Integrated Query of Multi-resources Information in the way of SaaS Application

The thesis researches and analyzes the ways of information query from the model of SaaS (Software-as-a-service) in cloud computing frame to establish a common data model by using XML. It puts forward a frame of integrated query of multi-resources information by the way of SaaS application by connecting the query of heterogeneous data in the way of the middleware and combining the method of interface software with the method of gathering database metadata during cross search. The model will facilitate querying effectively and utilizing fully rich information resources in the field of information query for users; effectively reduce the costs of users without maintaining and managing; promote the integration of social resources and produce the beneficial result of the scale economy.