This chapter concludes our discussion on the core compulsory SOA frameworks, presenting the last framework (ABCS according to AIA notations) and all the SOA patterns associated with it. This framework is also optional and probably even more undesirable for pure (theoretical) SOA, but it is still one of the most extensive and heavier layers in most technical infrastructures of modern enterprises. Why? Because of all the legacy applications enterprises have? Let's check our calendar—the concepts of unified standard contracts and canonical APIs (Official Endpoint, Canonical Schema, Canonical Expression, and Canonical Protocol SOA Patterns) weren't invented yesterday; they are more than ten years old and have been cornerstones of contemporary SOA since 1999. With an average lifespan of any core ERP/CRM/SCM bundle in an enterprise of about six years, all that dinosaurs requiring adapters for smooth plugging to the EBS framework (Service...