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(e)  All modules must have at least one assessment worth over 50%.  (f)  Students can only have assessments for modules, which they are taking.

(e)  All modules must have at least one assessment worth over 50%.  (f)  Students can only have assessments for modules, which they are taking.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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  1. (e)  All modules must have at least one assessment worth over 50%. 

  2. (f)  Students can only have assessments for modules, which they are taking. 

Below is a UML model describing a typical organization of class modules taken by students: A student can take several modules. (Note that a module is offered even if it is not taken by any student). Each module is associated with a set of assessments to be done by each student. An assessment can be either an exam lasting a couple of hours or a coursework to be submitted by a certain due date. Student 0. 1..* Module name: String taken_by takes code: String submitted_by credit: Integer for_module set_work submits Assessment weight: Integer Exam Coursework| hours: Integer date: String Please write the following Constraints in OCL.
Transcribed Image Text:Below is a UML model describing a typical organization of class modules taken by students: A student can take several modules. (Note that a module is offered even if it is not taken by any student). Each module is associated with a set of assessments to be done by each student. An assessment can be either an exam lasting a couple of hours or a coursework to be submitted by a certain due date. Student 0. 1..* Module name: String taken_by takes code: String submitted_by credit: Integer for_module set_work submits Assessment weight: Integer Exam Coursework| hours: Integer date: String Please write the following Constraints in OCL.
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