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7.3 The Transaction Decomposition Table Editor (TTDT)


According to this modeling technique, the entries in row 0 contain transaction names. The entries in column 0 contain object class (or entity type) names. The other entries contain zero or more action names. To graphically separate row 0 and column 0 from the rest of the table, the initial table separates them by default by a dual line. The editor does not check for that layout, however. For an example see figure 7.4. Currently, the editor checks the constraints in figure 7.3.

Figure 7.3: Immediately checked and soft constraints on TDTs.

\includegraphics {p/TDconstraints.eps}\end{center}\end{figure}

Figure 7.4: Example transaction decomposition table.

\includegraphics {p/tdt_example.eps}\end{center}\end{figure}

Frank Dehne,Faculty of Mathematics and Computer Science, Vrije Universiteit Amsterdam