The following symbols serve as token separators in ZPL.
: .. , ; .
The use of colons (:) is described in Section 4.2.
When declaring variables, the colon separates variable names from their
types. The use of dots (..) and commas (,) is shown in
Sections 3.3.3 and 3.5. These dots separate
the lower and upper bounds of an array dimension, and the comma separates
the items in a list of dimensions. The semicolon (;) is a statement
terminator: All ZPL statements end with a semicolon. Finally,
Section 3.3.1 describes how the period (.) is used to
specify fields of a record variable.