From object evolution to object emergence

  • Authors:

  • Dalila Tamzalit;Chabane Oussalah

  • Affiliations:

  • LGI2P/Site EERIE - EMA, Part Scientifique Georges Besse, 30 035 Nîmes Cedex1 - France;Université de Nantes, IRIN, 2, rue de la Houssinière BP 92208, 44 322 Nantes Cedex 03 - France

  • Venue:
  • Proceedings of the eighth international conference on Information and knowledge management
  • Year:
  • 1999

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Abstract

Database applications which model aspects of the real world should be able to express as accurately as possible the different nuances of reality; that includes the need to evolve internally in response to signals of updates coming from the environment. These updates are not always supplied in an ideal and complete manner and are not always predefined or precisely defined. In practice, requirements for evolution generally occur during the manipulation of objects while running the database. It is frequently necessary to change individual objects, less frequently the database schema. Database systems need to have mechanisms capable, whenever and as well as possible, of assimilating this new information correctly and diagnosing and implementing the changes necessary.This paper concerns the evolution of objects inside databases. Our two main objectives are:to allow objects to evolve their structures dynamically during database maintenance and use, with all necessary impacts on the database schema;to allow, similarly, the creation and display of different plans for evolving the design, like ways of schema evolution, giving in this way a simulation tool for database design and maintenance.So, we propose a Genetic Evolution Object Model developed to have inherent capabilities for auto-adaptation between classes and instances.