HP 3000 Manuals

HP Transact Reference Manual

Alias Items 

Any data item can be assigned an alias-name--the alias is another name
for the defined data item.  You would use an alias in a Transact program
where the data dictionary definition of a data item has the same
definition but a different name in a data set.  The primary definition in
a data dictionary can be associated with one or more alias names to
identify data items in data sets that have different names.  The primary
name is always used in the Transact program.  You must define all alias
relations with a DEFINE(ITEM) statement in your program; Transact ignores
alias definitions in a data dictionary.

MPE/iX 5.0 Documentation