The paper discusses an approach for facilitating the authoring process for Technology Enhanced Learning by providing service oriented access to learning materials based on their content. This service-oriented approach is based on Semantic Web Service technologies. It reflects current work in the frame of an ongoing Bulgarian research project SINUS “Semantic Technologies for Web Services and Tec...

This paper addresses an interface layer as an integral part of web service technologies that takes wellestablished web service specifications as a wrapper and accepts natural language specifications for the interapplication communication. In a growing complexity of web service networks the architecture of context becomes more and more an issue for both service providers and service requesters. ...

Collaborative Filtering (CF) is widely employed for making Web service recommendation. CF-based Web service recommendation aims to predict missing QoS (Quality-of-Service) values of Web services. Although several CF-based Web service QoS prediction methods have been proposed in recent years, the performance still needs significant improvement. Firstly, existing QoS prediction methods seldom con...

In dynamic Web service environments, the performance of the Internet is unpredictable; the reliability and effectiveness of remote Web services are also unclear. Therefore, it can hardly be guaranteed that the quality of Web service (QoWS) attributes of Web services do not fluctuate with the dynamic Web service environments. When a composite service is planned in the context of dynamic service ...

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...