The naming rules for label names are as follows:
- Names must be 10 characters or less.
- The name can be enclosed in apostrophes (') and must be if the name
contains an opening brace '(', or a closing brace
')'.
- The first character must be alphabetic (A through Z, @, $, or
#).
- Subsequent characters can be anything except comma (,), or apostrophe
(').
(C) Copyright IBM Corporation 1992, 2005. All Rights Reserved.