Advances in Information Systems Development: Volume 2 by Gabor Maygar, Gabor Knapp, Wita Wojtkowski, Gregory

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

This quantity contains the complaints of the fifteenth overseas convention on details structures improvement (ISD). ISD progresses quickly, consistently developing new demanding situations. development in ISD comes from learn in addition to from perform. the purpose of the convention is to supply a world discussion board for the trade of principles and reviews among academia and undefined, and to stimulate exploration of recent solutions.

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The MDA idea is promising – raising up the level of abstraction, on which systems are developed, we could develop more complex systems more qualitatively. Fig. 1 gives the general idea of separating system aspects according to the levels of abstraction. 26 Natalja Pavlova Fig. 1. Levels of abstraction in the framework of MDA The main idea is to achieve formal system representation at the as high as possible level of abstraction. Nowadays in MDA tools, formalization begins somewhere in the middle of the PSM stage, and researchers try to “raise” it up as high as possible to fulfill the main statement of the MDA [1].

6 [14]. }, where U’= {A’, B’, C’, D’, E’, F’} are arcs received from nodes of G1 and nodes for G2 could be received from arcs of G1. The receiving of G2 nodes is used and described below. Fig. 6. Formal transformation of graphs It is necessary to investigate a sub-set of models of the 2HMD as graphs in order to be able to apply the graph theory. 7 - G1 (P’, U’) corresponds to the system functioning model, where P’= {Pe’, P1’, P2’, P3’, P4’, P5’} is the set of system business functions, and U’= {A’, B’, C’, D’, E’, F’, G’} is the set of information flows among the processes.

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. In addition we are able to create consistency between the different views used for the IS design as well as DB design, ensuring a consistent modeling of IS properties and interactions. Finally, by applying the EM approach for designing software components for DB consistency, as illustrated in this paper, the inconsistency problem is reduced.

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