Communicating sequential processes
Communicating sequential processes
Compilers: principles, techniques, and tools
Compilers: principles, techniques, and tools
Error messages: the neglected area of the man/machine interface
Communications of the ACM
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This paper describes an algorithm to automatically generate error messages for events refused by a process expression. It can be used in the context of an information system specified with the EB3 method. In this method, a process expression is used to describe the valid traces of events that the information system must accept. If a user submits an event which is rejected by this process expression, our algorithm produces an error message explaining why the event has been rejected; it also suggests which event should be submitted in order to correct the error.