A relational model of data for large shared data banks
Communications of the ACM
Properties and update semantics of consistent views
ACM Transactions on Database Systems (TODS)
On the correct translation of update operations on relational views
ACM Transactions on Database Systems (TODS)
Correctness of query execution strategies in distributed databases
ACM Transactions on Database Systems (TODS)
Data abstractions for database systems
ACM Transactions on Database Systems (TODS)
A Relational Database View Update Translation Mechanism
VLDB '84 Proceedings of the 10th International Conference on Very Large Data Bases
Multiple view support within the ANSI/SPARC framework
VLDB '77 Proceedings of the third international conference on Very large data bases - Volume 3
A software engineering view of data base systems
VLDB '78 Proceedings of the fourth international conference on Very Large Data Bases - Volume 4
Issues in distributed data base management systems: a technical overview
VLDB '78 Proceedings of the fourth international conference on Very Large Data Bases - Volume 4
On the updatability of relational views
VLDB '78 Proceedings of the fourth international conference on Very Large Data Bases - Volume 4
Algebraic specification schemes for data base systems
VLDB '78 Proceedings of the fourth international conference on Very Large Data Bases - Volume 4
VLDB '78 Proceedings of the fourth international conference on Very Large Data Bases - Volume 4
An Algebraic Framework for Schema Matching
Informatica
AQL: a problem-solving query language for relational data bases
IBM Journal of Research and Development
An algebraic framework for schema matching
WAIM'05 Proceedings of the 6th international conference on Advances in Web-Age Information Management
Method for data models integration in the common paradigm
ADBIS'97 Proceedings of the First East-European conference on Advances in Databases and Information systems
An overview of recent data base research
ACM SIGMIS Database
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The purpose of this paper is to analyze the problem of mapping between different levels of a data base.A data Base is viewed as an Abstract Object upon which it is possible to operate with a given set of operations, the result of which depends both on the "type" of the object and on its state.Following this approach and utilizing some algebraic formalism we analyze the mappings between external views of a data base and the conceptual view of the data base itself. The main result is a requirement on the consistency between the process of deriving an external view from the conceptual view and the translation of external (user) operations into conceptual operations.It is also shown that this requirement is not sufficient to characterize the "interference" arising from a shared use of a Data Base.Informal and formal examples illustrating these concepts are given.