Mick Kerrigan

A qos-aware selection model for semantic web services

Automating Service Oriented Architectures by augmenting them with semantics will form the basis of the next generation of computing. Selection of service still is an important challenge, especially, when a set of services fulfilling users capabilities requirements have been discovered, among these services which one will be eventually invoked by user is very critical, generally depending on a combined evaluation of qualities of services (Qos). This paper proposes a QoS-based selection of services. Initially we specify a QoS ontology and its vocabulary using the Web Services Modeling Ontology (WSMO) for annotating service descriptions with QoS data. We continue by defining quality attributes and their respective measurements along with a QoS selection model. Finally, we present a fair and dynamic selection mechanism, using an optimum normalization algorithm.

Semantically-enabled Service Oriented Architecture : Concepts, Technology and Application

Semantically enabled service-oriented architecture focused on principles of service orientation, semantic modeling, intelligent and automated integration defines grounds for a cutting-edge technology which enables new means to integration of services, more adaptive to changes in business requirements which occur over systems’ lifetime. We define the architecture starting from a global perspective and through Web service modeling ontology as its semantic service model we narrow down to its services, processes and technology we use for the reference implementation. On a B2B integration scenario we demonstrate several aspects of the architecture and further describe the evaluation of the implementation according to a community-agreed standard evaluation methodology for semantic-based systems.

The Web Service Modeling Toolkit - An Integrated Development Environment for Semantic Web Services

The time of engineers is a precious commodity. This is especially true for engineers of semantic descriptions, who need to be highly skilled in conceptual modeling, a skill which will be in high demand as Semantic Web technologies are adopted by industry. Within the software engineering community Integrated Development Environments (IDEs) like the Eclipse Java Development Toolkit and NetBeans have proved to increase the productivity of engineers by bringing together tools to help engineers with their everyday tasks. This paper motivates the need for such an IDE for the Semantic Web and in particular describes the Web Service Modeling Toolkit (WSMT), an Integrated Development Environment for Semantic Web Services through the WSMO paradigm.

SEEMP: An Semantic Interoperability Infrastructure for e-Government Services in the Employment Sector

This paper presents SEEMP, a marketplace to coordinate and integrate public and private employment services (ESs) around the EU Member States. The need for flexible collaboration in the marketplace gives rise to the issue of interoperability in both data exchange and share of services. SEEMP proposes a mixed approach that relies on the concepts of services and semantics. SEEMP approach combines Software Engineering and Semantic Web methodologies/tools in an infrastructure that allows for a meaningful service-based communication among ESs.

Modeling Semantic Web Services with the Web Service Modeling Toolkit

The lack of any methodology for modeling Semantic Web Services means that developers wishing to utilize technologies like the Web Service Modeling Ontology, the Web Service Modeling Language, and the Web Service Execution Environment are lost in a Semantic wilderness with no road signs to guide them on their way. This paper presents an initial guide for developers wishing to model Semantic Web Services, along with a description of the Web Service Modeling Toolkit that provides tool support for the activities that must be conducted by the developer in this process.

The web service modeling toolkit

The development of software is not an easy task and the availability of adequate tool support is an important step towards reducing the effort that a developer must put into the Software Development Cycle. As an emerging technology, it is vital that Semantic Web Services can be quickly and easily created by developers to ensure that this new technology can be easily adopted. In this demo the process of developing Semantic Web Service descriptions, through the WSMO paradigm, using the Web Service Modeling Toolkit (WSMT) will be presented.

A semantically enabled service oriented architecture

The researchers in DERI Innsbruck have been building an execution infrastructure for the Semantic Web Services (SWS) based on the Services Oriented Architecture (SOA) paradigm of loosely coupled components. While SOA is widely acknowledged for its potential to revolutionize the world of computing, that success depends on resolving several fundamental challenges, and especially in the case of open SOA environment the existing specifications do not address several issues. We aim in DERI Innsbruck to define a skeleton of the SWS system and implement the overall infrastructure with the aim of automating service discovery, negotiation, adaptation, composition, invocation, and monitoring as well as service interaction requiring data, protocol, and process mediation. We call this infrastructure a Semantically Enabled Service oriented Architecture (SESA). While there are already several specifications in the space for Web Services there are still elements missing, for example there is no specification describing how the particular components/services of the SWS infrastructure would work together. That work is carried out by DERI researchers in standardization bodies such as OASIS and W3C. In the near future a service-oriented world will consist of an uncountable number of services. Computation will involve services searching for services based on functional and non-functional requirements and an interoperating with those that they select. Services will not be able to interact automatically and SOAs will not scale without signification mechanization of a fixed set of components/services. Hence, machine processable semantics are critical for the next generation of computing, services and SOAs, to reach their full potential. The contribution of DERI Innsbruck is to define and implement the fixed set of services of an infrastructure that must be provided to enable a dynamic discovery, selection, mediation, invocation and inter-operation of the Semantic Web Services to facilitate the SOA revolution towards open environments. We recognize in DERI Innsburck that SOA outside of tightly controlled environment cannot succeed until/unless the semantics issues are addressed. Only with semantics can critical subtasks can be automated leaving humans to focus on higher level problems.

Goal-based visualization and browsing for semantic web services

We present a goal-based approach for visualizing and browsing the search space of available Web services. A goal describes an objective that a client wants to solve by using Web services, abstracting from the technical details. Our visualization technique is based on a graph structure that organizes goal templates - i.e. generic and reusable objective descriptions - with respect to their semantic similarity, and keeps the relevant knowledge on the available Web services for solving them. This graph is generated automatically from the results of semantically enabled Web service discovery. In contrast to existing tools that categorize the available Web services on the basis of certain description elements, our tool allows clients to browse available Web services on the level of problems that can be solved by them and therewith to better understand the structure as well as the available resources in a domain. This paper explains the theoretic foundations of the approach and presents the prototypical implementation within the Web Service Modeling Toolkit WSMT, an Integrated Development Environment for Semantic Web services.

SEEMP: A Networked Marketplace for Employment Services

Human capital is more and more the key factor of economic growth and competitiveness in the information age and knowledge economy. But due to a still fragmented employment market compounded by the enlargement of the EU, the human resources are not effectively exchanged and deployed. The business innovation of SEEMP1 develops a vision of an Employment Mediation Marketplace (EMM) for market transparency and effic ient mediation. Its technological innovation provides a federated marketplace of employment agencies through a peer-to-peer network of employment data and mediation services. In other words, the solution under development is a de-fragmentation of the employment market by a web-based collaborative network. The SEEMP-enabled employment marketplace will strengthen the social organization of public employment administration, maximize the business turnover of private employment agencies, improve citizens’ productivity and welfare, and increase the competitiveness and performance of business.

Semantic Web Services architecture with lightweight descriptions of services

Abstract The goal of semantic Web services research and development is to introduce semantics for service descriptions and to enable an automation for various tasks of a service integration process. Recent developments in semantic Web services aim to introduce bottom‐up approach to service modeling allowing to build incremental layers on top of existing service descriptions while at the same time enhance existing SOA technologies. An important step in this direction has been made in the W3C by the SAWSDL WG proposing a framework for annotating WSDL services with arbitrary semantic descriptions. In this chapter, we show how lightweight semantic service model called WSMO‐Lite can build on top of SAWSDL and how such service model can be used for various tasks within the service integration process in a semantic Web services architecture and its service technology. Ultimately, our goal is to allow incremental steps on top of existing service descriptions, enhancing existing SOA capabilities with intelligent and automated integration.