Abstract

Versioning has been one of the important requirements for engineering design databases and is of increasing interest to database system designers. While there exist many object-oriented DBMS’s that support various versioning facilities, these systems consider the versioning problems as two separate domains: object versioning and schema versioning. In this paper, we consider both domains together and propose a unifying version model for both objects and schema. In particular, we present how we unify version controls for schema and objects, and describe issues in implementation.

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