Read e-book online Advances in Information Systems Development PDF

By Gabor Maygar, Gabor Knapp, Wita Wojtkowski, Gregory Wojtkowski, Jože Zupancic

ISBN-10: 0387708014

ISBN-13: 9780387708010

Information structures improvement (ISD) progresses speedily, constantly growing new demanding situations for the pros concerned. New innovations, ways and strategies of platforms improvement emerge continually during this box. development in ISD comes from study in addition to from perform. the purpose of the convention is to supply a global discussion board for the alternate of rules and reviews among academia and undefined, and to stimulate exploration of recent solutions.

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Possible manipulations on these properties include deletion, addition and changing a specific order line. This means that the responsibility for the transaction lies on the DBMS – the Sales Component cannot take any responsibility for the consistency of the transaction. However, the Sales Component can make sure that the Order is created as a temporal state (precondition) but not yet stored (persistent) in Figure 5a. In Figure 5b, the software component must ensure that a specific order exist in the DB prior to changing an order.

Fig. 3. Identification and resolution of inconsistency in view integration. The primitives used in Figure 3 are illustrated and described in Figure 2. In EM, the static dependencies are used not only to define and illustrate what is stored in the DB but also to illustrate what data that is needed by the IS. This means that the data structure illustrated in Figure 3c is used to store not only the Designing Software Components for Database Consistency 41 persistent data in the DB but also to store temporal data in the software components.

It this paper it has also been illustrated that pre- and post conditions used in the dynamic software component views corresponds to state changes in a DB. Not only can we use the DB states in a dynamic modeling process, but we should do so in order to maintain consistency in and between views. Using this approach it is possible to clearly identify the responsibilities between software components and DBMS, since this is dictated by the DB-states as well as the pre- and post conditions for the software components.

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Advances in Information Systems Development by Gabor Maygar, Gabor Knapp, Wita Wojtkowski, Gregory Wojtkowski, Jože Zupancic

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