USING CORRESPONDENCE ASSERTIONS TO SPECIFY THE SEMANTICS OF VIEWS IN AN OBJECT-RELATIONAL DATA WAREHOUSE
Valéria Magalhães Pequeno, Joaquim Nunes Aparício · 2005
Keywords: integrated information, object view, object-re lational model, data warehouseAbstract: An information integration system provides a uniform query interface for collecting of distributed and hetero-geneous, possiblyautonomous, informationsources,givinguserstheillusionthattheyinterrogateacentralizedand homogeneous information system. One approach that has been used for integrating data from multipledatabases consists in creating integrated views, which allows for queries to be made against them.Here, we propose the use of Correspondence Assertions (CAs) to formally specify the relationship betweenthe integrated view schema and the source database schemas. In this way, CAs are used to assert that thesemantic of some schema’s components are related to the semantic of some components of another schema.Our formalism has the advantages of proving a better understanding of the semantic of integrated view, and ofhelping to automate some aspects of data integration.