A Global Object Model for AccommodatingInstance
نویسندگان
چکیده
To completely address database integration problems in the context of multidatabase and data warehousing systems, one has to examine various integration and query requirements. In this paper, we identify three phases of database integration, i.e. analysis, derivation, and evolution. Due to poor data quality in local databases and local database updates, some unresolved instance connicts have to be accommodated by the integrated databases. We have therefore proposed a new global object model to accommodate instance connicts and to provide query support on the data containing instance connicts throughout the derivation and evolution phases of database integration. The new global object model, known as OO RA , has been designed to allow database integrators and end users to query both the local and resolved instance values using the same query language.
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