Advertising services in the Internet marketplace

The Internet now makes it possible for people to build complex applications by combining data and processing offered by different information systems (services) available across the network. These services normally have very diverse data structure and processing capabilities. Query processing in this kind of environment is a difficult problem due to the wide range of capabilities of the services. We believe to have a proper way to describe the structure, functionalities, and capabilities of the services is the first step towards generating feasible and efficient query plan(s) for the underlying service to process. We propose a framework for service description