sparql

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How to run IN and NOT IN SPARQL statements in python rdflib to remove the intersection of two graphs

开发者_JAVA技巧I\'m trying to use the IN and NOT IN statements (that were if I understand correctly, introduced in SPARQL 1.1) on the python implementation of SPARQL (now in rdfextras) but it seems th[详细]

2023-02-28 08:32 分类：问答
SPARQL Select two columns

I\'m new to SPARQL and I\'m trying to select two or more data properties f开发者_如何学Pythonrom entity.[详细]

2023-02-26 00:01 分类：问答
How to get namespace of the property in dbpedia by giving the property name using jena?

I am trying to 开发者_JAVA百科get the value of property genre in the following dbpedia link using sparql in jena http://dbpedia.org/page/Black_Sabbath[详细]

2023-02-26 00:00 分类：问答
Exception while using createOntologyModel

package tutorial; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException;[详细]

2023-02-25 19:41 分类：问答
Attempt to have ResultSet from a CONSTRUCT query Exception

i am attempting to use the following query: QUERY=\"PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> \\n\" +[详细]

2023-02-25 17:56 分类：问答
Sparql Query Format

i am getting the 开发者_开发知识库 results of a query as sodium^^http://www.w3.org/2001/xmlschema/string[详细]

2023-02-25 13:48 分类：问答
Create query in sparql using jena without hard coding the query? [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical andcannot be reasonably answered in its current form. For help clari[详细]

2023-02-25 04:58 分类：问答
Exception while Querying ontology

QUERY=\" PREFIX table: <http://www.daml.org/2003/01/periodictable/PeriodicTable#> \\n\"+ \"SELECT ?name ?symbol ?weight ?number \\n\"+[详细]

2023-02-24 23:58 分类：问答
How to select random DBPedia nodes from SPARQL?

How can I select random sample from DBpedia using the sparql endpoint? This query SELECT ?s WHERE { ?s ?p ?o . FILTER ( 1 > bif:rnd (10, ?s, ?p, ?o) ) } LIMIT 10[详细]

2023-02-24 21:47 分类：问答
Ontology similar to PeriodicTable for integrated search

I am developing an application that queries PeriodicTable ontology. Is 开发者_如何学Gothere some other ontology similar to this that can be queried with it? Basically, I am in search of ontology that[详细]

2023-02-24 09:22 分类：问答