1.1.6 Symbols used in command usage description
The following table lists the symbols used in the description of command usage.
Symbol |
Meaning |
---|---|
| |
Only one of the options separated by a vertical bar can be used at one time. Example:
|
{ } |
One of the items enclosed in braces and separated by a vertical bar must be specified. Example:
|
[ ] |
The item or items enclosed in brackets are optional. When multiple items are listed, choose one or omit all. Example:
|
... |
The item or items preceding the ellipsis (...) can be repeated. Example:
|
_ (underline) |
The underlined characters are the system default when you omit all the items enclosed in brackets. If there is no default, only the specified item will take effect. Example:
|