Re-using of value translations in mappings

Suppose that for a number of different interfaces/mappings the same translation has to be done.

e.g. BUKRS A1 -> 0001

BUKRS A2 -> 0002

BUKRS B1 -> 0100

Is there some way to define the translation logic on a central place in stead of in every mapping where this translation has to be performed? The reason is easy maintenance when the translation has to change or extended.

Kind regards,

Léon.