operates in two phases: 1) read and parse the format file, and
2) process each message (file). During phase 1, an internal description
of the format is produced as a structured list. In phase 2, this list
operates in two phases: 1) read and parse the format file, and
2) process each message (file). During phase 1, an internal description
of the format is produced as a structured list. In phase 2, this list