Mobile computing is one of the recent growing fields in the area of wireless networking. The recent standardization efforts accomplished in Web services, with their XML-based formats for registration/discovery, service description, and service access, respectively UDDI, WSDL, and SOAP, certainly represent an interesting first step towards open service composition, which MA supports for mobile c...

This paper describes a proposed system for competency-based just-in-time learning that uses competency ontologies and semantic web services to deliver learning objects to learners in a corporate environment. A competency ontology is a rich, semantic description of the competencies an employee must possess in order to participate in specific activities of the business processes of a company. Sem...

Matching descriptions of user requirements against descriptions of service capabilities is crucial for the discovery of appropriate services for a given task. To improve the precision of approaches that consider only syntactical aspects of matchmaking (e.g. UDDI) several approaches for semantic matchmaking have been proposed. We compare two approaches with respect to their potentials for matchm...

A key factor for success of companies operating in a globalized market environment is a modern SOA-based infrastructure. An essential component of a SOA infrastructure is the central service registry. Current standards for organizing service registries and their implementations are driven by the technical aspects of the infrastructure. When using such technically organized service registries, b...

Web Services fall under the so-called emerging technologies category and are getting more and more used for Internet applications or business transactions. Currently, there is an important need for validation techniques of web service based architectures. Web services, that are currently proposed into UDDI registries, are not always tested. And for most of them, no specification is provided. So...

This paper proposes the concept of business events as the cornerstone to web service description and coordination. First, a web service architecture is introduced as the result of an event based analysis & design phase. Then, it is advocated how the event concept can be used for semantically rich web service description. A distinction is made between two web service interfaces: a non-transactio...

The importance of semantic based web services has been widely recognized and accepted by the industry and academic research. In this paper, we first motivate the demand for semantic based distributed production configuration taking place in the supply chain under B2B situation, then propose a solution for the configuration system, in which we apply the DAML+OIL Language to describe multi-layere...

We present a prototype, called DaWeS, which is a Data Warehouse fed with Web Services. The main feature of DaWeS is to use a mediation approach (data integration without materialization) as the ETL tool (data extraction, transformation and loading). This approach enables to automate many steps of the ETL process, while facilitating human interventions by exclusively relying on declarative langu...

Web services have acquired enormous popularity among software developers. This popularity has motivated developers to publish a large number of Web service descriptions in UDDI registries. Although these registries provide search facilities, they are still rather difficult to use and often require service consumers to spend too much time manually browsing and selecting service descriptions. Thi...

1 SAPIENZA – Università di Roma, Dipartimento di Informatica e Sistemistica {baldoni,mecella}@dis.uniroma1.it 2 CNIPA Centro Nazionale per l’Informatica nella Pubblica Amministrazione {s.fuligni,f.tortorelli}@cnipa.it Abstract. The paper describes the currently ongoing effort for defining and developing a nationwide e-Government Service Oriented Architecture, in order to guarantee a flexible ap...