Your Wish is My Command

7.3 Toward a Complete Solution 153

These three remarks are the basis of the user interface and the dialogue

conventions of the EBP system. The definition process is the following. Two

commands are provided: REPEAT and UNTIL. The first one initiates the

loop description and allows the user to record the actions of each loop. The

second one stops the loop definition and starts the definition of the condi-

tion. Because of the PBD process, another step is necessary, which consists

of defining the recurrence relationships between one loop and the following

loop. After some experience with users, it seemed to enhance usability if we ...