rail:efficiency 

transmission efficiency vs. speed

http://wiki.railml.org/index.php?title=RS:efficiency_gear

Element Information

Model

ANY element from namespace(s) 'http://www.w3.org/1998/Math/MathML' , rail:valueTable{0,1}
Children: rail:valueTable

Source 

<xs:element name="efficiency" type="rail:tEfficiencyCurve" minOccurs="0">
  <xs:annotation>
    <xs:documentation>transmission efficiency vs. speed</xs:documentation>
    <xs:documentation source="http://wiki.railml.org/index.php?title=RS:efficiency_gear"/>
  </xs:annotation>
</xs:element>

Sample