anchor.diff:  CATCH: C A T C H;
   FINALLY: F I N A L L Y;
   ENDTRY: E N D T R Y;
  +BROWSE: B R O W S E;
   
   ID : [A-Za-z_] [a-zA-Z0-9_]*;
   
  
positive.code:  | CATCH
   | FINALLY
   | ENDTRY
   |ID
   ;
  
  
negative.code:  | (GO | GOTO) (TOP | BOTTOM | RECORD? expr) (IN specialExpr)? #goRecord
   | COPY STRUCTURE? TO specialExpr #copyTo
   | ZAP (IN specialExpr)? #zapTable
   | BROWSE (~NL)* #browse
  
   | CLOSE ((DATABASES | INDEXES | TABLES) ALL? | ALL) #closeStmt
   | READ EVENTS #readEvent
  