Interoperability in eGovernment through Cross-Ontology Semantic Web Service Composition

Table of Contents

1 Introduction

1.1 Motivation

1.2 Goals and Scope

1.3 Overview

2 eGovernment

2.1 Fields of eGovernment

2.2 eAdministration

2.3 Process Integration

2.4 Semantic Web meets eGovernment

2.5 eGovernment Scenario

2.6 From eGovernment to eGovernance

3 State-of-the-art

3.1 Overview

3.2 Interoperability

3.3 Web Services

3.4 Web Service Composition

3.5 Semantic Web Services

3.6 Semantic Information Integration

3.7 Related Work

4 Concept

4.1 Overview

4.2 Requirements

4.3 General Idea

4.4 Overall View

4.5 Domain Ontologies and Semantic Web Services

4.6 Semantic Bridges

4.7 Matching and Data Flow

4.8 Process Execution

4.9 Logical Architecture

5 Realization

5.1 Overview

5.2 System Architecture for Composition Design

5.3 Semantic Web Services

5.4 Semantic Bridges

5.5 Semantic Web Service Composer

5.6 System Architecture for Composition Execution

5.7 Execution Engine

5.8 Scenario

5.9 Validation and Verification

5.10 Usage

6 Evaluation

6.1 Coverage of Goals

6.2 Network Effect

7 Conclusion and Outlook

7.1 Summary

7.2 Open Problems

7.3 Future Work

Objectives and Topics

This thesis addresses the challenge of achieving interoperability in eGovernment process integration. It proposes a semi-automated approach for designing and executing data flows within the composition of semantically described Web services, utilizing different ontologies and information representations.

• Interoperability challenges in eGovernment process integration
• Application of Semantic Web technologies for service composition
• Rule-based mechanism for cross-ontology mediation
• Prototype development for automated data flow design
• Evaluation of architectural concepts in eGovernment scenarios

Excerpt from the Book

Summary of Chapters

1 Introduction: This chapter introduces the motivation for the thesis, outlining the interoperability challenges in eGovernment and defining the research goals.

2 eGovernment: The chapter explores the eGovernment domain, its fields, interaction models, and the specific need for process integration.

3 State-of-the-art: It provides a background on existing technologies for interoperability, Web services, composition, and semantic information integration.

4 Concept: This section details the developed approach for cross-ontology semantic Web service composition, including the use of semantic bridges.

5 Realization: The chapter describes the technical implementation of the prototype, including the composer, the execution engine, and the validation scenario.

6 Evaluation: It analyzes to what extent the objectives set in the beginning have been met and discusses the network effect.

7 Conclusion and Outlook: The thesis summarizes the proposed approach, highlights open problems, and suggests directions for future work.

Keywords

eGovernment, Interoperability, Web Services, Semantic Web, Ontology, Web Service Composition, Data Flow, Mediation, Semantic Bridges, Process Integration, OWL-S, WSDL, XML Schema, Automated Reasoning, Prototype

Frequently Asked Questions

What is the primary focus of this work?

The thesis focuses on achieving interoperability in the eGovernment sector by addressing the complexity of process integration through semantic Web service composition.

Which key problem does the thesis address?

It addresses the issue of integrating processes across different public agencies that use different, heterogeneous data representations and ontologies.

What is the main objective of this research?

The goal is to provide a semi-automatic approach to design and execute data flows, allowing domain experts to compose Web services without needing extensive technical knowledge of all involved schemas.

What scientific methods are utilized?

The work utilizes Semantic Web technologies, including ontologies (OWL), semantic bridges (rules), and faceted classification, to mediate between different information representations.

What topics are covered in the main part?

The main part covers the conceptualization of cross-ontology composition, the development of a semantic Web service composer, and the realization of an execution engine for eGovernment scenarios.

Which keywords best describe this research?

Key terms include eGovernment, Semantic Web, Web Service Composition, Interoperability, Ontology, and Data Flow mediation.

How are semantic bridges used in this approach?

Semantic bridges act as rules that infer parameter mappings between different ontologies, allowing disparate systems to understand and exchange data.

What role does the prototype play?

The prototype serves as a validation mechanism to demonstrate the feasibility of the concept in a cross-domain birth certificate application scenario.

How does this work differ from traditional integration?

Instead of manual, hard-coded transformations, this approach lifts data models to an ontological level, making integration more flexible and reusable.