impnetopts ::= 
 
[ ESTIMATE = {BLOCKS | STATISTICS}
| { FLASHBACK_SCN = scn_number | FLASHBACK_TIME = timestamp }
| { TRANSPORTABLE = {ALWAYS | NEVER} | TRANSPORT_TABLESPACES = tablespace_name [,...] }
   TRANSPORT_DATAFILES=datafile_name
| [TRANSPORT_FULL_CHECK = {Y | N}]
]