This relationship type is used with the Integration for Content Composer.
The following pertains to relating message items to Content Composer bundles.
When the Content Type is set to Message Items and the Related Content Type is set to Content Composer Bundle, the wizard prompts you for the Message Item Type.
Select the Message Item Type you want to create a relationship for from the drop-down list. This is the message item type that the message belongs to.
When the Related Content Type is set to Content Composer Bundle, the Content Composer Profile, System, and Bundle options are available to find related information.
Select the Content Composer Profile, Content Composer System, and Content Composer Bundle you want to use to define a relationship for from the drop-down list.