The size of a field name in sap 2005 is now 18 characters, with the "U_" this is 20. This design can also been found in table definition of the CUFD table (AliasID nvarchar(18)).
However when you define a UDO on top of some usertables you cannot add columns with a column name bigger then 10 characters (including the "U_") to the default forms. This design can also been found in the table definition of the UDO3 tables (ColAlias nvarchar(10))
Can anyone explain this (poor) design?