Declare OnChange rules - Completing the New or Save As form

A Declare OnChange rule has two key parts.

Field	Description
Type	Select `Declare OnChange` from the `Decision` category.
Applies To	Select a class for this rule. At runtime, a clipboard page of this class must be a top-level page. The properties to be watched may be in this class (or in the class of an embedded page). You cannot use a Rule-Declare-* class or any ancestor of the Rule-Declare- class (including @baseclass) here. You cannot use a class derived from the Code- or Embed- class here.
Purpose	Enter a unique name for this OnChange rule within the class. Begin the name with a letter and use only alphanumeric, ampersand, and dash characters. No other rules explicitly reference this Purpose value. However, because of normal class inheritance, a Declare OnChange rule named OutofStock at one level in the class structure may override (and so prevent execution of) a Declare OnChange rule named OutofStock at a higher level in the class structure.

For general information on the New form, see Completing the new rule dialog box. For general information on the Save As form, see How to enter rule keys using Save As.

When searching for Declare OnChange rules, the system:

Filters candidate rules based on a requestor's RuleSet list of RuleSets and versions
Searches through ancestor classes in the class hierarchy for candidates when no matching rule is found in the starting class

Time-qualified and circumstance-qualified rule resolution features are not available for Declare OnChange rules.

Declare OnChange rules Completing the New or Save As form