Presented are a system and method for sharing data objects among applications. Included is a data protocol layer that permits a flow of data messages among the applications, where a portion of the data messages include data objects stored in a data store. A client library is coupled between the applications and the data protocol layer. A data request module associated with each client library requests data objects from the data stores that match a particular data-object set. A management server receives the request, parses the request, retrieves any matching data objects, and causes the return of the any matching data objects to the data request module. Associated with the management server is a registration module that accepts subscriptions from subscribing applications. An event notification module associated with the management server compares a data object in a data message with the subscriptions, and notifies the subscribing applications in response.