1. A tangible, non-transitory computer readable medium including program code for providing a message-based interface for exchanging information about financial instrument impairment to attribute values analytical results, 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 querying financial instrument impairment to attribute values analytical results by using selection elements, including information used in determining impairment to specific status and other attribute values of individual financial instruments, the first message including a first message package hierarchically organized based on and derived from the common business object model, the hierarchical organization of the message package including: at a first hierarchical level in the first message package, a financial instrument impairment to attribute values analytical result financial systems by elements query message entity; at the first hierarchical level in the first message package, a selection package and a processing conditions package, wherein the selection package includes, at a second hierarchical level in the first message package, a financial instrument impairment to attribute values analytical result selection by elements entity, wherein the financial instrument impairment to attribute values analytical result selection by elements entity includes, at a third hierarchical level in the first message package, a set of books identifier (ID), and wherein the processing conditions package includes, at the second hierarchical level in the first message package, a processing conditions entity; 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 on the hierarchical organization of the first message package and the first message package's deriviation from the common business object model, wherein the particular hierarchical organization 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.