'Changes' operator

This table shows the syntax for rules that use the 'Changes' operator:


Syntax	[Attribute] [Operator] [optional Condition]
Attribute	One of the document attributes selected for monitoring. See Monitor rule - value change.
Operator	Changes
Condition (optional)	A monitor condition from the list of predefined conditions. See Monitor rule - value change.
Evaluation if Operator = Changes	Evaluates to true if an instance of the document was received followed by a new instance of the same document, with a different value than the previous one. If a Condition is specified, only the document instances for which the Condition evaluates to True are considered for evaluation.

This table shows when alerts are generated:


Document instances	Alert is generated
First document instance contains the Attribute with any value.	No
Two document instances follow each other, each having a different value for the Attribute.	Yes
Two document instances follow each other, both having the same value for the Attribute.	No

Note: If several document instances are received with the same CreationDateTime, but different values for the Attribute, only one of the document instances is used in the evaluation. No alert is generated until a new document instance with a different CreationDateTime and a different attribute value is received.

Example - Changes

You can make changes to a planned Shipment. For example, another carrier is assigned. If this is a change to be alerted on, you can create a rule to monitor value changes on the carrier party from the Shipment document.

This table shows the syntax of the rule:


Attribute	CarrierParty
Old Value	N/a
Operator	Changes
New Value	N/a
Within	N/a