Top "Jena" questions

Apache Jena is an open-source Java library for processing RDF data in semantic web and linked-data applications.

Where do I test my queries for my RDF written in SPARQL

I am a beginner with Semantic Web technologies, My question might be a very basic one but I am really …

rdf sparql jena
List object properties from a instance in Jena

How can I list all Object Properties associated to a instance in Jena? For example: A Person has an Object …

list jena object-properties object-property
DBpedia SPARQL Querying for a specific rdfs:label

Basically I have a query (shown below) which works efficiently. However, I want my search to be more precise where …

sparql jena dbpedia arq
How to resolve IncompatibleClassChangeError interface not implemented

I know the question is asked already but somehow I can't find any convincing solution after googling for about an …

java jena openrefine apache-jena
Jena: how to query data from model?

Is it possible to query data from a Model without writing sqarql-queries? Adding properties to resources or resources to models …

java sparql jena ontology
Using SWRL with Jena and Pellet

I was unable to find some decent simple code examples of using SWRL and Jena with Pellet, or at least …

jena semantic-web pellet swrl
Jena/ARQ: Difference between Model, Graph and DataSet

I'm starting to work with the Jena Engine and I think I got a grasp of what semantics are. However …

java jena
SPARQL query using Jena producing no results — but works online

Basically I have the following query, and it works in all the online SPARQL testers without a problem, but when …

java sparql jena dbpedia
Jena TDB to store and query using API

I am new to both Jena-TDB and SPARQL, so it might be a silly question. I am using tdb-0.9.0, on …

java jena
Combine multiple sets of rows in SPARQL

I cannot describe my problem formally due to my bad English; let me tell it using an example. The table …

java sparql jena