JavaScript Object Notation (JSON) is a language-independent data format that is used for serializing structured data and exchanging this data over a network, typically between a server and web applications. JSON provides a text-based way of representing JavaScript object literals, arrays, and scalar data. For more information, see the chapter about JSON in Oracle XML DB Developer's Guide.
Oracle Text Reference for information about the json_enable variable of SET_SEC_GRP_ATTR to enable JSON awareness for a CONTEXT index