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Table of contents

The Web Ontology Language

The Semantic Web

Web identifiers: URIs

From Links to Assertions

RDF Graphs

RDF Syntax

RDF Inference

From Facts to Taxonomies

RDF Schema

From Taxonomies to Ontologies

What is an Ontology?

What is an Ontology? II

Desiderata for a Web Ontology Language

Two varieties of OWL

Class Expression Constructors

Class Axioms

Property Axioms

Facts

Ontology Headers

Multiple Ontologies: owl:imports

Metamodeling

Metamodeling II

Difficulties with OWL Full

OWL DL

Description Logics

Traditional Semantics

Annotation Properties

Difficulties with OWL DL

Problems with OWL

SWRL (neƩ OWL Rules)