JSON_T_ARRAY_BEGIN      Symbolic constants identifying the type of a
                        JSON value.
asJSVars                Serialize R objects as Javsscript/ActionScript
                        variables
basicJSONHandler        Create handler for processing JSON elements
                        from a parser
fromJSON                Convert JSON content to R objects
isValidJSON             Test if JSON content is valid
readJSONStream          Read JSON from a Connection/Stream
toJSON                  Convert an R object to a string in Javascript
                        Object Notation