Abstract: A unifying domain model for Internet business systems is described that includes an authoritative definition of logical objects that make up a modern Internet business system, a canonical list of attributes associated with such objects, a specification of how such objects may be composed and may relate to one another, and what operations or actions may be taken on or provided by them. A middleware framework is also described that brokers communication between end-user applications that are designed to consume the aforementioned objects and various integrated systems that are not so designed, such as LOB systems and partner systems, wherein brokering communication may include performing a translation between a representation of the data and operations utilized by an integrated system and the unifying domain model utilized by the end-user applications during runtime of the end-user applications.