Patent ID: 8577760

Claim:
A non-transitory computer readable medium including program code for providing a message-based interface for performing a tax form 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 querying a tax form by levy type, the tax form operable to be filled by a taxpayer or the taxpayer's representative, where a tax return or tax registration is comprised of a plurality of tax forms, the first message derived from the common business object model and including a first message package hierarchically organized as: a tax form enterprise resource planning (ERP) by levy type query message entity; and a selection package, the selection package including a tax form selection by levy type entity, the tax form selection by levy type entity including a levy type code and a tax form usage code; 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.