scaleunituri 

The units which apply to the rating scale - expressed by a URI / either the scaleunit or the scaleunituri attribute MUST be used

Attribute Information

Used By

Element rating

Source 

<xs:attribute name="scaleunituri" type="IRIType">
  <xs:annotation>
    <xs:documentation>The units which apply to the rating scale - expressed by a URI / either the scaleunit or the scaleunituri attribute MUST be used</xs:documentation>
  </xs:annotation>
</xs:attribute>

Sample