Recall External Alignment command line defined

[rerun_lives]

Can anyone please break down the meaning of each section of this recall of an external alignment mean exactly?
Here is the command line:

RECALL/ALIGNMENT,EXTERNAL,1853-fixture,1853-FIX:1853-fixture

[Matthew D. Hoedeman]

Can anyone please break down the meaning of each section of this recall of an external alignment mean exactly?
Here is the command line:

RECALL/ALIGNMENT,EXTERNAL,1853-fixture,1853-FIX:1853-fixture

alignment ID from program that made the exteranl file
external alignment file
alignment ID (again) for use in this program

[rerun_lives]

Thank Matt