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    <p><strong>First You Should Understand What is UML and What is NOT</strong></p> <p>So start with reading Craig Larman's article <a href="http://blog.csdn.net/chiefsailor/article/details/1401412" rel="nofollow">What UML Is and Isn't</a></p> <p><strong>Then to Get an Idea How UML Can be Used "Wrong" Or How UML Should Not to be Used</strong> </p> <p>Read the article <a href="http://blog.csdn.net/chiefsailor/article/details/1400398" rel="nofollow">Death by UML Fever</a> by ALEX E. BELL. Pay attention to the industry experts(PHILIPPE KRUCHTEN,GRADY BOOCH) comments on that article.</p> <p><strong>Do not try to learn every detail of UML Notation</strong></p> <p>%20 of UML is enough for your %80 needs. Try not to use "less known" features. You should not have to use all UML Diagrams. Use the one that you get benefit.</p> <p><strong>Best Modeling Tool</strong></p> <p>The Best Modeling tools are is free drawing places-surfaces like white boards, flip charts even papers. Not CASE tools. Find a wall, and turn it to free drawing area with tools like <a href="http://www.magicwhiteboard.co.uk/" rel="nofollow">Whiteboard-like Cling Sheets</a></p> <p><strong>Try Agile Modeling</strong></p> <p>Check side to get an Idea about <a href="http://www.agilemodeling.com/essays/introductionToAM.htm" rel="nofollow">Agile Modeling</a></p> <p><strong>Find A Good UML Book</strong></p> <p><strong>To learn UML notation in short and brief way:</strong></p> <p>UML Distilled: A Brief Guide to the Standard Object Modeling Language (3rd Edition) by Martin Fowler </p> <p><strong>To Apply UML with a Process(RUP) in an Agile Way</strong></p> <p>Applying UML and Patterns: An Introduction to Object-Oriented Analysis and Design and Iterative Development (3rd Edition) by Craig Larman (Author)</p> <p><strong>For Short and Nice Guide with Guidelines</strong></p> <p>The Elements of UML(TM) 2.0 Style Scott W. Ambler (Author)</p> <p><strong>If You Not Like Books or Not Want to Spend Money</strong></p> <p><strong>For Class Diagrams:</strong></p> <p>Check <a href="http://www.ibm.com/developerworks/rational/library/content/RationalEdge/sep04/bell/" rel="nofollow">UML basics: The class diagram</a></p> <p><strong>For Sequence Diagrams</strong></p> <p>Check <a href="http://www.ibm.com/developerworks/rational/library/3101.html" rel="nofollow">UML basics: The sequence diagram</a></p> <p><strong>For Activity Diagrams</strong></p> <p>Check <a href="http://www.ibm.com/developerworks/rational/library/content/RationalEdge/sep03/f_umlbasics_db.pdf" rel="nofollow">UML basics: The activity diagram</a></p> <p>Check <a href="http://www.agilemodeling.com/artifacts/activityDiagram.htm" rel="nofollow">UML 2 Activity Diagrams</a></p> <p><strong>For Use Case Diagrams</strong></p> <p>Check <a href="http://www.agilemodeling.com/artifacts/useCaseDiagram.htm" rel="nofollow">UML 2 Use Case Diagrams</a></p> <p>Be carefull. <strong>Use cases are text stories</strong> which tell the interaction between user(actor) and system to achive a goal. So use case diagrams without use case texts are worthless. To gain more understanding about use cases read the following free chapters from books:</p> <ul> <li><a href="http://www.craiglarman.com/wiki/downloads/applying_uml/larman-ch6-applying-evolutionary-use-cases.pdf" rel="nofollow">Larman-Chapter 6 Applying evolutionary use cases</a> [ Free Download]</li> <li><a href="http://www.ivarjacobson.com/use_case2.0_ebook/" rel="nofollow">Use case2.0 ebook Author: Ivar Jacobson, Ian Spence, Kurt Bittner.</a> [Free Download]</li> </ul> <p><strong>For Sate Machine Diagrams</strong></p> <p>Check <a href="http://www.sparxsystems.com.au/resources/uml2_tutorial/uml2_statediagram.html" rel="nofollow">Sparx EA UML 2 State Machine Diagram </a></p> <p><strong>For the Component Diagrams</strong></p> <p>Check <a href="http://www.ibm.com/developerworks/rational/library/dec04/bell/" rel="nofollow">UML basics: The component diagram</a></p> <p><strong>For Deployment Diagrams</strong> Check <a href="http://www.sparxsystems.com.au/resources/uml2_tutorial/uml2_deploymentdiagram.html" rel="nofollow">Sparx EA UML 2 Deployment Diagram</a></p> <p>PS: There are other diagrams but those are most widely used ones.</p> <p><strong>AND Google it ...</strong> For example I google it and see the <a href="http://www.uml-diagrams.org/uml-25-diagrams.html" rel="nofollow">http://www.uml-diagrams.org/uml-25-diagrams.html</a> side. It seems a good side for details.</p>
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