Comparison of Amos II with Other Data Integration Projects

This working document gives an overview of some research projects whose aims are similar to the Amos II project. Amos II is related to research in the areas of OO views, data integration, distributed databases and general query processing. We have surveyed the literature on a number of multi-database integration and OO view projects and compared their approaches to Amos II . 1 Multi-database integration The main purpose of Amos II project is development of a system for integration of data in multiple data sources. This section compares the architecture and implementation techniques used in Amos II with other multi-database integration projects [6, 22, 4, 20, 7, 45, 34, 25, 4, 28, 16]. In summary, the unique features of Amos II are: To aid the comparison, we rst summarize some major features of the Amos II data integration capabilities: A distributed mediator architecture where query plans are generated using a distributed compilation in several communicating mediator and wrapper servers. Data integration by reconciled OO views spanning over multiple mediators and speci ed through declarative OO queries. These views are capacity augmenting views, i.e. locally stored attributes can be associated with them. Processing and optimization of queries to the reconciled views using OO concepts such as overloading, late binding, and type aware query rewrites.