<chart>
  <data>
    <group type="value">
      <column id="x" name="X" values="0.2 1 1.6" format="en"/>
      <column id="y" name="Y" values="0.2 1 1.6" format="en"/>
    </group>
    <column id="size" type="size" values="-1 1 0"/>
  </data>
  <attributes chartType="scatter">
    <image width="300" height="200"/>
    <plot pointShape="circle" lineStroke="0"/>
  </attributes>
</chart>
