Here is a list of all documented files with brief descriptions:

fisx_beam.h
fisx_defaultelementsinfo.h
fisx_detector.h
fisx_element.h
fisx_elements.h	Elements properties
fisx_epdl97.h
fisx_layer.h
fisx_material.h
fisx_math.h
fisx_shell.h
fisx_simpleini.h
fisx_simplespecfile.h
fisx_transmissiontable.h
fisx_version.h
fisx_xrf.h
fisx_xrfconfig.h