1.1.6 Symbols used in command usage description

|

Only one of the options separated by a vertical bar can be used at one time.

Example:

A|B|C

A, B, or C

{ }

One of the items enclosed in braces and separated by a vertical bar must be specified.

Example:

{A|B|C}

Specify A, B, or C.

[ ]

The item or items enclosed in brackets are optional.

When multiple items are listed, choose one or omit all.

Example:

[A]

Specify A or nothing.

[B|C]

Specify B, C, or nothing.

...

The item or items preceding the ellipsis (...) can be repeated.

Example:

A, B, ...

After A, specify B as many times as necessary.

_

(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:

[A|B]

A is assumed if you do not specify either item.