Apache Jena OWL2 Model

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.

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>

sszuev/jena-owl2