Protg2000: A Flexible and Extensible OntologyEditing Environment

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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

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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

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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

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Building knowledge basesThe Protégé methodology
Protégé
Domain ontology to provide domain of discourse
Knowledge-acquisition tool for entry of detailed
content
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Protégé-2000 Ontology Editor
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Editing Attributes of Concepts
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Knowledge entry into forms
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Protégé-2000 plugin architecture
Knowledge model
Storage model
User interface
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Protégé-200 plugins

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

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UMLS tab knowledge-acquisition from remote
sources
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UMLS tab
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UMLS tab using metaclasses
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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

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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

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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

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