relativePosition

<attribute name="relativePosition">
  <simpleType>
    <restriction base="string">
      <enumeration value="Before"/>
      <enumeration value="After"/>
      <enumeration value="Begins"/>
      <enumeration value="Ends"/>
      <enumeration value="During"/>
      <enumeration value="Equals"/>
      <enumeration value="Contains"/>
      <enumeration value="Overlaps"/>
      <enumeration value="Meets"/>
      <enumeration value="OverlappedBy"/>
      <enumeration value="MetBy"/>
      <enumeration value="BegunBy"/>
      <enumeration value="EndedBy"/>
    </restriction>
  </simpleType>
</attribute>