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AllFusion ERwin Data Modeler
® ®

Methods Guide
r7.2

This documentation and any related computer software help programs (hereinafter referred to as the “Documentation”) is for the end user’s informational purposes only and is subject to change or withdrawal by CA at any time. This Documentation may not be copied, transferred, reproduced, disclosed, modified or duplicated, in whole or inpart, without the prior written consent of CA. This Documentation is confidential and proprietary information of CA and protected by the copyright laws of the United States and international treaties. Notwithstanding the foregoing, licensed users may print a reasonable number of copies of the Documentation for their own internal use, and may make one copy of the related software as reasonablyrequired for back-up and disaster recovery purposes, provided that all CA copyright notices and legends are affixed to each reproduced copy. Only authorized employees, consultants, or agents of the user who are bound by the provisions of the license for the product are permitted to have access to such copies. The right to print copies of the Documentation and to make a copy of the related software islimited to the period during which the applicable license for the product remains in full force and effect. Should the license terminate for any reason, it shall be the user’s responsibility to certify in writing to CA that all copies and partial copies of the Documentation have been returned to CA or destroyed. EXCEPT AS OTHERWISE STATED IN THE APPLICABLE LICENSE AGREEMENT, TO THE EXTENT PERMITTEDBY APPLICABLE LAW, CA PROVIDES THIS DOCUMENTATION “AS IS” WITHOUT WARRANTY OF ANY KIND, INCLUDING WITHOUT LIMITATION, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT. IN NO EVENT WILL CA BE LIABLE TO THE END USER OR ANY THIRD PARTY FOR ANY LOSS OR DAMAGE, DIRECT OR INDIRECT, FROM THE USE OF THIS DOCUMENTATION, INCLUDING WITHOUT LIMITATION, LOSTPROFITS, BUSINESS INTERRUPTION, GOODWILL, OR LOST DATA, EVEN IF CA IS EXPRESSLY ADVISED OF SUCH LOSS OR DAMAGE. The use of any product referenced in the Documentation is governed by the end user’s applicable license agreement. The manufacturer of this Documentation is CA. Provided with “Restricted Rights.” Use, duplication or disclosure by the United States Government is subject to the restrictions setforth in FAR Sections 12.212, 52.227-14, and 52.227-19(c)(1) - (2) and DFARS Section 252.2277014(b)(3), as applicable, or their successors. All trademarks, trade names, service marks, and logos referenced herein belong to their respective companies. Copyright © 2006 CA. All rights reserved.

CA Product References
This document references the following CA products: AllFusion® ERwin® DataModeler AllFusion® Model Manager

Contact Technical Support
For online technical assistance and a complete list of locations, primary service hours, and telephone numbers, contact Technical Support at http://ca.com/support.

Contents
Chapter 1: Introduction 9
Purpose Of This Guide ......................................................................... 9 Benefits of Data Modeling..................................................................... 10 Methods ..................................................................................... 10 Typographical Conventions .................................................................... 11

Chapter 2: Information Systems, Databases, and Models

13

Introduction.................................................................................. 13 Data Modeling ............................................................................ 14 Process Modeling ......................................................................... 15 Data Modeling Sessions ....................................................................... 15 Session Roles ................................................................................
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