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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<title>Dillo: UML Legend</title>
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<div id="projectname">Dillo
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<li><a href="index.html"><span>Main Page</span></a></li>
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<div class="header">
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<div class="title">UML Legend </div> </div>
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<div class="textblock"><p>This page describes the notation for several diagrams used in the documentation, which is a slight variation of UML.</p>
<h2>Classes</h2>
<p>Classes are represented by boxes, containing there names:</p>
<div align="center">
<img src="dot_inline_dotgraph_7.png" alt="dot_inline_dotgraph_7.png" border="0" usemap="#dot_inline_dotgraph_7.map"/>
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<p>(In most cases, the attributes and operations are left away, for better readibility. Just click on it, to get to the detailed description.)</p>
<p>Of course, in C++, there are no interfaces, but here, we call a class, which has only virtual abstract methods, and so does not provide any functionality, an interface.</p>
<p>Templates get a yellow background color:</p>
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<h2>Objects</h2>
<p>In some cases, an examle for a concrete constellation of objects is shown. An object is represented by a box containing a name and the class, separated by a colon.</p>
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<p>The names (<em>x</em>, <em>y</em>, and <em>z</em>) are only meant within the context of the diagram, there needs not to be a relation to the actual names in the program. They should be unique within the diagram.</p>
<p>Classes and objects may be mixed in one diagram.</p>
<h2>Associations</h2>
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<img src="dot_inline_dotgraph_10.png" alt="dot_inline_dotgraph_10.png" border="0" usemap="#dot_inline_dotgraph_10.map"/>
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<p>In this example, one instance of A refers to an arbitrary number of B instances (denoted by the "*"), and each instance of B is referred by exactly one ("1") A. The label <em>x</em> is the name of the association, in most cases the name of the field, e.g. A::x.</p>
<p>Possible other values for the <em>multiplicity:</em> </p>
<ul>
<li>
a concrete number, in most cases "1", </li>
<li>
a range, e.g. "0..1", </li>
<li>
"*", denoting an arbitrary number. </li>
</ul>
<h2>Implementations and Inheritance</h2>
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<img src="dot_inline_dotgraph_11.png" alt="dot_inline_dotgraph_11.png" border="0" usemap="#dot_inline_dotgraph_11.map"/>
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<p>In this example,</p>
<ul>
<li>
the interface B extends the interface A, </li>
<li>
the class C implements the interface A, and </li>
<li>
the class D extends the class C. </li>
</ul>
<h2>Template Instantiations</h2>
<p>Template instantiations are shown as own classes/interfaces, the instantiation by the template is shown by a yellow dashed arrow:</p>
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<img src="dot_inline_dotgraph_12.png" alt="dot_inline_dotgraph_12.png" border="0" usemap="#dot_inline_dotgraph_12.map"/>
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<p>In this example, the interface template C uses the template argument as super interface.</p>
<h2>Packages</h2>
<p>Packages are presented by dashed rectangles:</p>
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<img src="dot_inline_dotgraph_13.png" alt="dot_inline_dotgraph_13.png" border="0" usemap="#dot_inline_dotgraph_13.map"/>
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<p>Packages may be nested. </p>
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