Abstract: An electronic message, containing a request to initiate a service, can be received in a landscape of computer systems providing message-based services. Thereafter, a contract can be accessed to determine if provision of the requested service is permitted. As a result, the requested service identified in the message if provision of the requested service is permitted can be initiated. Related techniques, articles, apparatus, and systems are also described.

Abstract: Methods and apparatus, including computer program products, are provided for providing a language for defining a service. In one embodiment, there is provided a method for making a call to the service having a business object. Moreover, the method may include formatting a message based on a language, the language defining an interaction with the business object at the service and an association between the business object and a business object node, the association enabling an instantiation of the business object including the business object node; and calling the service using the formatted message, such that the formatted message instantiates the business object.