Semantic Web Services for Web Databases

Abstract

In this chapter, we report on the implementation and experiments for our query infrastructure over Web services. The implementation is conducted in the context of WebDG, a digital government prototype that provides access to e-government databases and services related to social services. As a prototype, WebDG supports access to only few e-government services. Thus, it cannot represent the large number of Web services available on the Web. It is then necessary to asses our approach through experiments on synthetic data. The goal of these experiments is to measure the cost of the different algorithms and the quality of the service execution plans they generate. We focus on computing the time it takes each algorithm to reach a decision. The quality of their results is simply the objective function, F smr , as defined for a service execution plan in the previous chapter. These different results are then compared together under different scenarios and constraints.