The focus of this paper is to devise a service-oriented architecture for multi-agents system (called SAM), to reach a wide adoption and routine use of agents, web services, and semantic web technologies. In order to better integrate agents, web applications and information sources in an open and distributed environment such as the Internet, a service matchmaker called middle agent is responsibl...

In the year 2003 the administration portal for Switzerland, the Virtual Desk www.ch.ch, went live. This portal is based on a powerful meta-database of all available resources and services of the federation, the cantons and the districts and allocates a unique name, the URN (Uniform Resource Name), to every resource. The URN:Technology, adapted to the requirements of www.ch.ch, became an open st...

This paper proposes an approach to behaviour-based discovery of Web Services by which business rules that govern service behaviour are described as a policy. The policy is represented in the form of ontological information and is based on actions relating to the service and conditions for performing them. The standard WS-Policy is used to associate such a policy to the Web Service. With a frame...

Web services have become a main thrust of the IT industry and there has been considerable development in this area. There are two almost universally accepted standards: SOAP (Simple Object Access Protocol) for invoking services and WSDL (Web Services Description Language) for describing the technical specifications of the services. There are well-established service registries like UDDI (Univer...

As a popular registry for Web services, UDDI provides a mature mechanism for service registration and search, but it does not support semantic operations on Web services, so its service discovery capability is not satisfactory. OWL-S overcomes UDDI’s shortcomings. Using OWL-S, service advertisements and requests based on capability description could be built in a uniform way, and the semantic m...

Semantic Web Services are the key technology providing services for the users’ convenience in the semantic web environment. Many companies in various fields are researching and developing languages for constructing Semantic Web Services such as DAML-S, WSDL, X-LANG and BPEL4WS. DAML-S is a method that accesses the existing Web Service method from a semantic web environment. However, the current...

Recently Web services have become a key technology which is indispensable for e-business due to its ability to provide the desired information or service regardless of time and place by integrating current application systems within a single business or between multiple businesses with standardized technologies using the open network and Internet. However, the current Web Services Retrieval Sys...

AbstrAct Web services form the core of e-business and hence, have experienced a rapid development in the past few years. This has led to a demand for a discovery mechanism for Web services. Discovery is the most important task in the Web service model because Web services are useless if they cannot be discovered. A large number of Web service discovery systems have been developed. Universal Des...

Nowadays Web Services are turning out to be more prevalent and permitting organizations to utilize the web as a business opportunity for offering their own services and using existing services from others. A Web service is a self-describing software component which is universally accessed by means of standard protocols. A web service registry UDDI provides interoperable, standards based approac...

Web services are interoperable components that can be used in application-integration and component-based application development. In so doing, the appropriate specification of Web services, as the basis for discovery and configuration, becomes a critical success factor. This paper analyses the UDDI specification framework, which is part of the emerging Web service architecture, and proposes a ...