This Data Record Has Been Withdrawn. The description is retained for backwards compatibility.

This data record is used to delete an existing frequency/period and its associated parameters, within data read from a backing file, from a previous run, in order to specify an additional frequency (with a FREQ/PERD/HRTZ data record), or to move/copy other parameters to this position (with a MVEF/CPYF/CPYP/CPYH data record), which would otherwise violate rules (c) or (d) in The FREQ/PERD/HRTZ Data Record - Frequencies/Periods at which the Hydrodynamic Parameters are Computed.

If periods are input, read period for frequency in this section.

      2   5  7   11    16
    - --- -- ---- ----- -----
   |X|   |  |DELF|XXXXX|     |
    - --- -- ---- ----- -----
       |  |   |           |
       |  |   |           |
       |  |   |           |_Number of Frequency and Associated
       |  |   |             Parameters which are to be Deleted(I5)
       |  |   |
       |  |   |_Compulsory Data Record Keyword(A4)
       |  |
       |  |_Optional User Identifier(A2)
       |
       |_Compulsory END on Last Data Record in Data Category(A3)

Rules for Using the DELF Data Record

(a) The frequency number must lie in the range 1 through 100 (the maximum number of frequencies) inclusive.

(b) The frequency and parameters to be deleted must exist (i.e. they must have been read in from the backing file).

(c) The frequency should not be the ONLY existing frequency, as the directions associated with this frequency and structure then become undefined. The directions must then be redefined using a DIRN data record.