1. A non-transitory computer readable medium including program code for providing a message-based interface for exchanging comprehensive merchandise information, including product, bill of material, configuration, sales price information and purchase price information, the medium comprising: program code for receiving via a message-based interface derived from a common business object model, where the common business object model includes business objects having relationships that enable derivation of message-based interfaces and message packages, the 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 information for a comprehensive merchandise view for a product including bill of material, configuration, sales price information and purchase price information that includes a first message package derived from the common business object model and hierarchically organized as: a merchandise enterprise resource planning (ERP) replication bulk request message entity; and a merchandise ERP replication request message package comprising a merchandise ERP replication request message entity and a merchandise package, the merchandise package comprising a merchandise entity and a receiving store package, where the merchandise entity includes an internal identifier (ID), and where the receiving store package includes at least one receiving store entity, where each receiving store entity includes a store internal ID; and program code for processing the first message according to the hierarchical organization of the first message package, where processing the first message includes unpacking the first message package based on the common business object model; and program code for sending a second message to the heterogeneous application responsive to the first message, where the second message includes a second message package derived from the common business object model to provide consistent semantics with the first message package.