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We present a general model for classiication structures that supports object role modelling. Objects can be associated with many roles simultaneously in a way that provides multiple clas-siication views over objects. Further, objects can change their roles through migration within a classiication graph. Object migration is controlled through the structure(More)
We present a general model of database connectivity for the controlled sharing and migration of information across databases as supported in the object-oriented database management system OMS Connect. A database may connect to one or more other databases, thereby enabling remote data to be viewed, processed and copied within the local database in such a way(More)
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