Summary of HDR Data Dictionary changes from Version 19931221 to Version YYYYMMDD
OLD VERHDR       8 0 C YYYYMMDD        99         10 HDR VERSION 19940422                                        
NEW VERHDR       8 0 C YYYYMMDD        99         10 HDR VERSION 20030110 BETA                                   
OLD OILCODE     38 0 C                 99         60 CANDIDATE OIL CODE                                          
NEW OILCODE     38 0 C                 99         60 NON-REFERENCE OIL CODE                                      
OLD VERSION      8 0 C YYYYMMDD        99        140 HDR     VERSION 19931221                                    
NEW VERSION      8 0 C YYYYMMDD        99        140 YYYYMMDD                                                    
OLD	
NEW ACKEMAIL    70 0 C                 99        150 LAB CONTACT FOR TRANSMISSION ACKNOWLEDGEMENTS