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<title>component</title>
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<h1>component</h1>
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<p>The keyword is used to define a test component type.
<ul>
<li>Test component is an entity on which test behavior is executed</li>
<li>Test component is owner of the test ports</li>
<li>Constants, variable and timers declared in the component type are visible from all functions and test cases, which execute on that very component type</li>
<li>Several test components can run in parallel â each executes independently</li>
</ul>
<p>Related keywords:</p>
<ul>
<li><a href="type.html"><b><font face="Courier New" color="#003258" size="4">type</font></b></a></li>
<li><a href="port.html"><b><font face="Courier New" color="#003258" size="4">port</font></b></a></li>
<li><a href="const.html"><b><font face="Courier New" color="#003258" size="4">const</font></b></a></li>
<li><a href="var.html"><b><font face="Courier New" color="#003258" size="4">var</font></b></a></li>
<li><a href="timer.html"><b><font face="Courier New" color="#003258" size="4">timer</font></b></a></li>
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<h3 align="center"><font face="Courier New" color="#003258" size="5"><b>type component </b></font> <i>component_identifier </i><font face="Courier New" color="#003258" size="5"><b>{</b></font>
[ <i>port_instance</i><font face="Courier New" color="#003258" size="5"><b>;</b></font> ] [ <i>const_def</i><font face="Courier New" color="#003258" size="5"><b>;</b></font> ] [ <i>var_instance</i><font
face="Courier New" color="#003258" size="5"><b>;</b></font> ] [ <i>timer_instance</i><font face="Courier New" color="#003258" size="5"><b>;</b></font> ] <font face="Courier New"
color="#003258" size="5"><b>};</b></font></h3>
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<ul>
<li>
<p>The <a href="type.html"><font face="Courier New" color="#003258" size="4"><b>type</a> component</b></font> keywords introduce the component definition.</p>
</li>
<li>
<p><i>component_identifier</i> is the name used to refer to the component. Must begin with a letter, may contain letters, numbers and underscore characters. <br>
According to the Naming convention, the suffix <b> _CT</b> is recommended.</p>
</li>
<li>
<p><i>port_instance</i> identifies the ports owned by the port. For the syntax see the initial keyword <a href="port.html"><b><font face="Courier New" color="#003258"
size="4">port</font></b></a>.</p>
</li>
<li>
<p><i>const_def</i> defines constants visible from all functions and test cases, which execute on that very component type. For the syntax see the initial keyword <a href="const.html"
target="_blank"><b><font face="Courier New" color="#003258" size="4">const</font></b></a>.</p>
</li>
<li>
<p><i>var_instance</i> identifies variables visible from all functions and test cases, which execute on that very component type. For the syntax see the initial keyword <a href="var.html"
target="_blank"><b><font face="Courier New" color="#003258" size="4">var</font></b></a>.</p>
</li>
<li>
<p><i>timer_instance</i> identifies timers visible from all functions and test cases, which execute on that very component type. For the syntax see the initial keyword <a href="timer.html"
target="_blank"><b><font face="Courier New" color="#003258" size="4">timer</font></b></a>.</p>
</li>
</ul>
<p>Every element within the curly brackets may be repeated.</p>
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<p>Example 1:
<p><font face="Courier New">type component MyComponentType_CT {<br>
port MyMessagePortType_PT P1_PCO,P2_PCO;<br>
const bitstring c_MyConst := â1001âB; <br>
var integer v_MyVar; <br>
timer T_MyTimer := 1.0; <br>
}</font>
<p>The component called MyComponentType_CT is declared. <br>
It contains two ports (P1_PCO,P2_PCO) of type MyMessagePortType_PT, <br>
a constant called c_MyConst which equals 1001, <br>
a variable called v_MyVar <br>
and a timer called T_MyTimer with a default value of 1 second.</p>
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<p><a HREF="BNF.html#componentdef">BNF definition</a> of <font face="Courier New"> component</font></p>
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