Next: 7.4 The Transaction-Use Table Up: 7 Table Editing Previous: 7.2 The Generic Table

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

**Figure 7.4:** *Example transaction decomposition table.*
$\begin{figure} \begin{center} \includegraphics {p/tdt_example.eps}\end{center}\end{figure}$

Frank Dehne,Faculty of Mathematics and Computer Science, Vrije Universiteit Amsterdam
11/17/1997