The period (.) symbol ends all statements, including block header statements. The DO, FOR, and REPEAT statements can end with a period or a colon.
An ABL package or .NET namespace and the name of a class or interface defined in that package or namespace, for example,
Progress.Lang.Error,
Progress.Windows.Form, or
System.Collections.SortedList
See
: Punctuation for rules to help you decide whether to use period, colon, or double colon syntax.