Web Service Discovery in the FUSION Semantic Registry

The UDDI specification was developed as an attempt to address the key challenge of effective Web service discovery and has become a widely adopted standard. However, the text-based indexing and search mechanism that UDDI registries offer does not suffice for expressing unambiguous and semantically rich representations of service capabilities, and cannot support the logic-based inference capacity required for facilitating automated service matchmaking. This paper provides an overview of the approach put forward in the FUSION project for overcoming this important limitation. Our solution combines SAWSDL-based service descriptions with service capability profiling based on OWL-DL, and automated matchmaking through DL reasoning in a semantically extended UDDI registry

Supporting Semantically Enhanced Web Service Discovery for Enterprise Application Integration

The availability of sophisticated Web service discovery mechanisms is an essential prerequisite for increasing the levels of efficiency and automation in EAI. In this chapter, we present an approach for developing service registries building on the UDDI standard and offering semantically-enhanced publication and discovery capabilities in order to overcome some of the known limitations of conventional service registries. The approach aspires to promote efficiency in EAI in a number of ways, but primarily by automating the task of evaluating service integrability on the basis of the input and output messages that are defined in the Web service’s interface. The presented solution combines the use of three technology standards to meet its objectives: OWL-DL, for modelling service characteristics and performing fine-grained service matchmaking via DL reasoning, SAWSDL, for creating semantically annotated descriptions of service interfaces, and UDDI, for storing and retrieving syntactic and semantic information about services and service providers

Discovery and Selection of Certified Web Services Through Registry-Based Testing and Verification

Reliability and trust are fundamental prerequisites for the establishment of functional relationships among peers in a Collaborative Networked Organisation (CNO), especially in the context of Virtual Enterprises where economic benefits can be directly at stake. This paper presents a novel approach towards effective service discovery and selection that is no longer based on informal, ambiguous and potentially unreliable service descriptions, but on formal specifications that can be used to verify and certify the actual Web service implementations. We propose the use of Stream X-machines (SXMs) as a powerful modelling formalism for constructing the behavioural specification of a Web service, for performing verification through the generation of exhaustive test cases, and for performing validation through animation or model checking during service selection

Advanced eGovernment Information Service Bus (eGov-Bus)

The eGov-Bus project provides citizens and businesses with improved access to virtual public services, which are based on existing national eGovernment Web services and which support cross-border life events. Requirements and specific rules of these life events are considered, and personalization of user preferences is supported. eGov-Bus is based on adaptable process management technologies, allowing for virtual services which are dynamically combined from existing national eGovernment services. In this way, a comprehensive workflow process is set up, allowing for service-level agreements, an audit trail and explanation of the process to the end user. The eGov-Bus process engine operates on top of a virtual repository, providing a high-level semantic view of information retrieved from heterogeneous information sources, such as eGovernment Web services. Further, eGov-Bus relies on a security framework to ensure all high-level security requirements are met. The eGov-Bus architecture is business oriented, it focuses on Service Oriented Architecture (SOA) concepts, asynchronously combining Web services and providing a Service Bus.Frameworks and Guidelines, eGovernment Ontologies, Admininistrative Process Design, Life Events, Web Services, Service Bus Integration

An XML-based continuous auditing web services model -An Implementation Study

The concepts of continuous auditing are now more than two decades old, many researchers have issued differ continuous audit system model for applying over internet technology. A continuous audit is an assurance service where the time between the occurrence of events underlying a particular subject matter and the issuance of an auditor‘s opinion on the fairness of a client‘s representation of the subject matter is eliminated. The auditor offer restricted views provided by the continuous audit web services (CAWS) routines on a fee basis to analysts, investors, financial institutions, and other parties interested in obtaining continuous audit (CA) of business performance or other audit objects of interest. In our study proposed not only discuss with how to ensure the integrity and effectiveness of the entire data collection system but also implement the XML web services to enterprise applied for correctness and usefulness well-known the CAWS model. The CAWS design and demonstrate an implementation of continuous audit with the internal auditor data verify for compliance CA domain. The demonstrated CAWS model uses data retrieval layer, data analysis layer and data presentation layer over the internet to continuously monitor by the audit department. The article concludes with suggestion for future research and our implemented experiences

WS-GUARD: enhancing UDDI Registries with on-line testing capabilities

Abstract This thesis investigates the Service Oriented Architecture and in particular the runtime discovery of Web services through the development of an empowered UDDI registry called WS-GUARD (Guaranteeing Uddi Audition at Registration and Discovery). We start by presenting the Audition framework, a specially conceived framework that applies the idea of testing during the Web service registration in the UDDI registry and then we study the practical implications of its implementation focusing on the most advanced Web service technologies. This thesis aims at modifying and extending the registration protocol of Web services into UDDI registries in order to introduce a testing phase before actual service publishing: only those services that pass the audition are admitted in the registry and become publicly available at runtime. A complete prototype implementation of WS-GUARD is described and analysed. Riassunto analitico La tesi ha investigato l'ambito Service Oriented Architecture e in particolare il run-time discovery di Web service attraverso la realizzazione di un registro UDDI potenziato, denominato WS-GUARD (Guaranteeing Uddi Audition at Registration and Discovery). Principale obiettivo del lavoro è stato la modifica dei protocolli di registrazione del registro UDDI. Tale modifica è stata rivolta all'introduzione di una fase di testing preventiva alla tradizionale fase di registrazione. Ammettendo alla registrazione soltanto quei servizi che superino la fase di verifica si intende fornire maggiori garanzie sulla qualità dei servizi che saranno resi dinamicamente reperibili (discovered) a tempo di esecuzione. La tesi discute le modifiche proposte e ne fornisce un'implementazione reale

QServ: Integrating Testing and Auditing into QoS Management of Web Services

In a web service environment, service requesters are able to locate functionally equivalent services dynamically making quality of service (QoS) the differentiating factor amongst the web services. Service providers need to formulate QoS aware services in order to remain competitive and to achieve the highest possible profit from their offerings. There are several quality attributes to consider in any operating environment and we’ve grouped these requirements into 5 major categories: Service Dependability, Architectural Flexibility, Operational Capability, Risk Exposure and Financial Accountability. In the web services environment the realization of the attributes in these quality categories has increased in complexity due to the distributed and dynamic nature of the environment. While much of the research, standards and specifications address these issues, to the knowledge of the authors, an end to end solution for managing the quality attributes in a web service environment that include both testing and auditing has not been proposed. This paper will describe some of the current research that has been conducted to address the various aspects of quality as well as introduce the design for an end-to-end solution that will include testing and auditing