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<Notebook>
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   <TextCell style="Title" >
    <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:Arial; font-size:38pt; font-weight:600; color:#000000;">Equations in Declarations&lt;/p>&lt;/body>&lt;/html></Text>
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    <TextCell style="Section" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:Times; font-size:18pt; font-weight:600; color:#000000;">Declaration Equations&lt;/p>&lt;/body>&lt;/html></Text>
    </TextCell>
    <TextCell style="Text" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:Times New Roman; font-size:12pt; color:#000000;">Declaration equations are usually given as part of declarations of constants or parameters. Such equations are actually required for constants, but are optional for parameters. An equation always holds, which means that the &lt;span style=" font-family:Courier New;">mass&lt;/span> never changes value during simulation. It is also possible to specify a declaration equation for a normal state variable, but this will make the variable bahave as a kind of constant.&lt;span style=" font-family:Courier New;">&lt;br />&lt;/span>&lt;/p>&lt;/body>&lt;/html></Text>
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     <Input>class DecEq
  constant Integer one   = 1;          // Declaration equation
  parameter Real mass   = 22.5;          // -"-
  Real speed       = 72.4;          // Declaration equation for a normal state variable
end Deceq;
</Input>
     <Output></Output>
    </InputCell>
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    <TextCell style="Section" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:Times; font-size:18pt; font-weight:600; color:#000000;">Modifier Equations&lt;/p>&lt;/body>&lt;/html></Text>
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    <TextCell style="Text" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:Times New Roman; font-size:12pt; color:#000000;">Modifier equations occur for example in a variable declaration when there is a need to modify the default value of an attribut of the variable. A modifier equation replaces the declaration equation, if present, for an attribute of the specific type. A common usage is modifier equations for the start attribute of variables, the equations also occur in type definitions.&lt;br />&lt;/p>&lt;/body>&lt;/html></Text>
    </TextCell>
    <InputCell style="Input" closed="true" >
     <Input>class ModEq
  Real speed(start = 72.4);            // Modifier equation
end ModEq;
</Input>
     <Output></Output>
    </InputCell>
    <TextCell style="Text" >
     <Text>&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;/head>&lt;body style=" white-space: pre-wrap; font-family:MS Shell Dlg; font-size:8.25pt; font-weight:400; font-style:normal; text-decoration:none;">&lt;p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; font-family:Times New Roman; font-size:12pt; color:#000000;">&lt;br />Here is another example of a modifier equation:&lt;/p>&lt;/body>&lt;/html></Text>
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    <InputCell style="Input" closed="true" >
     <Input>type Voltage = Real(unit = "V", min = -220.0, max = 220.0);
</Input>
     <Output></Output>
    </InputCell>
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