Empty list constructor
You use this construct to generate an empty list.
Purpose
You can use this construct as the default rule for multi-valued nodes.
Syntax
an empty list of <type>Example
Take the example of a multi-valued decision node of type string. If one or more
rules are applicable, a list of string values is returned. However, if no rule is applicable, the
decision node will be undefined. You can create a default rule to return an empty list instead of an
undefined value. You define the default rule as follows:
set decision to an empty list of strings;