T=Time Keys

The indexed file (I in position 35) defined on this line is processed by time keys. The T entry must agree with the data format of the field identified as the key field (length in positions 29 to 33 and starting position specified as the parameter to the KEYLOC keyword).

The hierarchy used when determining the format and separator for the time key is:

  1. From the TIMFMT keyword specified on the file description specification
  2. From the TIMFMT keyword specified in the control specification
  3. *ISO

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