rail:engine 

engine data about a motor car or locomotive

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

Element Information

Model

rail:propulsion* , rail:pantograph* , rail:energyStorage* , rail:monitoring{0,1}
Children: rail:energyStorage, rail:monitoring, rail:pantograph, rail:propulsion

Attributes

QName Type Fixed Default Use Inheritable Annotation
axleDriveType rail:tAxleDriveType optional 
way of transmitting the torque onto axle
haulageLoad rail:tWeightTons optional 
permissible load attached to the vehicle in metric tons

Source 

<xs:element name="engine" type="rail:eEngine" minOccurs="0">
  <xs:annotation>
    <xs:documentation>engine data about a motor car or locomotive</xs:documentation>
    <xs:documentation source="http://wiki.railml.org/index.php?title=RS:engine"/>
  </xs:annotation>
</xs:element>

Sample