CREATE MODULE -> <module-name> +---------------------------------+-+
                                 +-> STORED NAME IS <stored-name> -+ |
  +------------------------------------<-----------------------------+
  +-+-------------------+---+----------------------------+-----------+
    +-> LANGUAGE SQL ---+   +-> AUTHORIZATION <auth-id> -+           |
  +------------------------------------------------------------------+
  ++---------------------------------+-+--------------------+--------+
   +-> COMMENT IS -+-> 'string' ---+-+ +-> declare-clause --+        |
                   +------ / <-----+                                 |
  +------------------------------------------------------------------+
  +-+-> routine-clause ---+--> END MODULE --->
    +-------- <-----------+

  declare-clause =

  --+-+-> declare-transaction-statement -----------+-+-->
    | +-> declare-local-temporary-table-statement -+ |
    | +-> declare-variable-statement --------------+ |
    +----------------------<-------------------------+

  routine-clause =

  -+> PROCEDURE <procedure-name> +-+-------------------> -----------++
   +> FUNCTION <function-name> --+ +> STORED NAME IS <stored-name> -+|
  +----------------------------------------- <-----------------------+
  +---+--------------------> ---------------------+---+
      +--> ( -+----------------------------+-- ) -+   |
              ++-> parameter-decl --------++          |
               +----------- , <-----------+           |
  +---------------------------------------------------+
  ++----------------------------++----------------------+---------+
   +> RETURNS result-data-type -++---> function-attr ---+         |
  +------------------------------------------ <-------------------+
  ++--------------------------------+-> ; -+-> compound-statement -----+> ; -->
   +> routine-attr -----------------+      +-> compound-use-statement -+
                                           +-> external-body-clause ---+

  parameter-decl =

  --+----------++---------------------++-> data-type -----+---+
    +-> IN ----++-> <parameter-name> -++-> <domain-name> -+   |
    +-> OUT ---+                                              |
    +-> INOUT -+                                              |
    +------------------------------<--------------------------+
    +-+---------------------+-+-----------------------+-------+
      +-> mechanism-clause -+ +-> DEFAULT value-expr -+       |
    +---------------------------------------------------------+
    +--+--------------------------------+------------------------->
       +-> COMMENT IS -+-> 'string' ---++
                       +------ / <-----+

  function-attr =

  -++--------+-+-> VARIANT -------++->
   |+-> NOT -+ +-> DETERMINISTIC -+|
   +--> LANGUAGE SQL --------------+

  routine-attr =

  --+-> COMMENT IS --+-> 'string' --+-+-->
    |                +------ , <----+ |
    +-> USAGE IS -+-> LOCAL ---+------+
                  +-> GLOBAL --+