Protégé-2000: A Flexible and Extensible Ontology-Editing

Environment

Natalya F. Noy, Monica Crubézy,

Ray W. Fergerson, John H. Gennari,

William E. Grosso, Mark A. Musen

Stanford Medical Informatics

Stanford University

Protégé-2000

Supports modeling of ontologies and use of ontologies to guide acquisition of content knowledge from domain experts

Allows developers to “plug in” new components easily to add new functionality

Protégé-2000

Knowledge model Frame-based OKBC compatible

Features Editors for browsing, building and maintaining

knowledge bases (KBs) API for programmatic access to the KB Extensible GUI (via Java beans) Multiple output formats for archival storage

Protégé

Domain ontologyto provide domainof discourse

Knowledge-acquisition toolfor entry of detailed content

Building knowledge bases:The Protégé methodology

Protégé-2000 Ontology Editor

Editing Attributes of Concepts

Knowledge entry into forms

Protégé-2000 plugin architecture

Knowledgemodel

Storagemodel

Userinterface

Protégé-200 plugins

Domain-specific user-interface plugins Alternative back ends for archival storage Utility programs for knowledge-acquisition

tasks End-user applications

UMLS tab: knowledge-acquisition from remote sources

UMLS tab

UMLS tab: using metaclasses

Resource Description Framework

A standard under development by the World-Wide Web Consortium to encode rich “metadata” within Web pages

Designed for use by future e-commerce applications

RDF provides a meta-ontology and an ontology language and with XML-based syntax

RDF support in Protégé-2000

Reads and writes ontologies as RDF-schema documents knowledge-base instances as RDF files

Currently supports RDF semantics compatible with those of OKBC

Handles creation and parsing of RDF syntax completely transparently

Summary

Protégé provides: An extensible knowledge-base development

environment A methodology for building knowledge-based

solutions A clear specification of its representational

semantics A variety of persistent storage options

http://smi.stanford.edu/projects/protege