an equal sign identifies a value for a literal in some language elements such as
system options.
In this example of the MAPS system option, the equal sign sets the value of MAPS:
MAPS=location-of-maps
< >
angle brackets identify optional arguments. A required argument is not enclosed in
angle brackets.
In this example of the CAT function, at least one item is required:
CAT (item-1 <, item-2, …>)
|
a vertical bar indicates that you can choose one value from a group of values. Values
that are separated by the vertical bar are mutually exclusive.
In this example of the CMPMODEL= system option, you can choose only one of the
arguments:
CMPMODEL=BOTH | CATALOG | XML
...
an ellipsis indicates that the argument can be repeated. If an argument and the ellipsis ...
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