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UML1986 - UML basics The class diagram 6:44 PM UML basics...

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10/9/10 6:44 PM UML basics: The class diagram Page 1 of 20 http://www.ibm.com/developerworks/rational/library/content/RationalEdge/sep04/bell/ UML basics: The class diagram An introduction to structure diagrams in UML 2 Donald Bell ( [email protected] ), IT Architect, IBM Corporation Summary: from The Rational Edge: As the most important example of the new structure diagram type in UML 2, the class diagram can be used by analysts, business modelers, developers, and testers throughout the software development lifecycle. This article offers a comprehensive introduction. Date: 15 Sep 2004 Level: Introductory Also available in: Korean Vietnamese Activity: 290840 views Comments: 7 ( View or add comments ) Average rating (based on 1310 votes) This is the next installment in a series of articles about the essential diagrams used within the Unified Modeling Language, or UML. In my previous article on sequence diagrams , I shifted focus away from the UML 1.4 spec to OMG's Adopted 2.0 Draft Specification of UML (a.k.a. UML 2). In this article, I will discuss Structure Diagrams, which is a new diagram category that has been introduced in UML 2. Because the purpose of this series is to educate people about the notation elements and their meanings, this article focuses mainly on the class diagram. The reason for this will soon become clear. Subsequent articles will cover other diagrams included in the structure category. I also want to remind readers that this series is about UML notation elements, and that these articles are not meant to provide guidance on the best approach for modeling, or how to determine what things should be modeled in the first place. Instead, the purpose of this article and of the series in general is to help with a basic understanding of notation elements — their syntax and their meanings. With this knowledge you should be able to read diagrams and create your own diagrams using the proper notation elements. This article assumes you have a rudimentary understanding of object-oriented design. For those of you who need a little assistance with OO concepts, you might try the Sun brief tutorial Object-Oriented Programming Concepts . Reading the sections "What Is a Class?" and "What Is Inheritance?" should give you enough understanding to make this article useful. In addition, David Taylor's book, Object-Oriented Technologies: A Manager's Guide , offers an excellent, high-level explanation of object-oriented design without requiring an in-depth understanding of computer programming. The yin and yang of UML 2
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10/9/10 6:44 PM UML basics: The class diagram Page 2 of 20 http://www.ibm.com/developerworks/rational/library/content/RationalEdge/sep04/bell/ Resources we think you'll like Free 90 day trial of IBM UML tools UML to/from Java UML to/from WSDL, JEE, C++, and more Working with large UML models Demo: Structural analysis diagrams IBM Academic Initiative In UML 2 there are two basic categories of diagrams: structure diagrams and behavior diagrams. Every UML diagram belongs to one these two diagram categories. The purpose of structure diagrams is to show
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