If you have chosen
the item “key dataset” in the selection area for key input, the “folder” symbol
is shown on the left
side of the key input field.
To enter an existing dataset and its path information
into the key input field, you can click on the “folder” symbol
on the left side,
choose a dataset, and click on the “Open” button of the dataset choose
dialogue. Afterwards you can still edit the name in the input field as you
like.
To help you especially by entering long dataset
names, the program displays the place of the cursor or the range of places
being marked at the left side of the status bar being at the bottom of the
input mask.
If the key dataset field isn’t selected i.e.
hasn’t the focus, the field information is displayed as stars. If the key
dataset field is selected, the contents of this field only is visible if the
mouse pointer is located or moved in the central region of this field. If the
mouse pointer slowly leaves the central region of this field, then the
information is hidden. Regardless of that marked field parts are always
visible.
Use key datasets if you have a complex or randomised
key. A key dataset used by the current program task is n o t
processed in this task (so not destroyed as well), even if this dataset
is explicitly or implicitly addressed as a dataset to be processed (see exception dataset about that).
Please notice that line end characters in datasets
comprising an ASCII key are interpreted as components of the key too.