Categorizing an object

An object may be categorized upon distribution of the object from a sender system to a recipient system. The object may be assigned to at least one recipient category in a recipient category hierarchy according to a first predefined mapping from a sender category hierarchy to the recipient category hierarchy. The object is initially assigned to a sender category in the sender category hierarchy. There is applied to the object a second predefined mapping from the recipient category hierarchy to the sender category hierarchy. It is determined whether the first and second predefined mappings converge. If the first and second predefined mappings do not converge, there may be executed a rule-based reassignment algorithm to make the first and second predefined mappings converge.