The following rules apply:
- The PICTURE character-string can contain only the symbol 1.
- Only one character 1 can be specified.
- The USAGE of an item can only be DISPLAY.
- An associated VALUE clause must specify a Boolean literal (B"1"
or B"0") or zero.
- The following clauses cannot be specified for a Boolean item:
- SIGN clause
- BLANK WHEN ZERO clause
- ASCENDING/DESCENDING KEY clause.
- The INDICATOR clause can be specified.
(See the IBM Rational Development Studio for i: ILE COBOL Programmer's Guide for more information about indicators.)