You can create a service provider application from a JSON schema that complies with JSON schema v4 (draft), or from a high-level language data structure. The CICS® JSON assistant helps you to deploy your CICS applications in a service provider setting.
Use this option when you want to implement a service provider that conforms with an existing web service description.
Use this option when you want to expose an existing program as a JSON service and are willing to expose aspects of the program interfaces in the JSON schema and messages.