Yojson: JSON library for OCaml

The main project page is http://mjambon.com/yojson.html Yojson supersedes json-wheel.

Design goals

reducing inter-package dependencies by the use of polymorphic variants for the JSON tree type
allowing variants of the JSON tree type to be shipped by the library itself or to be easily created as extensions of the library
allowing type-aware serializers/deserializers such as json-static to read and write directly without going through a JSON tree, for efficiency purposes. This requires making readers and writers of JSON atoms (int, string, etc.) to be exported and composable.
providing a few non-standard, optional extensions of JSON. These extensions will include:
- optional quotes around "simple" field/constructor names
- a syntax for tuples (at least 2 elements): (x, y)
- a syntax for variants (0 or 1 arg only): Bar:"abc"

distinction between ints and floats (optional)
Getting rid of the UTF-X encoding constraint that prevents from exchanging binary data:
- encoding is ASCII except for the contents of string literals
- string literals may represent arbitrary sequence of bytes
- \uABCD escapes in string literals expand to UTF-8