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/** \page uml-legend UML Legend
This page describes the notation for several diagrams used in the
documentation, which is a slight variation of UML.
<h2>Classes</h2>
Classes are represented by boxes, containing there names:
\dot
digraph G {
node [shape=record, fontname=Helvetica, fontsize=10];
fontname=Helvetica; fontsize=8;
"Concrete Class";
"Abstract Class" [color="#a0a0a0"];
Interface [color="#ff8080"];
}
\enddot
(In most cases, the attributes and operations are left away, for
better readibility. Just click on it, to get to the detailed
description.)
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.
Templates get a yellow background color:
\dot
digraph G {
node [shape=record, fontname=Helvetica, fontsize=10,
fillcolor="#ffffc0", style="filled"];
fontname=Helvetica; fontsize=8;
"Concrete Class Template";
"Abstract Class Template" [color="#a0a0a0"];
"Interface Template" [color="#ff8080"];
}
\enddot
<h2>Objects</h2>
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.
\dot
digraph G {
node [shape=record, fontname=Helvetica, fontsize=10];
edge [arrowhead="open", labelfontname=Helvetica, labelfontsize=10,
color="#404040", labelfontcolor="#000080"];
fontname=Helvetica; fontsize=10;
"x: A" -> "y1: B";
"x: A" -> "y2: B";
}
\enddot
The names (\em x, \em y, and \em z) 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.
Classes and objects may be mixed in one diagram.
<h2>Associations</h2>
\dot
digraph G {
node [shape=record, fontname=Helvetica, fontsize=10];
edge [arrowhead="open", labelfontname=Helvetica, labelfontsize=10,
color="#404040", labelfontcolor="#000080",
fontname=Helvetica, fontsize=10, fontcolor="#000080"];
fontname=Helvetica; fontsize=10;
A -> B [headlabel="*", taillabel="1", label="x"];
}
\enddot
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 is the name of the association,
in most cases the name of the field, e.g. A::x.
Possible other values for the \em multiplicity:
<ul>
<li> a concrete number, in most cases "1",
<li> a range, e.g. "0..1",
<li> "*", denoting an arbitrary number.
</ul>
<h2>Implementations and Inheritance</h2>
\dot
digraph G {
node [shape=record, fontname=Helvetica, fontsize=10];
edge [arrowhead="none", arrowtail="empty", labelfontname=Helvetica,
labelfontsize=10, color="#404040", labelfontcolor="#000080"];
fontname=Helvetica; fontsize=10;
A[color="#ff8080"];
B[color="#ff8080"];
C;
D;
A -> B;
A -> C [style="dashed"];
C -> D;
}
\enddot
In this example,
<ul>
<li> the interface B extends the interface A,
<li> the class C implements the interface A, and
<li> the class D extends the class C.
</ul>
<h2>Template Instantiations</h2>
Template instantiations are shown as own classes/interfaces, the
instantiation by the template is shown by a yellow dashed arrow:
\dot
digraph G {
node [shape=record, fontname=Helvetica, fontsize=10];
edge [arrowhead="none", arrowtail="empty", labelfontname=Helvetica,
labelfontsize=10, color="#404040", labelfontcolor="#000080"];
fontname=Helvetica; fontsize=10;
A[color="#ff8080"];
B[color="#ff8080"];
C[color="#ff8080", fillcolor="#ffffc0", style="filled"];
C_A[color="#ff8080", label="C \<A\>"];
C_B[color="#ff8080", label="C \<A\>"];
D;
C -> C_A [arrowhead="open", arrowtail="none", style="dashed",
color="#808000"];
C -> C_B [arrowhead="open", arrowtail="none", style="dashed",
color="#808000"];
A -> C_A;
B -> C_B;
C_A -> D [style="dashed"];
}
\enddot
In this example, the interface template C uses the template argument
as super interface.
<h2>Packages</h2>
Packages are presented by dashed rectangles:
\dot
digraph G {
node [shape=record, fontname=Helvetica, fontsize=10];
edge [arrowhead="none", arrowtail="empty", labelfontname=Helvetica,
labelfontsize=10, color="#404040", labelfontcolor="#000080"];
fontname=Helvetica; fontsize=10;
subgraph cluster_1 {
style="dashed"; color="#000080"; fontname=Helvetica; fontsize=10;
label="package 1";
A;
B [color="#a0a0a0"];
}
subgraph cluster_2 {
style="dashed"; color="#000080"; fontname=Helvetica; fontsize=10;
label="package 2";
C;
D [color="#a0a0a0"];
E
}
A -> C;
B -> D;
D -> E;
E -> A [arrowhead="open", arrowtail="none"];
}
\enddot
Packages may be nested.
*/
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