anchor.diff:  	;
   
   /*
  -	| INTERVAL | INTO | IS
  +	| INTERVAL | 
  +*/
  +
  +INTO
  +	: I N T O
  +	;
  +
  +/*
  +	 | IS
   	| ISOLATION
   	| JOIN
   	| KEY
  
positive.code: 	: GENERAL_LITERAL
  	;
  
  GENERAL_VALUE_SPECIFICATION ::=
  	: PARAMETER_SPECIFICATION
  	| DYNAMIC_PARAMETER_SPECIFICATION
  	| VARIABLE_SPECIFICATION
  
negative.code: 
  STATUS_PARAMETER ::=
  	SQLCODE | SQLSTATE
  */
  
  SQL_PROCEDURE_STATEMENT
  /*
  	  SQL_SCHEMA_STATEMENT
  */
  	: SQL_DATA_STATEMENT
  /*
  	| SQL_TRANSACTION_STATEMENT
  	| SQL_CONNECTION_STATEMENT
  	| SQL_SESSION_STATEMENT
  	| SQL_DYNAMIC_STATEMENT
  	| SQL_DIAGNOSTICS_STATEMENT
  */
  	;
  
  /*
  SQL_SCHEMA_STATEMENT ::=
  	  SQL_SCHEMA_DEFINITION_STATEMENT
  	| SQL_SCHEMA_MANIPULATION_STATEMENT
  