This task controls
the level of history recording
in an NDF
, and can also erase the history
The level is called the history update mode and it is a permanent attribute
of the HISTORY component of the NDF, and remains with the NDF and any NDF
created therefrom until the history is erased or the update mode is modified
(say by this task).
hisset ndf [mode] ok=?
The history update mode. It can take one of the following
"Disabled" –- No history recording is to take place.
"Erase" –- Erases the history of the NDF.
"Normal" –- Normal history recording is required.
"Quiet" –- Only brief history information is to be recorded.
"Verbose" –- The fullest-possible history information is to be recorded.
The suggested default is
NDF = (Read and Write)
The NDF whose
history update mode to be modified or history information erased.
OK = _LOGICAL
This is used to confirm whether or not the history should be erased. OK=
lets the history records be erased; if OK=
FALSE the history is retained and a message
will be issued to this effect.
hisset final This sets the
history-recording level to be normal for the NDF called final.
hisset final erase ok
This erases the history information from the NDF called final.
ndf=spectrum This disables history recording in the NDF called spectrum.
hisset test42 v This sets the history-recording level to be verbose for the
NDF called test42 so that the fullest-possible history is included.
ndf=test42 mode=q This sets the history-recording level to be quiet for the
NDF called test42, so that only brief information is recorded.
A HISTORY component is created if it does not exist within the NDF, except for
The task records the new history update mode within the history records, even if
"Disabled" provided the mode has changed. Thus the history information will show
where there may be gaps in the recording.