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Appendix D. Using JSON formatting

In this appendix, we discuss JavaScript Object Notation (JSON). JSON is an often-used way to format the data exchanged by apps in the HTTP request and response when using REST endpoints to communicate (figure D.1). Because REST endpoints are one of the most encountered ways to establish communication between apps, and JSON is the main way to format the data exchanged, understanding and knowing how to use JSON formatting is essential.

Figure D.1 When you implement business logic, it sometimes implies establishing communication between multiple apps. Most often, you use JSON to format the data the apps exchange. ...