anchor.diff:   | CATCH
    | FINALLY
    | ENDTRY
  + | BROWSE
    |ID
    ;
   
  
positive.code: CATCH: C A T C H;
  FINALLY: F I N A L L Y;
  ENDTRY: E N D T R Y;
  
  ID : [A-Za-z_] [a-zA-Z0-9_]*;
  
  
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
  