The Rule option on the Element menu of the Mapping window allows you to attach a rule to an element. There are three choices on the Rule submenu:
Prior rules – performed before the element is mapped.
Post rules – performed after the element is mapped. Post rules are generally used for inbound maps.
Remove – removes a rule that was previously attached to the element.
On inbound transaction maps, rules attached to an element are not performed if the element does not contain data.
Attaching a rule to an element
Do one of the following:
Highlight the element, choose Element>Rule>Prior or Element>Rule>Post.
Right-click the element, choose Rule>Prior or Rule>Post from the drop-down list.
The Rule Definitions pane is superimposed over the application data.
Drag a rule and drop it onto the element.
To remove a rule from an element
Right click the element and choose Rule>Remove drop-down list.