UIC Train Transport ID

Request for an international TainID as suggested by the UIC.

The specification of the id can be found here: http://www.uic.org/IMG/pdf/111122_wg_10_handbook_final.pdf

The id has the following structure: "Object Type" : alphanumeric enumeration with values "TR", "PA", "PR", "CR" "Company": four digits numeric "Core": 12 letters alphanumeric "Variant": 2 letters alphanumeric "Timetable year": year "Start date": date (for operational trains)

The id should be modeled as an optional child of .