jena

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Updating OWL issue with JENA library and Protege

I can\'t save any writing update to my RDF/XML OWL file using Protege. Each time I close the application I then lose all of my editing.[详细]

2023-01-30 00:30 分类：问答
JenaException: Invalid properties file

I have been working with Jena fine for the first few weeks. However, today tomcat has started spitting out errors.[详细]

2023-01-28 17:05 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
JENA: initializing a HSQLDB RDF datastore

I\'m trying to initialize a RDF datastore using Jena and HSQLDB. From http://jena.sourceforge.net/DB/hsql-howto.html I wrote the following code:[详细]

2023-01-25 22:53 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
Build failures Jena on Android (Androjena)

I am currently working on a mobile application which uses OWL ontologies. I am planning on using the androjena lib which is a port of the java jena lib.[详细]

2023-01-19 05:17 分类：问答
How to get the minCardinality of properties?

I am using Jena. How 开发者_C百科can I get the minCardinality of a property?Try asking on SemanticOverflow.comLet me guess... it\'s a class assignment? Maybe ask Fateme. :)[详细]

2023-01-19 03:12 分类：问答
Loading an ontology (owl) using jena and show its graph

Im working in a project where I have to load any ontology (is chosen by the user) in .owl language and display its graph as a tree menu. It means the onto开发者_如何学运维logy can be any size.[详细]

2023-01-18 01:57 分类：问答
Managing transactions with AllegroGraph's Jena API

I\'m uncertain as to the behaviour of the AllegroGraph triple store in regard to transactions. The tutorial talks about using two connections, but does not mention Jena models.[详细]

2023-01-16 08:57 分类：问答