Determining the correspondences among heterogeneous data sources, which is critical to
integration of the data sources, is a complex and resource-consuming task that demands …

Currently, database management systems solely rely on exact syntax of queries to retrieve
data. As consequence query answers often do not meet the user's intention. In this thesis we …

By integrating design schemes, we conciliate several designs of the same real world done
concurrently. These designs provide structural and semantic knowledge. To take into …