2012-05-21 15:12:37 +04:00
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2002-01-16 04:06:26 +03:00
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1">
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<title>Layout High Level design Template</title>
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<meta name="author" content="Marc Attinasi (attinasi@netscape.com)">
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</head>
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<body>
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<h1><font color="#cc0000">Gecko Layout High Level Design Document Template</font></h1>
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[Use this template to start your high level design. Replace items in square
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brackets with the appropriate text for your component, class or system. Keep
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in mind that this is just a general template intended for most designs.
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Your specific design may require different organization or topics - the
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goal is to provide high-level information about the software to the reader.]<br>
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<br>
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<h1>[Component/Class/System Name] High Level Design</h1>
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<br>
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<h2>Overview</h2>
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[Provide a descriptive overview of the component, class, or system that
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you are documenting. Describe what the system is supposed to do, where it
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is in the overall system, who the clients are, how it is expected to perform,
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and any other information that is important to convey to somebody interested
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in understanding what the documented system is all about.]<br>
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<br>
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<h2>Data Model</h2>
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[This section describes the classes or components that make up the data
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model for the system being documented. It can include a graphical representation
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of the classes and their relationships to each other (derivation, aggregation,
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ownership, usership, etc.). No implementation details are to be included
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here, but general relationships and inter-relationships should be shown and
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briefly described. The reader should be able to understand the players in
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the system, and the extent to which those players interact with or are related
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to the other players.]<br>
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<h4>Class/Component Diagram</h4>
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<blockquote>
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<div align="Left"><img src="ExampleClassDiagram.jpg" alt="Example Class Diagram" width="324" height="270" title="Example Class Diagram">
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<br>
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</div>
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</blockquote>
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<ul>
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<li>[Class/<a href="Link%20To%20Component%20A%20Detailed%20Design">
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Component A</a>
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]: This class is used to...</li>
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<li>[Class/<a href="Link%20To%20Component%20B%20Detailed%20Design">
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Component B</a>
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]: This class works with Class A to...<br>
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</li>
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</ul>
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<br>
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<h2>Use Case</h2>
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[Use Cases describe interactions between specific instances of the objects
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or components described in the Data Model. There will generally be
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use cases for each interesting runtime interaction between the objects
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in the system. An extremely simple system will have at least one use case
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describing the behavior of the simple system in action, but most systems
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have many use cases corresponding to the any things that the system does.
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The reader should be able to find the use case (or cases) that correspond
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to the situation they are interested in understanding, and they should be
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able to learn how data flows through the system, what objects are involved,
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how object and data life-cycles are managed (e.g. where allocations
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ad deallocations occur, and who maintains ownership). This section makes up
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the bulk of the document. It touches on implementations and algorithms, but
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rather than describing them in detail, it stays high-level and links to the
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detailed designs that correspond.]<br>
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<h4>[Use Case 1: Component is Created]</h4>
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The component is created by a client with...<br>
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[Image could go here if it were interesting enough...]<br>
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<br>
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<h4>[Use Case 2: Component is Destroyed]</h4>
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When the client is finished with the instance they created (or were given
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ownership of) the destroy it by calling...<br>
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<br>
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<h4>[Use Case 3: Component is used to find all invalid links on the page]</h4>
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Descriptive text of how the component is invoked goes here. The other
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components that it uses to carry out its task are shown, and the general
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flow of data is documented.<br>
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[Picture of the component instance with annotations showing data flow,
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ownership, etc. goes here]<br>
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<h2>State Transitions</h2>
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[Where appropriate, the discrete states of a system should be enumerated
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and the transitions between the states defined. Not all systems require
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full state transition diagrams, but most systems have at least a handful
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of interesting states, and at least a small number of interesting stimuli
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that cause transitions from one state to another. Of course, classes
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or components that are not stateful have no need for this section.]<br>
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<br>
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<br>
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</body>
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</html>
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