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                                     PP.DIFF
       2
   pp.shift.diff.dictionary
     pp.shift.diff.grades
     pp.shift.diff.standard.shifts

 Ì       2
pp.shift.diff.dictionary    (main) 
[effective.date]
&JD[jd]

 Field Name                 Len Dat Typ  J  DPM            Offset/Local/VAL                                        
 effective.date               8 DATE     L                 jd                                                          
 active                       1 YN       L                 &JD[jd]|0                                                   
 last.update                 50 FREE     L                 &JD[jd]UPD                                                  
 Ì       2
pp.shift.diff.grades    (grade.shift.diffs) 
[effective.date, grade,grade.shift]
&JD[jd]G[jg,jdS]

 Field Name                 Len Dat Typ  J  DPM            Offset/Local/VAL                                        
 grade                        7 FREE     L  PP.GRADE       jg                                                      
 grade.shift                  1 PINT     R                 jdS                                                         
 grade.diff                   8 FREE     R                 &JD[jd]G[jg,jdS]                                            
 Ì       2
pp.shift.diff.standard.shifts    (standard.shift.diffs) 
[effective.date, std.shift]
&JD[jd]S[jdS]

 Field Name                 Len Dat Typ  J  DPM            Offset/Local/VAL                                        
 std.shift                    1 PINT     R                 jdS                                                         
 std.diff                     8 FREE     R                 &JD[jd]S[jdS]