IETF RFC 7493 PDF

Introduction

RFC 7159 describes the JSON data interchange format, which is widely used in Internet protocols. For historical reasons, that specification allows the use of language idioms and text encoding patterns that are likely to lead to interoperability problems and software breakage, particularly when a program receiving JSON data uses automated software to map it into native programming‐language structures or database records. RFC 7159 describes practices that may be used to avoid these interoperability problems.

This document specifies I‐JSON, short for "Internet JSON". The unit of definition is the "I‐JSON message". I‐JSON messages are also "JSON texts" as defined in RFC 7159 but with certain extra constraints that enforce the good interoperability practices described in that specification.