<!DOCTYPE OMNotebook>
<Notebook>
 <GroupCell closed="false" >
  <GroupCell closed="false" >
   <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;">Short Classes&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;">&lt;br />There is a short syntax for defining classes, commonly used to introduce more informative type names for existing classes.&lt;/p>&lt;/body>&lt;/html></Text>
   </TextCell>
   <InputCell style="Input" closed="true" >
    <Input>class Voltage = Real(Unit = "V");</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 />The same thing can be written using the keyword &lt;span style=" font-family:Courier New;">type&lt;/span> instead:&lt;/p>&lt;/body>&lt;/html></Text>
   </TextCell>
   <InputCell style="Input" closed="true" >
    <Input>type Voltage = Real;</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 />The short class definition is the only way to introduce a "class" name for an array type:&lt;/p>&lt;/body>&lt;/html></Text>
   </TextCell>
   <InputCell style="Input" closed="true" >
    <Input>type Matrix10 = Real [10, 10];</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 />A short class definition is in most cases just a shorter syntax for defining a class that could just as well be defined using the standard inheritance syntax:&lt;/p>&lt;/body>&lt;/html></Text>
   </TextCell>
   <InputCell style="Input" closed="true" >
    <Input>type Voltage
  extends Real(unit = "V", min = -220.0, max = 220.0);
end Voltage;
</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 />Which is just the same as this:&lt;/p>&lt;/body>&lt;/html></Text>
   </TextCell>
   <InputCell style="Input" closed="true" >
    <Input>type Voltage = Real(unit = "V", min = -220.0, max = 220.0);</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 />Writing array types is done this short way:&lt;/p>&lt;/body>&lt;/html></Text>
   </TextCell>
   <InputCell style="Input" closed="true" >
    <Input>type Force3 = Real[3](unit={"N","N","N"});</Input>
    <Output></Output>
   </InputCell>
  </GroupCell>
 </GroupCell>
</Notebook>
