The Information manifold An implemented data integration system Goal: provide a uniform query interface to a heterogeneous collection of Web data sources Main contribution: the way it described the contents of the data sources it knew about IM contains declarative descriptions of the contents and capabilities of the information sources. Source Description)The Information Manifold ◼ An implemented data integration system ◼ Goal: provide a uniform query interface to a heterogeneous collection of Web data sources ◼ Main contribution: the way it described the contents of the data sources it knew about. ◼ IM contains declarative descriptions of the contents and capabilities of the information sources. (Source Description)