Object operators

Object operators define conditions based on objects (as opposed to attributes of objects). A customer is an object; the age of the customer is an attribute of the customer object.

Table 1. Object operators
Operator Description Example
<object> is <object> Tests that two objects are equivalent. 
if
   the current customer is the customer on the rental agreement
then...
<object> is not <object> Tests that two objects are not equivalent. 
if
   the current customer is not the customer on the rental agreement
then...
<object> is one of <list> Tests that an object is part of a set. 
if
   the item of the order is one of 'discounted items'
then...
<object> is not one of <list> Tests that an object is not part of a collection. 
if
   the customer category is not one of ’all categories’
then...
<list> contain <object> Tests that a collection contains an object. This operator is functionally equivalent to <object> is one of <list>. 
if
   the customer categories contain Platinum
then...
   apply a 10% discount;
<list> do not contain <object> Tests that a collection does not contain an object. This operator is functionally equivalent to <object> is not one of <list>. 
if
   the customer categories do not contain Normal
then...
   apply a 10% discount;