Abstract: Example embodiments address current problems associated with changes in service contracts by providing automated mechanisms to update portions of an existing service implementation. For example, one mechanism modifies an implementation's skeleton (e.g., methods, method signatures, data structures, etc.) in order to conform to changes to an NPDL (e.g., WSDL) contract. In such an embodiment, the developer may only need to make the necessary changes, if any, to the business logic, which typically will not be known from the contract definition. Accordingly, such automatic modifications to the implementation facilitate a developer's adopting a contract based approach to web service development.

Abstract: Example embodiments address current problems associated with changes in service contracts by providing automated mechanisms to update portions of an existing service implementation. For example, one mechanism modifies an implementation's skeleton (e.g., methods, method signatures, data structures, etc.) in order to conform to changes to an NPDL (e.g., WSDL) contract. In such an embodiment, the developer may only need to make the necessary changes, if any, to the business logic, which typically will not be known from the contract definition. Accordingly, such automatic modifications to the implementation facilitate a developer's adopting a contract based approach to web service development.

Abstract: Methods and apparatus are provided for defining a contract for a web service. The contract may be defined, for example, in Web Service Definition Language (WSDL) or SOAP Service Description Language (SSDL) format. According to one embodiment of the invention, a software application is provided which implements one or more rules or assumptions to limit the functionality of a web service which the contract defines, such that a user interface provided by the application is less visually confusing to the user than conventional interfaces and the user may define the contract in a more intuitive manner.