Revision date and time of data in file
Revision date: 20140121143000
Revision date: YYYYMMDDHHMMSS
This line states date and time when the file was created or changed
last. The date needs to be the same as the one stated in line 7.
In the present line however, not only the revision date, but also the
revision time is given, which is important for larger, almost
simultaneously generated file collections or near-real-time