1. A method comprising: receiving a data object from a sender computer system via an electronic communication, the data object being assigned to a first category of a sender category hierarchy stored in a memory of the sender computer system; identifying a first predefined mapping, the first predefined mapping including a mapping of the first category of the sender category hierarchy to a first category of a recipient category hierarchy stored in a memory of a recipient computer system, categories of the sender category hierarchy being different from categories of the recipient category hierarchy; identifying a second predefined mapping, the second predefined mapping including a mapping of the first category of the recipient category hierarchy to a second category of the sender category hierarchy; based on the first category of the sender category hierarchy being different from the second category of the sender category hierarchy: identifying a second category of the recipient category hierarchy, the second category of the recipient category hierarchy having a predefined mapping from the second category of the recipient category hierarchy to the first category of the sender category hierarchy, the identifying of the second category of the recipient category hierarchy based on repeatedly reassigning the data object to categories of the recipient category hierarchy until a convergent mapping is found; overriding the first predefined mapping to assign the object to the second category of the recipient system to assign the data object to the second category of the recipient category hierarchy instead of the first category of the recipient category hierarchy; and sending the data object to the recipient computer system via an additional electronic communication.