Syntax notation in message text

In this document, VTAM® messages are described with the following syntax notation:
UPPERCASE CHARACTERS
Represent the actual text of the message.
italic characters
Represent message variables. The variables are replaced by their values in the actual message.
Braces { }
Represent a group of text strings, only one of which is displayed in the actual message. The text strings are separated by or-signs (|) in the braces.

The braces and or-signs are not displayed in the actual message.

Brackets [ ]
Represent optional messages or optional parts of a message. Optional messages or optional parts of a message are displayed only under certain circumstances which are described in the "Explanation" section of the message. If an optional part has more than one possible value, or-signs separate the possibilities.

The brackets and or-signs are not displayed in the actual message.