1. A computer-implemented method, comprising: receiving a request with a first business application, the request associated with a data object instance of a specific data object type assigned to a second business application, wherein the second application is a master business application; identifying, by operation of a computer comprising at least one processor, the second business application as the assigned master business application associated with the requested data object instance, wherein the first business application and the second business application are based on a common application platform, and wherein the second business application locks the requested data object instance from modification by business applications other than the first business application and provides a data connection to the first business application; and receiving access from the second business application to data associated with the requested data object instance, wherein the second business application: opens the data connection between the first business application and the second business application; permits access to the data object instance data; and unlocks the data object instance upon termination of access by the first business application.