is equal to

Select is equal to to evaluate the relationship between two sides of a conditional statement. Either side can typically be the content returned by a resource attribute, value, or arithmetic expression. If the resource attribute is of the data type List (array, vector, or enumeration), the available evaluations become includes and includes any of. Otherwise, the choices are:

• includes
• includes any of
• is between
• is between but not equal to
• is empty
• is equal to
• is greater than
• is greater than or equal to
• is included in
• is less than or equal to
• is less than
• is not empty
• is not equal to

Is Empty/Is Not Empty

The evaluations is empty and is not empty allow a rule to check for the existence of a null value or an empty list. When using either of these evaluations, the right side of the evaluation is unnecessary and is removed.

Left side of Evaluation	Evaluation	Result
Resource Attribute (non-list type)	is empty	true if attribute is null, otherwise false
	is not empty	false is attribute is null, otherwise true
Resource Attribute (list type)	is empty	true if list is empty, otherwise false
	is not empty	false if list is empty, otherwise true
Request Attributes or Session Attributes (non-list type)	is empty	false if attribute/parameter exists and value is not null; true if attribute/parameter does not exist or value is null
	is not empty	true if attribute/parameter exists and value is not null; false if attribute/parameter does not exist or value is null
Request Attributes or Session Attributes (list type)	is empty	true if attribute/parameter does not exist or list is empty; false if attribute/parameter exists and list has data
	is not empty	false if attribute/parameter does not exist or list is empty; true if attribute/parameter exists and list has data