Terminological Ontologies - Design, Management and Practical Applications

Preface

Acknowledgements

Contents

Chapter 1 Ontology basic concepts

1.1 Introduction

1.2 Ontology families

1.3 Ontology classification

1.3.1 Controlled vocabularies

1.3.2 Glossaries

1.3.3 Subject headings and taxonomies

1.3.4 Thesauri

1.3.5 Semantic Networks

1.3.6 Is-a Hierarchies and Formal Instances

1.3.7 Frame based ontologies

1.3.8 General Constraints and Disjointness

1.4 Alignment of ontologies and ontology mappings

1.5 Summary

Chapter 2 A representation framework for terminological ontologies

2.1 Introduction

2.2 Related work in the representation of terminological ontologies

2.2.1 Representation of knowledge models

2.2.2 Representation of mappings

2.3 Representation of terminological ontologies

2.3.1 Knowledge model representation

2.3.2 Metadata for ontology description

2.4 Representation of ontology mappings

2.4.1 Mapping representation

2.4.2 Metadata for mapping description

2.5 Case of study: Mapping of terminological ontologies to an upper level ontology

2.6 Summary

Chapter 3 Ontology learning for terminological ontologies

3.1 Introduction

3.2 Ontology learning from corpora

3.3 Ontology learning from dictionaries

3.4 Ontology learning from schemata

3.5 Ontology learning from thesauri

3.6 Cases of study

3.6.1 Transformation of heterogeneous thesaurus representations into terminological ontologies

3.6.1.1 Description of the method

Analysis of the source and target formats

Mapping between source and target model

Creation of the translation tool

Validation of the translated terminological ontology

Management of the translation tool

3.6.1.2 Testing the method

3.6.2 Terminological ontologies as a result of thesaurus merging

3.6.2.1 Proposed merging process

Harmonization of the interchange format

Extraction of clusters

Mapping & merging

Pruning of non-relevant clusters

Generation of a domain network of clusters

Generation of inter-cluster relations

Pruning of non-relevant relations

Generation of a new domain thematic thesaurus

3.6.2.2 Testing the method

Testing the method in the urban domain

Testing the method in the hydrological domain

3.7 Summary

Chapter 4 Formalization of terminological ontologies

4.1 Introduction

4.2 Current approaches towards formalization

4.3 Increase of formalism in terminological models

4.4 Application of the formalization process

4.5 Summary

Chapter 5 Access to terminological ontologies

5.1 Introduction

5.2 Terminological ontology management

5.3 Terminological ontology storage and access

5.3.1 Architecture

5.3.2 Terminological ontology repository

5.3.3 Terminological ontology manager

5.4 Edition of terminological ontologies

5.5 Accessing terminological ontologies through a web service

5.6 Performance analysis

5.7 Summary

Chapter 6 Applicability of terminological ontologies to information retrieval

6.1 Introduction

6.2 Resource classification

6.3 Improvement of information discovery through query expansion

6.3.1 State of the art in query expansion

6.3.2 A proposal for terminological based query expansion

6.3.2.1 General context

6.3.2.2 Proposed expansion model

6.3.3 Testing the retrieval model

6.4 Information browsing

6.4.1 State of the art in information browsing approaches

6.4.2 Topic map based browsing

6.4.3 Cluster based browsing

6.4.3.1 Selection of algorithms for hard and fuzzy clustering

6.4.3.2 Thematic clustering using the thesaurus structure

6.4.3.3 Thematic clustering using keywords as free text

6.4.4 Browsing methods comparison

6.4.4.1 Description of the metadata corpus

6.4.4.2 Topic map extraction

6.4.4.3 Application of clustering techniques

Thematic clustering using the thesaurus structure

6.4.4.4 Comparison of results

6.5 Summary

Chapter 7 Concluding remarks and outlook

References

Index