anchor.diff:  
   
   table_compression
  -    : (COMPRESS
  +    : COMPRESS
           ( BASIC
           | FOR ( OLTP
                 | (QUERY | ARCHIVE) (LOW | HIGH)?
                 )
           )?
         | NOCOMPRESS
  -      )
       ;
   
   physical_attributes_clause
  -    :   (PCTFREE pctfree=UNSIGNED_INTEGER
  +    : (PCTFREE pctfree=UNSIGNED_INTEGER
           | PCTUSED pctused=UNSIGNED_INTEGER
           | INITRANS inittrans=UNSIGNED_INTEGER
           | storage_clause
  
positive.code: /* TODO
  //SHOULD BE OVERRIDEN!
  compilation_unit
      :  seq_of_statements* EOF
      ;
  
  //SHOULD BE OVERRIDEN!
  
negative.code:     ;
  
  type_declaration
      : TYPE identifier IS (table_type_def | varray_type_def | record_type_def | ref_cursor_type_def) ';'
      ;
  
  table_type_def
  