: The number of information sources in the Web is growing day by day with a tremendous speed. At the same time, users tend to manage more and more tasks electronically, thereby using publicly available information sources. Since the Web is an open, distributed and dynamic environment, in which information sources are offered and controlled autonomously and independently, the interoperability of available information is still a big challenge. In this paper, we present a process-based approach for integrating various information sources and illustrate our approach by an example. Our approach also allows dynamic and flexible integration of information sources provided by the users.