Visions of 21st century information systems show highly specialized digital services and resources, which interact continuously and with a global reach. Especially with the emergence of technologies, such as the semantic web or software agents, intelligent services within these settings can be...

The Internet of Services is a term used to describe open global computing infrastructures in which an increasing number of services is made available to users through the Internet. Due to the openness, from the users point, the quality of the services o ffered can vary a lot and users have to...