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Introduction to the Z Example One

The Exam Schedule system manages final exams in college courses, allowing addition, deletion, updating, and search functionalities. The Z specification covers given sets, state schema, initial state, and operations for course and date management.

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Introduction to the Z Example One

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  1. Introduction to the ZExample One

  2. Write Z specifications for the Exam Schedule Problem • The Exam Schedule system keeps track of all final exams. It allows you to add, delete, update, and search exams of all courses in the college. Every exam has a specific date.

  3. The Z specification should include: • Given Sets • State Schema • Initial State • Operations

  4. The Exam Schedule Z Specification 1. Given Sets [COURSE,DATE]

  5. The Exam Schedule Z Specification • State definition • ExamSchedule • courses: P COURSE • exam: COURSE ⇸DATE • courses = dom exam

  6. The Exam Schedule Z Specification 3. Initial State ExamScheduleInit ExamSchedule courses = Ø

  7. The Exam Schedule Z Specification Operations Add exam Delete exam Find exam Change date

  8. The Exam Schedule Z Specification Operations (AddExam) AddExam  ExamSchedule course? : COURSE date?: DATE course?  courses courses’= courses {course?} exam’ = exam {course?↦ date?}

  9. The Exam Schedule Z Specification Operations (DeleteExam) DeleteExam  ExamSchedule course? : COURSE course? courses courses’= courses\{course?}

  10. The Exam Schedule Z Specification Operations (FindExam) FindExam ExamSchedule course? : COURSE date!: DATE course? courses date! = exam(course?) X

  11. The Exam Schedule Z Specification Operations (ChangeDate) ChangeDate  ExamSchedule course? : COURSE date?: DATE course? courses exam’ = exam {course? ↦date?}

  12. The Exam Schedule Z Specification Operations (ChangeDate) ChangeDate  ExamSchedule course? : COURSE date?: DATE course? courses exam’ = exam {course? ↦date?}

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