<mugl>
  <horizontalaxis type="datetime" >
    <labels format="%d %n %H:00" spacing="1D 12H 6H 4H 2H 1H" />
    <title/>
  </horizontalaxis>
  <verticalaxis type="number" min="17.0" max="20.5">
    <title angle="90">temp</title>
  </verticalaxis>
 <plot>
    <renderer type="line">
      <option name="linecolor" value="blue"/>
      <option name="dotcolor"  value="blue"/>
      <option name="dotsize"   value="2"/>
    </renderer>
 </plot>
 <data>
    <variables>
      <variable id="time" type="datetime"/>
      <variable id="temp"/>
    </variables>
    <values>
200905280000,20.0
200905280100,19.0
200905280200,18.9
200905280300,18.5
200905280400,18.2
200905280500,17.9
200905280600,17.5
200905280700,17.5
200905280800,17.7
200905280900,17.8
200905281000,17.6
200905281100,17.5
200905281200,17.7
    </values>
 </data>
</mugl>