HP-UX Routing Services Administrator's Guide HP-UX 11i v2, HP-UX 11i v3 (B2355-91153, November 2011)

Variable The name of a variable that you may replace in a command or function or
information in a display that represents several possible values.
[ ] The contents are optional in formats and command descriptions. If the contents
are a list separated by |, you can choose one of the items.
{} The contents are required in formats and command description. If the contents
are a list separated by |, you must choose one of the items.
(Ctrl+A) This symbol indicates that you hold down the first named key while pressing
the key or mouse button that follows the plus.
Bold The defined use of an important word or phrase.
... The preceding element can be repeated an arbitrary number of times.
| Separates items in a list of choices.
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