Access to the library's functionality is provided by importing the fdf module:
use fdf
which exports the interfaces to the public user-level routines and other symbols.
It is necessary to call the fdf_init routine before any other operations. When working in parallel, only the master node has to call the routine (see this file for more information.
These perform queries and extract data from the FDF file, in accordance with the FDF specifications
A full example of list processing can be found here.