HP Serviceguard Toolkit for Oracle Data Guard manual Replaceable

Replaceable	The name of a placeholder that you replace with an actual value.
[ ]	In command syntax statements, these characters enclose optional
	content.
{ }	In command syntax statements, these characters enclose required
	content.
	The character that separates items in a linear list of choices.
...	Indicates that the preceding element can be repeated one or more
	times.
WARNING	An alert that calls attention to important information that, if not
	understood or followed, results in personal injury.
CAUTION	An alert that calls attention to important information that, if not
	understood or followed, results in data loss, data corruption, or
	damage to hardware or software.
IMPORTANT	An alert that calls attention to essential information.
NOTE	An alert that contains additional or supplementary information.
TIP	An alert that provides helpful information.

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