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OWL2.0

Overview of OWL 2.0
PIAO GUANGYUAN
-2010.04.27

PIAO GUANGYUAN
OWL2.0

Contents

1. Introduction

2. Overview of OWL 2.0
3. Q&A

PIAO GUANGYUAN

2
OWL2.0

Introduction
 OWL
The OWL(Web Ontology Language) is designed for use by applications
that need to process the content of information instead of just
presenting information to humans.

OWL

OWL 2

Web Ontology Working Group
10 February 2004.

Web Ontology Working Group
10 October 2009.

PIAO GUANGYUAN

3
OWL2.0

Introduction
Core Specification

For User

Specification

Structural Specification &
Functional-Style Syntax

Document Overview

Profiles

Mapping to RDF Graphs

OWL 2 Primer

XML Serialization

Direct Semantics

OWL 2 New Features
& Rationale

Manchester Syntax

RDF-Based Semantics

OWL 2 Quick Reference
Guide

Conformance
PIAO GUANGYUAN

4
OWL2.0

Introduction
 What’s the differences?

OWL1

keys;
property chains;
richer datatypes, data ranges;
qualified cardinality restrictions;
asymmetric, reflexive, and disjoint properties;
enhanced annotation capabilities

PIAO GUANGYUAN

OWL 2.0

5
OWL2.0

Contents

1. Introduction
2. Overview of OWL 2

3. Q&A

PIAO GUANGYUAN

6
OWL2.0

Overview

PIAO GUANGYUAN

7
OWL2.0

Overview
 Ontologies
 Defined in the OWL 2 Structural Specification document.
 Any OWL 2 ontology can also be viewed as an RDF graph.
The relationship between these two views is specified by the
Mapping to RDF Graphs document.

PIAO GUANGYUAN

8
OWL2.0

Overview
 Syntaxes

PIAO GUANGYUAN

9
OWL2.0

Overview
 Semantics.
The Direct Semantics and the RDF-Based Semantics provide two
alternative ways of assigning meaning to OWL 2 ontologies:
Direct Semantics
assigns meaning directly to ontology structures

RDF-Based Semantics
assigns meaning directly to RDF graphs and so indirectly to ontology structures via the
Mapping to RDF graphs

PIAO GUANGYUAN

10
OWL2.0

Overview
 Profiles
OWL 2 EL
Suitable for applications where very large ontologies are needed.

OWL 2 QL
Suitable for applications where relatively lightweight ontologies are used to organize
large numbers of individuals and where it is useful or necessary to access the data
directly via relational queries.

OWL 2 RL
Suitable for applications where relatively lightweight ontologies are used to organize
large number of individuals and where it is useful or necessary to operate directly on
data in the form of RDF triples.
PIAO GUANGYUAN

11
OWL2.0

Q&A
PIAO GUANGYUAN

12

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Owl 2.0 Overview

  • 1. OWL2.0 Overview of OWL 2.0 PIAO GUANGYUAN -2010.04.27 PIAO GUANGYUAN
  • 2. OWL2.0 Contents 1. Introduction 2. Overview of OWL 2.0 3. Q&A PIAO GUANGYUAN 2
  • 3. OWL2.0 Introduction  OWL The OWL(Web Ontology Language) is designed for use by applications that need to process the content of information instead of just presenting information to humans. OWL OWL 2 Web Ontology Working Group 10 February 2004. Web Ontology Working Group 10 October 2009. PIAO GUANGYUAN 3
  • 4. OWL2.0 Introduction Core Specification For User Specification Structural Specification & Functional-Style Syntax Document Overview Profiles Mapping to RDF Graphs OWL 2 Primer XML Serialization Direct Semantics OWL 2 New Features & Rationale Manchester Syntax RDF-Based Semantics OWL 2 Quick Reference Guide Conformance PIAO GUANGYUAN 4
  • 5. OWL2.0 Introduction  What’s the differences? OWL1 keys; property chains; richer datatypes, data ranges; qualified cardinality restrictions; asymmetric, reflexive, and disjoint properties; enhanced annotation capabilities PIAO GUANGYUAN OWL 2.0 5
  • 6. OWL2.0 Contents 1. Introduction 2. Overview of OWL 2 3. Q&A PIAO GUANGYUAN 6
  • 8. OWL2.0 Overview  Ontologies  Defined in the OWL 2 Structural Specification document.  Any OWL 2 ontology can also be viewed as an RDF graph. The relationship between these two views is specified by the Mapping to RDF Graphs document. PIAO GUANGYUAN 8
  • 10. OWL2.0 Overview  Semantics. The Direct Semantics and the RDF-Based Semantics provide two alternative ways of assigning meaning to OWL 2 ontologies: Direct Semantics assigns meaning directly to ontology structures RDF-Based Semantics assigns meaning directly to RDF graphs and so indirectly to ontology structures via the Mapping to RDF graphs PIAO GUANGYUAN 10
  • 11. OWL2.0 Overview  Profiles OWL 2 EL Suitable for applications where very large ontologies are needed. OWL 2 QL Suitable for applications where relatively lightweight ontologies are used to organize large numbers of individuals and where it is useful or necessary to access the data directly via relational queries. OWL 2 RL Suitable for applications where relatively lightweight ontologies are used to organize large number of individuals and where it is useful or necessary to operate directly on data in the form of RDF triples. PIAO GUANGYUAN 11