fortran function lib'$addx
    param
	a:	in ref long_integer
	b:	in ref long_integer
	result:	out ref general
	len:	optional in ref long_integer
    endparam
    returns result: long_cardinal
endfunction

fortran function lib'$analyze_sdesc
    param
	inp_dsc:	in ref descriptor
	len:		out ref word_integer
	data_adr:	out ref long_cardinal
    endparam
    returns result: long_cardinal
endfunction

----------------------------------------------
[]		optional


access		Praxis passing mode
---------------------------------------------
read only	in
write only	out
read/write	inout


mechanism			Praxis passing mechanism
----------------------------------------------
by value			val
by reference			ref
by descriptor			ref descriptor
by reference, array reference	ref general

type				Praxis type to use
-------------------------------------------------------------------
longword integer (signed)	long_integer
longword integer (unsigned)	long_cardinal
word integer (signed)		word_integer
word integer (unsigned)		word_cardinal
byte integer (signed)		byte_integer
byte integer (unsigned)		byte_cardinal