Package Exports

hylar

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Readme

HyLAR-Reasoner

HyLAR-Reasoner is an OWL 2 RL reasoner that uses JSW and OWLReasoner (https://code.google.com/p/owlreasoner/) as a triplestore and provides an additional incremental reasoning engine. The framework implementation of HyLAR is available at https://github.com/ucbl/HyLAR.

Getting started

Use HyLAR's reasoner module locally

Install locally

npm install --save hylar

Import HyLAR, then classify your ontology and query it

(currently accepts OWL 2 XML serialization only)

var Hylar = require('hylar');
var classifiedOntology, queryResults;

classifiedOntology = Hylar.classify('./fipa.owl'));

queryResults = Hylar.query('PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> ' +
                            'PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> ' +
                            'SELECT ?a ?b { ?a rdfs:subClassOf ?b }');

Use HyLAR as a server

Install HyLAR globally: npm install -g hylar
Use CLI to run HyLAR as a server: hylar --port 3000

--port <port_number> or -p <port_number> is optional. HyLAR runs at port 3000 by default.

It then outputs:

[HyLAR] Setting up routes...
[HyLAR] Done.
[HyLAR] Exposing server to port 3000...
[HyLAR] Done.
[HyLAR] HyLAR is running.

Once HyLAR is launched, it can be requested as follows:

(GET) /classify

Parameters filename (the absolute path of the ontology file to be processed) Parses and classify an ontology (OWL 2 XML serialization). Supports Classes, ObjectProperties and DatatypeProperties. This step has to be done before sending any SPARQL query (but only once, as the reasoner instance is kept in-memory).

(GET) /query

Parameters query (the SPARQL query string)