Towards a theory of schema-mapping optimization
Ronald Fagin, Phokion G. Kolaitis, Alan Nash, Lucian Popa · 2008
A schema mapping is a high-level specification that describes the relationship between two database schemas. As schema mappings constitute the essential building blocks of data exchange and data integration, an extensive investigation of the foundations of schema mappings has been carried out in recent years. Even though several different aspects of schema mappings have been explored in considerable depth, the study of schema-mapping optimization remains largely uncharted territory to date.