As part of the support for Aggregation and Composition, CentraSite allows the relationship form to be changed after the type is created. This change affects all current instances and new instances. This means that after a relationship attribute is created, the form (for association the default form, for aggregation (both forms, that is, "using source" and "using target") and for composite (both forms)) can be changed by an Asset Type Administrator. From that point onwards, the appropriate rules will be applied when performing the defined operations.