*COMDECK MDSBDDCLS
  
# THE FOLLOWING ITEMS DESCRIBE THE SUBSCHEMA DIRECTORY                 #
  
        ITEM MDSBCW     U(0,00,60);    # SUBSCHEMA DIRECTORY CONTROL WD#
                                       # BITS 0-47 ARE UNUSED          #
        ITEM MDSBNBSB   U(0,48,12);    # NUMBER OF SUBSCHEMA ENTRIES   #
        ITEM MDSBNAME   C(0,00,30);    # SUBSCHEMA NAME                #
        ITEM MDSBENCW   U(3,00,60);    # USED TO HOLD THE SUBSCHEMA LFN#
        ITEM MDSBCPLN   U(3,12,18);    # LENGTH IN WORDS OF THE CST    #
                                       # MAPPING CAPSULE  TABLE        #
        ITEM MDSBWACS   U(3,30,30);    # WORD ADDRESS IN MD OF CST     #
        ITEM MDSBLFN    C(3,00,07);    # SUBSCHEMA LFN (TEMPORARY)     #
        ITEM MDSBSSTMDT U(4,00,60);    # SUBSCHEMA COMPILATION TIME    #
                                       # AND DATE                      #
        ITEM MDSBSSTME  U(4,00,30);    # SUBSCHEMA DIRECTORY CREATION  #
                                       # TIME (HH.MM)                  #
        ITEM MDSBSSDTE  U(4,30,30);    # SUBSCHEMA DIRECTORY CREATION  #
                                       # DATE (YYDDD)                  #
        ITEM MDSBINFO   B(5,00,01);    # TRUE - SUBSCHEMA INFO TABLE   #
                                       # HAS ALREADY BEEN WRITTEN TO   #
                                       # THE NEW MD                    #
                                       # BITS 1-44 ARE UNUSED          #
        ITEM MDSBSZCS   U(5,45,15);    # LENGTH IN WORDS OF THE CST    #
                                       # EXCLUDING MAPPING CAPSULES    #
        ITEM MDSBCKSM   U(6,00,60);    # SUBSCHEMA DIRECTORY CHECKSUM  #
  
