rail:tTwoDigits 

an identification string consisting of exactly two digits

Simple Type Information

Used By

Attribute rail:tOcpTsi/@country

Source 

<xs:simpleType name="tTwoDigits">
  <xs:annotation>
    <xs:documentation>an identification string consisting of exactly two digits</xs:documentation>
  </xs:annotation>
  <xs:restriction base="rail:tDigitString">
    <xs:length value="2"/>
  </xs:restriction>
</xs:simpleType>