The ADPLPFXT data area maps the format parameter extension. This data area is used by exit routines to communicate additional information to the formatting service. It is pointed to from the ADPLPEXP field in the format parameter. It can be used together with current models if only one data area is described. The advantage of its use is the ability to describe a data area in terms of an equate symbol record, and the availability of additional formatting specifications.

It must be used together with a multiple source model, and the areas described must match with the source index values in the model.