*COMDECK MDSCDDCLS
  
# THE FOLLOWING ITEMS DESCRIBE THE SCHEMA DIRECTORY ENTRY              #
  
        ITEM MDSCWRD      U(0,00,60);  # USED FOR WORD REFERENCES      #
        ITEM MDSCNAME     C(0,00,30);  # SCHEMA NAME                   #
        ITEM MDSCWASC     U(3,00,30);  # WA OF SCHEMA INFO TABLE       #
        ITEM MDSCWAAD     U(3,30,30);  # WA OF AREA DIRECTORY TABLE    #
        ITEM MDSCWADP     U(4,00,30);  # WA OF DATA BASE PROCEDURE LIST#
        ITEM MDSCWASB     U(4,30,30);  # WA OF SUBSCHEMA/CST DIRECTORY #
        ITEM MDSCWAVD     U(5,00,30);  # WA OF VERSION DIRECTORY TABLE #
        ITEM MDSCWAPIT    U(5,30,30);  # WA OF PERM FILE INFO TABLE    #
        ITEM MDSCNBARS    U(6,00,12);  # NUMBER OF AREAS SPECIFIED IN  #
                                       # THE SCHEMA                    #
        ITEM MDSCPITSZ    U(6,12,18);  # LENGTH IN WORDS OF PERMANENT  #
                                       # FILE INFORMATION TABLE        #
                                       # EXTENDED IN MDSCPITSX         #
        ITEM MDSCSSSZ     U(6,30,15);  # LENGTH IN WORDS OF SUBSCHEMA  #
                                       # DIRECTORY                     #
        ITEM MDSCDPSZ     U(6,45,15);  # LENGTH IN WORDS OF DBP LIST   #
        ITEM MDSCIDNT     U(7,00,12);  # SCHEMA ID                     #
        ITEM MDSCFLAG     U(7,12,06);  # SCHEMA FLAGS                  #
          ITEM MDSCWRTFLG B(7,12,01);  # T - SCHEMA ALREADY WRITTEN TO #
                                       #     THE NEW MD FILE           #
          ITEM MDSCTRFG   B(7,13,01);  # T - TRANSACTION FILE PRESENT  #
          ITEM MDSCRIFG   B(7,14,01);  # T - RESTART ID FILE PRESENT   #
          ITEM MDSCJLFG   B(7,15,01);  # T - JOURNAL LOG FILE PRESENT  #
          ITEM MDSCQRFG   B(7,16,01);  # T - QUICK RECOVERY FILE PRES. #
          ITEM MDSCBRFG   B(7,17,01);  # T - BASIC RECOVERY FILE PRES. #
        ITEM MDSCNOVER    U(7,18,12);  # NUMBER OF VERSIONS            #
        ITEM MDSCAISZ     U(7,30,15);  # LENGTH IN WORDS OF AREA       #
                                       # INFORMATION TABLE             #
        ITEM MDSCADSZ     U(7,45,15);  # LENTGH IN WORDS OF AREA       #
                                       # DIRECTORY TABLE               #
        ITEM MDSCSISZ     U(8,00,15);  # LENGTH IN WORDS OF THE SCHEMA #
                                       # INFORMATION TABLE             #
        ITEM MDSCMAXLOG   U(8,15,15);  # MRL OF A JOURNAL LOG RECORD   #
          # MDSCMAXLOG SIZE OF 15 BITS IS INADEQUATE WHEN THE MAXIMUM  #
          # IS STORED AS A CHARACTER COUNT.                            #
          # THE SIZE OF THE FIELD CANNOT BE EXPANDED WITHOUT REQUIRING #
          # ALL EXISTING MASTER DIRECTORIES TO BE REBUILT, SO THE      #
          # CURRENT FORMAT IS RETAINED FOR VALUES UP TO 32767.         #
          # WHEN THE MAXIMUM EXCEEDS 32767 IT IS STORED AS THE NUMBER  #
          # OF EIGHT WORD BLOCKS THAT ARE REQUIRED TO STORE THE        #
          # MAXIMUM SIZE LOG RECORD.                                   #
          # IN THE OLD FORMAT THE RIGHT MOST BIT WAS ALWAYS ZERO, SO   #
          # THAT BIT IS ALWAYS SET TO ONE IN THE NEW FORMAT.           #
          # THAT BIT, NAMED MDSCMAXLXL, IS USED TO IDENTIFY THE NEW    #
          # FORMAT OF EXTRA LARGE RECORD SIZES.                        #
        ITEM MDSCMAXLXL   B(8,29,01);  # EXTRA LARGE MRL OF A LOG REC  #
                                       # BITS 30-59 ARE UNUSED         #
        ITEM MDSCWORD9    U(9,00,60);  # UNUSED                        #
        ITEM MDSCCUTWA    U(10,00,30); # WA OF CONSTRAINT USE TABLE    #
        ITEM MDSCCSLWA    U(10,30,30); # WA OF SCHEMA CHECKSUM LIST    #
        ITEM MDSCCSLSZ    U(11,00,15); # LENGTH IN WORDS OF SCHEMA     #
                                       # CHECKSUM LIST                 #
        ITEM MDSCCUTSZ    U(11,15,15); # LENGTH IN WORDS OF CONSTRAINT #
                                       # USE TABLE                     #
        ITEM MDSCPITSX    U(11,30,09); # EXTENSION OF MDSCPITSZ        #
  
                                       # BITS 39-59 ARE UNUSED         #
  
        ITEM MDSCKITWA    U(12,00,30); # WA OF KEY INFORMATION TABLE   #
        ITEM MDSCKITSZ    U(12,30,15); # LENGTH IN WORDS OF KEY        #
                                       # INFORMATION TABLE             #
        ITEM MDSCNBAFTIM  U(12,45,15); # NUMBER OF AREAS WHICH HAVE    #
                                       # LOG AFTER IMAGES SPECIFIED    #
