jena

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get OWL restrictions on classes using Jena

Using the pizza ontology, I want to be able to look up all the toppings for American pizza. If I open the ontology in Protégé, I can see that American pizza has the following restrictions:[详细]

2023-04-13 01:06 分类：问答
Generating URIs in Jena for RDF

I am generating an RDF file programmatically in Jena i.e. when I am inserting data in the rdf (instances) i need to have an unique URI (which will refer to the resource), somewhat like primary key in[详细]

2023-04-12 07:53 分类：问答
to parse .rdfs file

below is my .rdfs file. i need to get YYYY if my input is XXXX. How do i do it. <rdfs:Class rdf:about=\"&kb;XXXX\"[详细]

2023-04-12 02:36 分类：问答
openrdf-sesame SPARQLResultsXMLWriter and XSL

how can i add xsl stylesheet in XML out stream provided by SPARQLResultsXMLWriter? RepositoryConnection con = repository.getConnection();[详细]

2023-04-11 23:46 分类：问答
Manipulating RDF in Jena

currently, I found out that I can query using model (Model) syntax in Jena in a rdf after loading the model from a file, it gives me same output if I apply a sparql query. So, I want to know that , is[详细]

2023-04-11 23:14 分类：问答
SPARQL query: how to get line and char number from EARL document?

This might be a rather novice question but RDF graphs and sparql queries just confuse me. This is the relevant part of an (EARL, Evaluation And Report Language) RDF file that I need to search:[详细]

2023-04-11 16:44 分类：问答
Jena TDB in Python?

Is it possible to run a Jena TDB database from a Python app to store a large amount of RDF data? What wou开发者_JS百科ld be a native alternative in Python?An alternative is to use a SPARQL endpoint su[详细]

2023-04-09 23:14 分类：问答
Extracting FOAF information from Jena

I\'m new here,and i have some problem about FOAF. I use jena create a FOAF like this : <rdf:type rdf:resource=\"http://xmlns.com/foaf/0.1/Person\"/>[详细]

2023-04-08 07:34 分类：问答
How to improve the SPARQL query performance of SDB?

In my application, i used the SPARQL database is SDB of Jena, and the database server is DB2. but i find the query performance of SPARQL is very low.[详细]

2023-04-05 14:49 分类：问答
Is it possible to fire Java methods from Jena SWRL Rules

I am working on a Performance analysis on Ontology based Context Management and Process based Context Management.[详细]

2023-04-03 12:07 分类：问答