1. A non-transitory computer readable medium including program code for providing a message-based interface for performing a financial instrument exposure profile analytical result service, 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 requesting creation of a financial instrument exposure profile analytical result, where the financial instrument exposure profile analytical result comprises an analytical result of an exposure profile calculation of a financial instrument, the first message including a first message package derived from the common business object model, the first message package hierarchically organized in memory, the hierarchical organization of the first message package including: at the first hierarchical level within the first message package, a financial instrument exposure profile analytical result create request message entity; and at the first hierarchical level within the first message package, a financial instrument exposure profile analytical result package, where the financial instrument exposure profile analytical result package includes, at a second hierarchical level within the first message package, a financial instrument exposure profile analytical result entity, where the financial instrument exposure profile analytical result entity includes, at a third hierarchical level within the first message package, an identifier (ID), a group ID, a key date, and a creation date time; program code for processing the first message based on the hierarchical organization of the first message package, where processing the first message includes unpacking the first message package based the first message package's structure and the first message package's derivation from on the common business object model, wherein the particular structure of the first message package is used at least in part to identify the purpose of the first message; 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.