1. The State of Status Copyright © 1999 Patrick McDermott UC Berkeley Extension pmcdermott@msn.com

2. Etymology State Status Mode

3. State vs. Value State same as value? Bank account with $123,456 different STATE than $123,457?

4. State Coke Machine Not for each amount: price changes, so does state diagram; Yen dif from $ 2do: Graphix

5. Course Tentative Under-enrolled Open Closed Cancelled

6. Order Placed Pending Filled Closed

7. Employee Prospect Applicant Candidate Employee Retiree

8. 2, not 1 Paid Fulfilled

9. Task Created Assigned Closed –no more hours

10. Assumed Serial State Order of an Order DMV See Note Page

11. Questions Can they be separate classes? –Different Enough? Can you swim upstream? Can you Re-Open? –Re-start –Different then?

12. Employee Prospect Applicant

13. Separate Class PROSPECT APPLICANT EMPLOYEE RETIREE

14. Generalization PROSPECTAPPLICANTCURRENTRETIREE EMPLOYEE

15. Status Attribute EMPLOYEE StatusCode: char Status Codes P – Prospect A – Applicant E – Employee R – Retiree