1. A computer readable medium including program code for providing a message-based interface for exchanging information for employee master data replication requests the medium comprising: program code for receiving via a message-based interface exposing at least one service as defined in a service registry and from a heterogeneous application executing in an environment of computer systems providing message-based services, a first message for providing a request to replicate fundamental employee master data that includes a message package hierarchically organized as: an employee fundamental master data replicate request message entity; and an employee fundamental master data replicate request package comprising an employee fundamental master data replicate request entity, where the employee fundamental master data replicate request entity comprises at least one fundamental data entity, where each fundamental data entity includes an employee identifier (ID), an employee leaving date, a work agreement termination dismissal indicator and an organisational centre remote object ID; and program code for sending a second message to the heterogeneous application responsive to the first message.