A data management system includes a first consistency zone, a second consistency zone, and a repository manager. The repository manager identifies a calculation event for a derived object of the second consistency zone, the derived object includes a cross-zone reference to the first consistency zone; and in response to identifying the calculation event: identifies an object in the first consistency zone associated with the cross-zone reference; sends a remote object request, to the first consistency zone, for the object with reference to an event of the first consistency zone specified by the cross-zone reference; obtains the object after sending the remote object request; and obtains a derived object instance based, at least in part, on a computation specification of the derived object and the object.