Abstract Data Type Facility (ADF) does all the work that involves data types. It manipulates floating-point numbers, character strings, integers, and all the conversions and comparisons between them. This facility can be executed independently from the server so that other Actian X tools can also use ADF.

This abstract data type facility is also compiled into the Actian X tools such as QBF (Query-By-Forms) and the Terminal Monitor. It is used to manipulate Actian X data types in the front-end process before sending them to the DBMS Server.