By Can Türker (auth.), Herman Balsters, Bert de Brock, Stefan Conrad (eds.)

The 9th foreign Workshop on Foundations of types and Languages for information and items (FoMLaDO) happened in Dagstuhl Germany, Sept- ber 18{21, 2000. the subject of this workshop was once Database schema Evolution and Meta-Modeling; this FoMLaDO Workshop was once for this reason assigned the acronym DEMM 2000. those post-proceedings include the revised models of the approved papers of the DEMM 2000 workshop. Twelve general papers have been permitted for inclusion within the lawsuits. The papers deal with the subsequent matters: { Consistency of evolving concurrent details structures { Adaptive speci cations of technical info structures { switch propagation in schema evolution of object-based structures { Evolving software program of a schema evolution method { Logical characterization of schema evolution { Con?ict administration in built-in databases { Evolving relation schemas { Conceptual descriptions of adaptive info structures { OQL-extensions for metadata entry { Metamodeling of schema evolution { Metrics for conceptual schema evolution { Incremental datawarehouse building as well as the normal papers, there's an invited paper by means of Can Turk ¨ er on schema evolution in SQL99 and (object-)relational databases. Acknowledgements: we want to thank this system committee contributors for his or her paintings on reviewing the submitted papers. We additionally desire to thank all a- hors for filing papers to this workshop. in addition, all contributors of the workshop are thanked for contributing to vigorous discussions. thank you additionally to Elke Rundensteiner, who brought an invited speak at the SERF-project referring to ?exible database transformations.

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Finally, we show how this proposal covers a large number of constraint subclasses, including life-cycle based constraints and constraints based on complex derived information as view classes. 1 Introduction The high growing rate of nowadays organizations requires more and more complex information systems for their support. This complexity is expressed by several requirements which have to be fulfilled by these systems. Moreover, it is nowadays commonly recognized that apart from efficiency and user-friendly features of an intended information system, all its other (functional and nonfunctional) aspects have to be rigorously addressed in the decisive phase of specification / validation (and verification).

L. P. Chen, editors, Proc. of the 11th IEEE Int. Conf. on Data Engineering, ICDE’95, pages 165–172. IEEE Computer Society Press, Los Alamitos, CA, 1995. H. Su, K. T. Claypool, and E. A. Rundensteiner. Extending the Object Query Language for Transparent Metadata Access. In H. Balsters, B. De Brock, and S. Conrad, editors, Database Schema Evolution and MetaModeling: 9th International Workshop on Foundations of Models and Languages for Data and Objects (FOMLADO/DEMM 2000), Lecture Notes in Computer Science Vol.

This can be easily extended for dealing with post-conditions by adding conditions acting on the appropriate resulting changes. Also in creating objects particular conditions may be set on their initial attribute values. Besides that and because attribute values as well as message parameters take their values from an (user-defined ordered sorted) algebraic specification, it is quite possible to associate more constraints on these entities, using in particular sort constraint primitives [GWM+ 92].

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