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== [[Assignment 1 Q&A Fall 2013 |Assignment 1 Q&A]]==
*Is the relationship between schedule and student/teacher 1:1? (ie: to delete a schedule you can just delete the account that schedule is attached to) -- Dennis
::The assignment specifies we include "validfrom" and "validto" dates. This implies that we could have several schedules for each student/teacher. eg. one for summer, another for fall, etc. However, this being our first assignment I think it would be reasonable to have exactly one timetable per student/teacher. We would then use the "validfrom" and "validto" dates to tell us when the schedule has become outdated.... John
