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7.4 The Transaction-Use Table Editor (TTUT)

According to this modeling technique, this table has five columns. The entries in row 0 are initialized with the labels Create, Read, Update and Delete. The entries in column 0 contain transaction names. The other entries contain zero or more object class (or entity type) names. To graphically separate row 0 and column 0 from the rest of the table, the initial table separates them by a dual line. The editor does not check for that layout, however. For an example see figure 7.5. The editor checks the immediately and soft constraints of figure 7.6.

**Figure 7.5:** *Example transaction-use table.*
$\begin{figure} \begin{center} \includegraphics [width=5.5in]{p/tut_example.eps}\end{center}\end{figure}$

**Figure 7.6:** *Immediately checked and soft constraints on TUTs.*
$\begin{figure} \begin{center} \includegraphics {p/TUconstraints.eps}\end{center}\end{figure}$

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