Towards More Flexible Schema Management in Object Bases

There exists a current trend in database technology to make databases more extensible and exible, or even to generate databases for speci c customer needs. So far, schema management and especially schema evolution have been excluded from this trend. In this paper, we propose a new approach to schema management and topics centered around it, like schema consistency and schema evolution. This approach allows easy tailoring of schema management, high-level speci cation of schema consistency and development of advanced tools supporting the user during schema evolution.