Shorthand notation
In a rule, a dollar sign ($) can be used to refer to the object to the left of the rule cell. In the schema designer, the $ sign refers to the object you are qualifying. In the map designer, the $ refers to the object to which the rule evaluates.
In certain cases, you can also use a period between colons to shorten the reference to a data object name. The Use Ellipses command can be used to automatically shorten data object names you drag into rule expressions.