What's the role of data in praxeology

Praxeology is a purely logic discipline. As such is aprioristic: its content is completly alien to facts of reality. Nevertheless, it is not totally disentangled from them. Some roles which data can perform in praxeology are:

1. Helping leading the specific fields in which praxeology must be developed.

2. Accompanying praxeology in the solution of problems, which usually requieres not of mere praxeology, but of other sciences.