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<column name="postal_code" type="varchar" size="5" required="true" />
    <validator column="postal_code">
      <rule
        name="required"
        message="Le code postal est obligatoire." /> 
      <rule
        name="match" 
        value="/^((0[1-9])|([1-8][0-9])|(9[0-8])|(2A)|(2B))[0-9]{3}$/" 
        message="Le code postal n'est pas valide." />
    </validator>