ITM 500 Study Guide - Information Engineering, Unique Key, Cardinality

• School: Ryerson University
• Department: Information Technology Management
• Course: ITM 500
• Professor: Raymond Moss

Document Summary

Steps to follow to create a new erwin logical model. Launch erwin data modeler and under file menu select new and then logical: to select the correct notation from the menu : model/model. Properties/general/ select information engineering option: find the following icons on the top left -- entity ( rectangle),identifying relationship (solid line) and non-identifying. Relationship (broken line: to add an entity, click on the entity icon and drop on the model, to enter entity name, primary key and attributes use tab and enter keys. 4a do not add attributes with (fk) designation. Only the parent to child phrase is needed. To have the verb phrase displayed, from the menu: Attributes may be dragged and dropped and the short cut (right. Select the appropriate options using the null option and the. 7a. to have the cardinality displayed, from the menu: Diagram/diagrams/relationship/select display logical cardinality: to show primary key designator, from the menu: