RESTful Java Web Services - Third Edition

Understanding the JSON Pointer

Similar to XPATH for XML processing, JSON Pointer is used to reference a specific value within a JSON document. JSON Pointer is intended to be easily expressed in JSON string values as well as URI RFC3986 fragment identifiers:

Syntax type	Syntax
String	Unicode string containing a sequence of zero or more reference tokens, each prefixed by a '/' (%x2F) character. Because the characters, '~' (%x7E) and '/' (%x2F), have special meanings in JSON Pointer, '~' needs to be encoded as '~0' and '/' needs to be encoded as '~1' when these characters appear in a reference token.
URI	A JSON Pointer can be represented in a URI fragment identifier by encoding it into octets using UTF-8 RFC3629, while percent-encoding ...