This library is implemented JSON Pointer
(http://tools.ietf.org/html/rfc6901) and some useful operator from
JSON Patch (http://tools.ietf.org/html/rfc6902).

JSON Pointer is available to identify a specified value in JSON
document, and it is simillar to XPath.  Please read the both of
specifications for details.

WWW: http://search.cpan.org/dist/JSON-Pointer/