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+=============================================================================
+                             Introduction
+=============================================================================
+  Jansson is a C library for encoding, decoding and manipulating JSON data.
+Its main features and design principles are:
+
+  - Simple and intuitive API and data model
+  - Comprehensive documentation
+  - No dependencies on other libraries
+  - Full Unicode support (UTF-8)
+  - Extensive test suite
+
+  Jansson is licensed under the MIT license(refer to ReadMe.rst under edk2).
+It is used in production and its API is stable. It works on numerous
+platforms, including numerous Unix like systems and Windows. It's suitable
+for use on any system, including desktop, server, and small embedded systems.
+
+  In UEFI/EDKII environment, Redfish project consumes jansson to achieve JSON
+operations.
+
+* Jansson version on edk2: 2.13.1, API reference is on the below URL,
+  https://jansson.readthedocs.io/en/2.13/apiref.html
+
+* EDKII jansson library wrapper:
+   - JsonLib.h:
+     This is the denifitions of EDKII JSON APIs which are mapped to
+     jannson funcitons accordingly.
+
+*Known issue:
+   Build fail with jansson/src/load.c, add code in load.c to conditionally
+   use stdin according to HAVE_UNISTD_H macro. The PR is submitted to
+   jansson open source community.
+   https://github.com/akheron/jansson/pull/558
+
+