In this paper,we introduce a concept of Annotation Based Query Answer,and a method for its computation,which can answer queries on relational databases that may
Recently,peer-to-peer (P2P) search technique has become popular in the Web as an altative to centralized search due to its high scalability and low deployment-c
New challenges including how to share information on heterogeneous devices appear in data-intensive pervasive computing environments.Data integration is a pract