类：问答
What should I do with this SPARQL result in Jena?

I created a simple query to show subjects with value of a DataType property. This query runs in Protege 3.4.3. But when I run in Jena I receive this title \"com.hp.hpl.jena.sparql.engine.ResultSetStr[详细]

2023-01-21 11:31 分类：问答
how we can create a query based on SPARQL to see the value of some data type property?

I create this query: PREFIX VB: <http://VBnet#> SELECT?x ?y WHERE { ?x VB:HasName ?y } HasName is one datatype property.When I run this query in Protege, system show me just the subject 开发[详细]

2023-01-21 01:23 分类：问答
Expressing quantities in RDF

I want to be able to answer queries like \"how many records were created and have log_id 001\" or \"how 开发者_StackOverflow社区many records have been deleted with attribute \"00EA\".[详细]

2023-01-20 19:52 分类：问答