[1991] Proceedings. Seventh International Conference on Data Engineering
DOI: 10.1109/icde.1991.131503 View full text |Buy / Rent full text
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“…• Applied to objects, evolution constraints are referred to as transition constraints and usually rule the evolution of an object from being member of a class to being member of another class [22]. For example, an object in the Student class may migrate to become an object of the Faculty class or evolve to also become an object of the Alumnus class.…”
Section: Evolution Constraintsmentioning
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“…• Applied to objects, evolution constraints are referred to as transition constraints and usually rule the evolution of an object from being member of a class to being member of another class [22]. For example, an object in the Student class may migrate to become an object of the Faculty class or evolve to also become an object of the Alumnus class.…”
Section: Evolution Constraintsmentioning
“…Transition constraints [22,37] bear specific transition semantics. They have been introduced to model the phenomenon called object migration.…”
Section: Transitionmentioning
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“…For entities, we talk about object migration from one entity to another [17]. Transition constraints presuppose that migration happens in a fixed amount of time.…”
Section: Introductionmentioning
“…Object migration, where, say, John migrates from being an instance of Student to one of Alumnus, has received ample attention in the temporal database and conceptual modelling communities [1][2][3][4][5][6]. But how do we migrate, say, the ORM fact John, CS2000 ∈ EnrolledIn to John, CS2000 ∈ GraduatedIn when John has completed the degree programme CS2000 successfully?…”
Section: Introductionmentioning