GETATTR
Syntax
GETATTR(DimName, ElemName, ATabID,
          FieldName)
      
DimName is the name of the dimension
        containing the attribute table. ElemName is the element
        the attribute is attached to. ATabID is the ID of the
        attribute table containing the attributes. FieldName is
        the name of the column in the attribute table containing the attributes. 
Example
If the APRODUCT field for the Car Tires Summer element in attribute table 1 of the Product dimension contains the text "Tanja.Saarbruecken@Genesis.com" then:
GETATTR('Product', 'Car Tires Summer', 1,
          'APRODUCT')
Returns Tanja.Saarbruecken@Genesis.com.
The GETATTR function is analogous to
        an external cube reference in a cube rule. For example, if you want to write the above rule
        as a rule for all products, you substitute !Products for
          Car Tires Summer in the second argument of the
        function.