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GATE Ontology Tools

GATE Training CourseOctober 2006

Kalina Bontchevakalina@dcs.shef.ac.uk

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Ontology Plugins (gate 3.1)

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OWLIM support (v. 4.0)

• Loading and viewing ontologies is the same from the GATE GUI

• Storage and reasoning performed by OWLIM• Access is via a web service

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Create New Ontology LR

• Example uses Jena as a backend• Loads an ontology over the Web, in this case

Proton (http://proton.semanticweb.org/)• Supports OWL (Lite, DL, Full) & RDF – as this is

what Jena supports

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Loading extra data

http://www.dcs.shef.ac.uk/~kalina/test/test-input.rdf

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View classes

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View instances

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Forthcoming ontology editor features

• Deleting classes, properties and instances• Adding classes, properties and instances• Modifying above

• We need these features so that we can correct the results of ontology learning and ontology population algorithms from within GATE

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Ontology API

FeatureMap features = Factory.newFeatureMap();

features.put("ontologyURL", ontologyURL);

JenaOntologyImpl ontology = (JenaOntologyImpl) Factory.createResource("gate.creole.ontology.jena.JenaOntologyImpl",features);

Interface gate.creole.ontology.Ontology• add/get/delete concepts/instances/properties

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Ontology API (2)

// adding a new class Person – class name and commentOClass person = ontology.createClass("Person","All humans");// adding a new class ManOClass man = ontology.createClass("Man", "Male Person");// adding a new class LiquidOClass liquid = ontology.createClass("Liquid","anything that is in

liquid form");// John is a personOInstance john = ontology.addInstance("John", person);// water is liquidOInstance water = ontology.addInstance("Water", liquid);// Man is a subclassof Personperson.addSubClass(man);// Man drinks liquidontology.addObjectProperty("drinks","man drinks liquid", man,

liquid);// john drinks liquidjohn.addPropertyValue("drinks", water);

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Onto gazetteer

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Onto Gazetteer (2)

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JAPE and Ontologies

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ResultsResults of sample rule without ontology as a parameter

Results of sample rule with ontology as a parameter

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Sample use

• Knowledge Management and business intelligent– gate.ac.uk/projects/sekt/

• Media analysis – gate.ac.uk/projects/media-campaign/

• Multi-media semantic annotation– gate.ac.uk/projects/prestospace/

• Software Engineering– gate.ac.uk/projects/tao/

• Also used in an increasing number of commercial products, esp. for business intelligence