title: capturing both types and constraints in data integration juliana freire , rajeev rastogi , michael benedikt , wenfei fan , chee yong chan 2003. authors: nan. venue: sigmod conference. year: nan
title: the role of integrity constraints in database interoperation very large data bases. authors: mark w. w. vermeer , peter m. g. apers. venue: nan. year: 1996.0