Ontology Converter v2.0

A simple command-line utility to convert any RDF graph to OWL2-DL ontology.

This is a kind of ONT-API extension. Can work both with single ontology file source and with directory containing dependent or independent ontology document sources. The utility automatically transforms the source RDF Graph to the OWL2 DL syntax according to the internal rules and command-line options. For example, if there is no owl:Ontology section inside rdf-graph (which is required by OWL), an anonymous ontology header will be generated. The tool is available in the form of code and prebuilt jar (see /releases), and as a library at jitpack.io.

Usage: java -jar ont-converter.jar [-f] [-h] -i <path> [-if <format>] -o <path> -of <format> [-p <0|1|2>] [-r] [-v] [-w]

Options:

• -f,--force Ignore any exceptions while loading/saving and processing imports.
• -i,--input The file path or not-empty directory to load ontology/ontologies. (always required) { String }
• -if,--input-format The input format. If not specified the program will choose the most suitable one to load ontology from a file. { Value should be one of [{0, ttl, TURTLE}, {1, rdf, RDF_XML, RDF/XML}, {2, rj, RDF_JSON, RDF/JSON}, {3, jsonld, JSON_LD, JSON-LD}, {4, nt, NTRIPLES, N-Triples}, {5, nq, NQUADS, N-Quads}, {6, trig}, {7, trix}, {8, trdf, RDF_THRIFT, RDF-THRIFT}, {11, owl, OWL_XML, OWL/XML}, {12, omn, MANCHESTER_SYNTAX, ManchesterSyntax}, {13, fss, FUNCTIONAL_SYNTAX, FunctionalSyntax}, {18, krss2}, {19, dl}] }
• -o,--output The file or directory path to store result ontology/ontologies.If the --input is a file then this parameter must also be a file. (always required) { String }
• -of,--output-format The format of output ontology/ontologies. (always required) { Value should be one of [{0, ttl, TURTLE}, {1, rdf, RDF_XML, RDF/XML}, {2, rj, RDF_JSON, RDF/JSON}, {3, jsonld, JSON_LD, JSON-LD}, {4, nt, NTRIPLES, N-Triples}, {5, nq, NQUADS, N-Quads}, {6, trig}, {7, trix}, {8, trdf, RDF_THRIFT, RDF-THRIFT}, {11, owl, OWL_XML, OWL/XML}, {12, omn, MANCHESTER_SYNTAX, ManchesterSyntax}, {13, fss, FUNCTIONAL_SYNTAX, FunctionalSyntax}, {18, krss2}, {19, dl}, {20, html, DL_HTML, DL/HTML}, {21, tex, LATEX}] }
• -p,--punnings The punning mode. Could be used in conjunction with --refine option. Must be one of the following:Lax mode: allows any punnings, i.e. ontology is allowed to contain multiple entity declarationsMiddle mode: two forbidden intersections: Datatype <-> Class & NamedObjectProperty <-> DatatypePropertyStrict mode: all punnings are forbidden, i.e. Datatype <-> Class and rdf:Property intersections(any pairs of NamedObjectProperty, DatatypeProperty, AnnotationProperty). { Value should be one of [{0, STRICT}, {1, MEDIUM}, {2, LAX}] }
• -r,--refine Refine output: if specified the resulting ontologies will consist only of the OWL2-DL components (annotations and axioms), otherwise there could be some rdf-stuff (in case the output format is provided by jena)
• -v,--verbose To print progress messages to console.
• -w,--web Allow web/ftp diving to retrieve dependent ontologies from imports (owl:imports),otherwise the specified directory (see --input) will be used as the only source.

Example (RDF/XML -> Manchester Syntax):

$ java -jar ont-converter.jar -i /tmp/pizza.owl.xml -if 1 -o /tmp/pizza.omn -of 12 -v

where

• -i /tmp/pizza.owl.xml - the path to existing source file, required. In the example above it is pizza.owl.
• -if 1 - the explicit input format (could be also -if rdf, -if rdf/xml or -if rdf_xml), optional.
• -o /tmp/pizza.omn - the path to target file, required.
• -of 12 - the output format (could be also -of omn, -of manchestersyntax, -of manchester_syntax), required.
• -v - to print progress info to console, optional.

Load API

Some facilities from the tool internals can be used as a library to simplify bulk loading. This can be helpful to properly handle all owl:imports dependencies. See examples:

import com.github.owlcs.ontapi.OntFormat;
import com.github.sszuev.ontconverter.api.LoadersKt;
import com.github.sszuev.ontconverter.api.ManagersKt;
import com.github.sszuev.ontconverter.api.OntologyMap;

List<OntologyMap> maps = LoadersKt.loadDirectory(Path.of("/path-to-dir-with-ontologies"), null, false, ManagersKt::createSoftManager);
maps.forEach(map -> map.getIds().forEach((iri, id) -> System.out.println("document-iri = " + iri + " => id=" + id)));
maps.forEach(map -> map.getGraphs().forEach((iri, g) -> System.out.println("document-iri = " + iri + " => triples=" + g.size())));
maps.forEach(map -> map.sources().iterator().forEachRemaining(s -> System.out.println("document-source = " + s)));

OntologyMap map = LoadersKt.loadFile(Path.of("/path-to-file-ttl"), OntFormat.TURTLE, false, ManagersKt.createSoftManager());
System.out.println(map);

Requirements:

• java-11+ tp tun
• gradle-7+ to build

Build:

• To build use gradle clean build running in the project root.
• To install into local maven repository (.m2) use gradle publishToMavenLocal
• To run from the project root use command java -jar build/libs/ont-converter.jar

Issues:

Please use /ont-converter/issues page

Dependencies:

ONT-API (version 3.0.0)

Full list of supported formats:

Name	Provider	Read / Write	Aliases (case insensitive)
TURTLE	Apache Jena	yes / yes	0, turtle, ttl
RDF_XML	Apache Jena	yes / yes	1, rdf_xml, rdf/xml, rdf
RDF_JSON	Apache Jena	yes / yes	2, rdf_json, rdf/json, rj
JSON_LD	Apache Jena	yes / yes	3, json_ld, json-ld, jsonld
NTRIPLES	Apache Jena	yes / yes	4, ntriples, n-triples, nt
NQUADS	Apache Jena	yes / yes	5, nquads, n-quads, nq
TRIG	Apache Jena	yes / yes	6, trig
TRIX	Apache Jena	yes / yes	7, trix
RDF_THRIFT	Apache Jena	yes / yes	8, rdf_thrift, rdf-thrift, trdf
OWL_XML	OWL-API	yes / yes	11, owl_xml, owl/xml, owl
MANCHESTER_SYNTAX	OWL-API	yes / yes	12, manchester_syntax, manchestersyntax, omn
FUNCTIONAL_SYNTAX	OWL-API	yes / yes	13, functional_syntax, functionalsyntax, fss
BINARY_RDF	OWL-API	yes / yes	14, binary_rdf, binaryrdf, brf
RDFA	OWL-API	yes / no	15, rdfa, xhtml
OBO	OWL-API	yes / yes	16, obo
KRSS2	OWL-API	yes / yes	18, krss2
DL	OWL-API	yes / yes	19, dl
DL_HTML	OWL-API	no / yes	20, dl_html, dl/html, html
LATEX	OWL-API	no / yes	21, latex, tex