By F. Estrella, Z. Kovacs, J -M. Le Goff, R. McClatchey, M. Zsenei (auth.), Peter P. Chen, David W. Embley, Jacques Kouloumdjian, Stephen W. Liddle, John F. Roddick (eds.)
The goal of the workshops linked to the ER'99 18th overseas convention on Conceptual Modeling is to offer individuals entry to excessive point displays on really good, scorching, or rising clinical subject matters. 3 subject matters were chosen during this recognize: — Evolution and alter in facts administration (ECDM'99) facing han dling the evolution of information and information constitution, — opposite Engineering in info structures (REIS'99) aimed toward exploring the problems raised through legacy structures, — the area vast net and Conceptual Modehng (WWWCM'99) which ana lyzes the mutual contribution of WWW assets and strategies with con ceptual modeling. ER'99 has been geared up in order that there isn't any overlap among convention ses sions and the workshops. as a result individuals can persist with either the convention and the workshop displays they're attracted to. i want to thank the ER'99 application co-chairs, Jacky Akoka and Mokrane Bouzeghoub for having given me the chance to prepare those workshops. i'd additionally wish to thank Stephen Liddle for his helpful assist in handling the review method for submitted papers and supporting to organize the workshop lawsuits for booklet. August 1999 Jacques Kouloumdjian Preface for ECDM'99 the 1st a part of this quantity includes the court cases of the 1st overseas Workshop on Evolution and alter in info administration, ECDM'99, which was once held at the side of the 18th foreign convention on Conceptual Modehng (ER'99) in Paris, France, November 15-18, 1999.
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Additional resources for Advances in Conceptual Modeling: ER’ 99 Workshops on Evolution and Change in Data Management, Reverse Engineering in Information Systems, and the World Wide Web and Conceptual Modeling Paris, France, November 15–18, 1999 Proceedings
Value operator allows to update the effective history of a transaction-time property instance. Operation set_value(v) applied to a transaction-time property instance, replaces its effective history by a new history, identical to the old one except that it maps the current instant to value V. If needed, the growth status of the property instance is turned on. Evolution of valid-time p r o p e r t y instances Unlike transaction-time properties, the observation domain of a valid-time property instance does not evolve automatically with the system clock.
2 Temporal objects' observation domain evolution The observation domain of transaction-time objects evolves automatically with the system clock in a similar way as that of transaction-time property instances. More precisely, each transaction-time object has a growth status, which may be On or Off. Conceptually, while a transaction-time object is On, the current instant is added to its observation domain at each system clock tick. on and turn_off allow to modify the value of the growth status of a transaction-time object.
Proc. of OOPSLA (1987) 118-125 14. : Database Support for Evolving Design Objects. Proc. of the 26th ACM/IEEE Design Automation Conference (1989) 258-263 15. : Modeling concepts for VLSI CAD objects. ACM Transactions on Database Systems 10:3 (1985) 322-346 16. : Class Modification in the GemStone Object-Oriented DBMS. Proc. of OOPSLA (1987) 111-117 17. : Type Evolution in an Object-Oriented Database. ) Directions in 0 0 Programming, MIT Press (1988) 393-415 18. : Semantics and Implementation of Schema Evolution in Object-Oriented Databases.
Advances in Conceptual Modeling: ER’ 99 Workshops on Evolution and Change in Data Management, Reverse Engineering in Information Systems, and the World Wide Web and Conceptual Modeling Paris, France, November 15–18, 1999 Proceedings by F. Estrella, Z. Kovacs, J -M. Le Goff, R. McClatchey, M. Zsenei (auth.), Peter P. Chen, David W. Embley, Jacques Kouloumdjian, Stephen W. Liddle, John F. Roddick (eds.)