1. A service definition document (SDD) framework for defining blended service software applications that utilize multiple service endpoints, the SDD framework comprising: a first category of the SDD, wherein the first category of the SDD defines a service endpoint representing a blended service; a second category of the SDD, wherein the second category of the SDD defines a plurality of other service endpoints utilized by the blended service; and a third category of the SDD, wherein the third category of the SDD defines execution of the blended service.