Apache Jena OWL2 Model

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NOTE: This library has been integrated into Apache Jena starting from version 5.1.0 (:jena-ontapi). The current repository will remain available for compatibility with Apache Jena 4.x.x.

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Summary

This is enhanced Apache Jena Inference RDF Model with OWL2 support. The original code is taken from ONT-API.

Motivation

com.github.owlcs.ontapi.jena.model.OntModel covers OWL2 syntax but not inference and OWL profiles.
org.apache.jena.ontology.OntModel supports inference, but only follows OWL1 specification.

This project closes this gap by providing a fully functional ontology RDF model for working with OWL2.

Major components

• OntModel - the main interface to work with OWL2 & OWL1 & RDFS ontologies
• OntModelFactory - factory for creating different OntModel types
• GraphRepository - graph store accessor
• OntSpecification - encapsulates ReasonerFactory, OntConfig, OntPersonality
• UnionGraph - a Graph implementation with support hierarchy
• OntModelConfig - model configuration, defines what a model can do and what it cannot do
• OntPersonality - a configuration class to conduct Jena's polymorphism for OntObjects

Supported specifications

• OWL2 DL & Full: NO_INF, RULES_INF, RDFS_INF, TRANS_INF + BUILTIN_INF (default)
• OWL2 EL: NO_INF, RULES_INF, RDFS_INF, TRANS_INF
• OWL2 QL: NO_INF, RULES_INF, RDFS_INF, TRANS_INF
• OWL2 RL: NO_INF, RULES_INF, RDFS_INF, TRANS_INF
• OWL1 DL & Full: NO_INF, RULES_INF, RDFS_INF, TRANS_INF, MICRO_RULES, MINI_RULES
• OWL1 Lite: NO_INF, RULES_INF, RDFS_INF, TRANS_INF
• RDFS: NO_INF, RDFS_INF, TRANS_INF

Example

GraphRepository repository = GraphRepository.createGraphDocumentRepositoryMem();

OntModel m = OntModelFactory.createModel(OntSpecification.OWL2_DL_MEM_BUILTIN_INF, repository)
        .setNsPrefixes(OntModelFactory.STANDARD);

m.setID("ont").setVersionIRI("ont#v1");

OntObjectProperty p = m.createObjectProperty("p");
OntClass a = m.createOntClass("a");
OntIndividual i = a.createIndividual("i");
OntClass b = m.createOntClass("b")
        .addSuperClass(m.createObjectIntersectionOf(a, m.createObjectHasValue(p, i)));

m.ontObjects(OntClass.class).forEach(System.out::println);
m.ontObjects(OntIndividual.class).forEach(System.out::println);

m.write(System.out, "ttl");

Available via jitpack

<repositories>
    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>
</repositories>

<dependencies>
    <dependency>
        <groupId>com.github.sszuev</groupId>
        <artifactId>jena-owl2</artifactId>
        <version>{{latest-version}}</version>
    </dependency>
</dependencies>

Apache License Version 2.0