rail:tTapTsiCore 

It is the main part of identifier and is determent by the company that creates  it.

Simple Type Information

Used By

Attribute rail:aTapTsiCompositIdentifierOperationalType/@core

Source 

<xs:simpleType name="tTapTsiCore">
  <xs:annotation>
    <xs:documentation>It is the main part of identifier and is determent by the company that creates it.</xs:documentation>
  </xs:annotation>
  <xs:restriction base="xs:string">
    <xs:minLength value="12"/>
    <xs:whiteSpace value="replace"/>
    <xs:maxLength value="12"/>
    <xs:pattern value="[\-\*0-9A-Z]{12}"/>
  </xs:restriction>
</xs:simpleType>