OBJECT ::= "{" {MEMBERS} "}"
     MEMBERS ::= PAIR {"," MEMBERS}
        PAIR ::= VALUE ":" VALUE
       ARRAY ::= "[" ELEMENTS "]"
    ELEMENTS ::= VALUE {"," ELEMENTS}
       VALUE ::= null
               | BOOL
               | NUMBER
               | STRING
               | OBJECT
               | ARRAY
        BOOL ::= true | false
      NUMBER ::= byte | ubyte | short | ushort | int | uint | long | ulong | single | double
      STRING ::= double_quote charactors double_quote | charactors

           COMMAND ::= SELECT_CLAUSE
                     | FROM_CLAUSE
                     | INSERT_CLAUSE
                     | DELETE_CLAUSE
                     | UPDATE_CLAUSE
                     | CREATE_CLAUSE
                     | OPEN_CLAUSE
                     | CLOSE_CLAUSE
                     | SYNC_CLAUSE
                     | PUSH_CLAUSE
                     | POP_CLAUSE
                     | PEEK_CLAUSE
     SELECT_CLAUSE ::= ("select" | "SELECT") PATH
       FROM_CLAUSE ::= ("from" | "FROM") ARRAY
                       [WHERE_CLAUSE]
                       SELECT_CLAUSE
                       [ORDERBY_CLAUSE]
      WHERE_CLAUSE ::= ("where" | "WHERE") EXPR
    ORDERBY_CLAUSE ::= ("orderby" | "ORDERBY") PATH
     INSERT_CLAUSE ::= ("insert" | "INSERT") PATH
                       [WHERE_CLAUSE]
                       VALUE_CLAUSE
     DELETE_CLAUSE ::= ("delete" | "DELETE") PATH
                       WHERE_CLAUSE
     UPDATE_CLAUSE ::= ("update" | "UPDATE") PATH
                       WHERE_CLAUSE
                       VALUE_CLAUSE
     CREATE_CLAUSE ::= ("create" | "CREATE") [VARIABLE "="] datatree_source_text
      VALUE_CLAUSE ::= ("value" | "VALUE") datatree_value_text {"," datatree_value_text}
       OPEN_CLAUSE ::= ("open" | "OPEN") file_path
      CLOSE_CLAUSE ::= ("close" | "CLOSE")
       SYNC_CLAUSE ::= ("sync" | "SYNC") [file_path]
       PUSH_CLAUSE ::= ("push" | "PUSH") var_name
        POP_CLAUSE ::= ("pup" | "POP") var_name
       PEEK_CLAUSE ::= ("peek" | "PEEK") var_name
              PATH ::= PATH_NODE {"," PATH_NODE}
             ARRAY ::= PATH
         PATH_NODE ::= datatree_value_text "=" PATH
                     | [VARIABLE] | ["." datatree_value_text | "<" datatree_object_member_index ">" | "<" datatree_array_index ">"]
              EXPR ::= datatree_value_compare_expression
          VARIABLE ::= "$" datatree_variable