Chapter 5 Designing the integration Layer Mutual Memorandum of Understanding (MOU) Service contracts or an MOU are useful before developing integration services, so as to ensure QoS, security, and scalability of services. Initially, the MOU was defined with a SOAP interface. Several frameworks and tools supported SOAP, but nowadays after the increasing popularity of Restful services, Swagger is becoming the most vital standard for defining, implementing, discovering, and testing REST services. Swagger-enabled API provides interactive documentation and software developer’s kit (SDK) generation capabilities. Service Protocol and Data Format While developing services, you should check the service communication endpoints, for example, HTTP endpoints for HTTP protocol-based applications; JMS endpoints for JMS applications; machine-to-machine (M2M) data transfer protocol (MQTT) endpoints for MQTT-based applications; and data format, for example, XML and JSON requirements. API Management API gateways are used to manage API. You have to consider the requirement, whether services are developed to use within the application or would be used by multiple applications across an organization. Why Do We Need Data Transformation Capabilities in DXP? In a business organization there are multiple applications interacting with each other, therefore the data will be organized and structured in different forms. For example, old systems are built on SOAP architecture but a DXP consumes REST services; hence, to make an old system compatible with a new modernized system, we need data transformation capabilities, whereas the DXP integration layer is capable of integrating with other systems irrespective of technology and framework. The DXP integration layer is capable of consuming data in any format and converts the data as per the DXP UI 167