<?xml version="1.0"?>
<dimensions>
  <dimension id="price" type="integer">
    <element id="cheap" value="(,10)"/>
    <element id="moderate" value="[10,20]"/>
    <element id="expensive" value="(20,)"/>
  </dimension>
  <dimension id="weight" type="double">
    <element id="light" value="(,10)"/>
    <element id="normal" value="[10,20]"/>
    <element id="heavy" value="(20,)"/>
  </dimension>
  <dimension id="shape" type="tree">
    <element id="square"/>
    <element id="circle"/>
    <element id="triangle"/>
  </dimension>
  <dimension id="tags" type="keyword"/>
</dimensions>
