Compile options:	      |		encode output |	decode input	|
------------------------------+-----------------------+-----------------|
ber (default)		      |		flat list     | flat list,binary|
ber_bin			      |		iolist	      | binary		|
ber_bin,optimize	      | 	iolist	      | binary		|
ber_bin,optimize,driver	      | 	iolist	      | iolist,binary	|
per			      | 	flat list     | flat list       |
per_bin			      | 	deep list     | binary	        |
per_bin, optimize	      | 	binary	      | binary	        |
------------------------------+-----------------------+-----------------+   
								         
								            



iolist: deep list with binaries and lists as components