FUZZY ONTOLOGY

Building a fuzzy ontology plugin for Protégé

Introduction to Protégé

Free software for the creation of models and aplications using ontologies

Developed by Stanford University and Mark Musen

Enables the creation of ontologies for Semantic Web in the W3C OWL language

Ontology basics

Description of concepts and relations that exist between them, used by one or more agents.

“A formal and explicit specification of a shared conceptualisation.”

Basic components

Classes - organized in a hierachy Relations - types of interactions

Axioms - model true statements Instances - specific elements Domain - limits of an ontology Vocabulary - classes and instances

Protégé architecture GUI for manipulation of the

knowledge base Rich set of structures for modeling

knowledge in various presentations formats

Can be expanded by Java API plug-ins

PAL – internal axiomatic language for the consrtuction of output forms

Architecture schematic

Source code

 Protégé 4.0http://protege.stanford.edu/download/protege/4.0/zip/?C=N;O=D

graphVizhttp://www.graphviz.org/Download.php

Creating an ontology

Creating a class

Object properties

Creating relations

Creating instances

Searching the code

Protégé architecture, documentation and code repositories http://protege.stanford.edu/

Problems with compatibility of versions Protégé 3.2, Protégé 3.4 e Protégé 4.0

Types of plugins T - Tab Widget plug-ins S - Slot Widget plug-ins P - Project plug-ins I - Resource Display plug-ins F - Resource Action plug-ins O - Ontology Test plug-ins R - Result Panel plug-ins C - Conditions Widget Extensio plug-ins

Location of plugins

Usefull resourcess Protégé source

http://protege.stanford.edu/download/registered.html Protégé repository

http://smi-protege.stanford.edu/repos/protege Development guide with examples

http://protege.stanford.edu/plugins/owl/api/guide.html#Overview

Class inheritance by plugin typehttp://protege.stanford.edu/doc/dev.html#plugins

JAVA helphttp://wso2.org/project/wsas/java/1.1/docs/setting-java-home.html

Modifying XML Rename the file XML in folder XML to

plugin.xml. Add the folowing code into file

Configuring Eclipse Verify SubClipse is installed Add Protégé repository to Eclipse Select the file trunk from

protege4/protege-standalone/ Create new Java Project Add all JAR files from subfolders lib and

osgi/equinox into subfolder src in the plugin folder

Select file build.xml and execute “run as...” “Ant Build”

Required Métodos

initialiseClassView() - creates vizualisations

updateView() - selects classes. disposeView() - removes

visualisations getOWLModelManager() - accesses ontologies and events

getOWLWorkspace() - returns interface

Plugin example Select the Protégé instalation folder

as workspace Add all JAR files with class packages Create and configure the compiler

output Create a Java class with required

methods Execute program

Errors and problems

Solution Create a workspace in the Protégé

instalation file Import all Protégé source code files into

the project Add all possible libraries and

extensions into the Protégé instalation file

Configure the complier as before Configure a JAVA_HOME as described in

Java help

Result

References GRUBER, T. R. A Translation Approach to Portable Ontology Specifications.

Knowledge Acquisition, v. 5, n. 2, p. 199-220, 1993. YAGUINUMA, C. A.; BIAJIZ, M.; SANTOS, M. T. P. Sistema FOQuE para

Expansão Semântica de Consultas Baseada em Ontologias Difusas. In: XXII Simpósio Brasileiro de Banco de Dados, 2007, João Pessoa (PB). XXII Simpósio Brasileiro de Banco de Dados. João Pessoa (PB): SBC, 2007. v. 1. p. 208-222.

STANFORD UNIVERSITY. The Protégé Ontology Editor and Knowledge Acquisition System. Disponível em: <http://protege.stanford/>. Acesso em: 03 ago. 2009.

SEMPREBOM, T; CAMADA, M; MENDONÇA, I. Protégé e Ontologias. Florianópolis, 17 jul. 2007. Disponível em: <http://www.das.ufsc.br/~gb/pg-ia/Protege07/ontologia_protege.pdf>. Acesso em: 03 ago. 2009. 26 p.

MIMWIKI. Utilização do Protégé para Definição de Ontologias Médicas. Disponível em: <http://mimwiki.med.up.pt/index.php/Utiliza%C3%A7%C3%A3o_do_Prot%C3%A9g%C3%A9_para_defini%C3%A7%C3%A3o_de_ontologias_m%C3%A9dicas>. Acesso em: 03 ago. 2009.

WIKIPEDIA.ORG. Ontologia (Ciência da Computação). Disponível em: < http://pt.wikipedia.org/wiki/Ontologia_(ci%C3%AAncia_da_computa%C3%A7%C3%A3o)>. Acesso em: 03 ago. 2009.