The next parenthesized sub-expression is very similar to the one above.
The first parenthesized group ([w]+) matches the tag name for use later in the regular expression.
In PL / 1, a parenthesized list of one or more arguments, separated by commas, following an entry - name constant, an entry - name variable, a generic name, or a built - in function list is passed to the parameters of the entry point.
