derivedDataType CarSelString4to011DT

EcimDerivedString with length (4..11) constraint.
Should really be using (4..9) but we have to use this higher limit becuase of COM is counting the + sign as \2B and think the value is 3 character long :(

References from:: CarSelCarrierContext;

string CarSelString4to011DT [ 4..11 ]
Valid values: ^(\+|\\(\+|(2[Bb])))[0-9]{3,8}