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Length: 21622 (0x5476)
Types: TextFile
Names: »CTERM.DECL.S«
└─⟦c174207bd⟧ Bits:30005194 8" CR80 Floppy CR80FD_0192 ( VOL: FLOPPY )
└─⟦194c604ac⟧
└─ ⟦this⟧ »CTERM.0001.D!CTERM.DECL.S«
"PAGE «ff»
"DECLARATION CONCERNING MTCB
"---------------------------
TYPE MTCB_WORK_SPACE_TYPE = ARRAY[0..7] OF INTEGER;
TYPE REAL_MTCB_TYPE =
RECORD
TAGFIELD: INTEGER;
APREC: INTEGER;
IPREC: INTEGER;
CLASS: INTEGER;
SPEC: INTEGER;
MTYPE: INTEGER;
LENGTH: INTEGER; "NOTE: CORRESPOND TO WORD4 IN PSEUDO_MTCB_TYPE
HDB_ADDRESS: LONG;
WORD4: INTEGER;
WORD5: INTEGER;
WORD6: INTEGER;
WORD7: INTEGER;
END;
TYPE PSEUDO_MTCB_TYPE =
RECORD
TAGFIELD: INTEGER;
CATEGORY: INTEGER;
SUBCAT: INTEGER;
BYTE1: INTEGER;
WORD2: INTEGER;
WORD3: INTEGER;
WORD4: INTEGER; "NOTE: CORRESPOND TO LENGTH IN REAL_MTCB_TYPE
WORD5: INTEGER;
WORD6: INTEGER;
WORD7: INTEGER;
END;
CONST
RETRIEVE_DTG_REF = ADDRESS(0@REAL_MTCB_TYPE.WORD6); "ORDINARY MESSAGE
DT_MSG_ID_REF = ADDRESS(0@PSEUDO_MTCB_TYPE.WORD3); "AT DT-TRANSFER
MTCB_BUFFER_SIZE = MAX(SIZE(REAL_MTCB_TYPE),SIZE(PSEUDO_MTCB_TYPE));
"PAGE «ff»
CONST
MTCB = 107;
"MTCB FUNCTIONS MTCB COMPLITION CODE
"-------------- --------------------
INITMTCB = 0; PCBI_OUT_OF_RANGE = #0901;
CREATEMTCB = 1; NOT_INITED = #0902;
RESERVEMTCB = 2; MTCBI_OUT_OFRANGE = #0903;
RELEASEMTCB = 3; MTCB_NOT_IN_USE = #0904;
WRITEMTCB = 4; ALL_SAVE_AREAS_USED = #0905;
READMTCB = 5; SUBSYSNO_OUT_OF_RANGE = #0906;
CREATEMTCBFILE = 6; NO_MTCB_AVAILABLE = #0907;
GETMTCBFILE = 7; ILLEGAL_UPDATE_CODE = #0908;
RELEASEMTCBFILE = 8; USE_COUNT_GT1 = #0909;
FILE_ALREADY_EXISTS = #090A;
NO_IMF_SPACE_AVAILABLE = #090B;
NO_PDB_FILE_AVAILABLE = #090C;
NO_FILE_REF = #090D;
NO_FILE_IN_USE = #090E;
"MTCB WAITOPTIONS MTCB_TYPES
"---------------- ----------
NO_WAIT_NORMAL_MTCB = 0; TYPE_PSEUDO_MTCB = 0;
WAIT_NORMAL_MTCB = 1; TYPE_REAL_MTCB = 1;
NO_WAIT_PRIVILEGED_MTCB = 2;
WAIT_PRIVILEGED_MTCB = 3;
"MTCB FILE TYPES MESSAGE TYPES (IN MTYPE)
"--------------- ------------------------
IMF_FILE = 1; NARRATIVE_MESSAGE = 0;
PDB_FILE = 2; MEDE_CONTROL_MESSAGE = 1;
HDB_FILE = 3; NODE_CONTROL_MESSAGE = 3;
"PAGE «ff»
"DECLARATION CONSERNING QACCESS
"-------------------------------
QACCESS = 108;
TYPE QIOCB_TYPE =
RECORD
W1: INTEGER;
W2: INTEGER;
W3: INTEGER;
W4: INTEGER;
W5: INTEGER;
S0_7: ARRAY[0..7] OF INTEGER;
END;
CONST
"FUNNTIONS COMPLITION CODES
"--------- ----------------
INITIALIZE_QACCESS = 0; OK = #0800;
SET_THRESHOLD = 1; OPERATION_FAILED = #0801;
LENGTH_OF_QUEUE = 2; ILLEGAL_INPUT_PARAM = #0802;
LENGTH_OF_GROUP = 3; QUEUE_EMPTY = #0803;
READ_NON_DESTRUCTIVE = 4; FIRST_ENTRY_NOT_ACTIVE = #0804;
READ_DESTRUCTIVE = 5; QUEUE_OVERFLOW = #0805;
READ_GROUP_ELEMENT = 6; FIRST_ENTRY_PENDING_READ = #0806;
DELETE_ELEMENT = 7;
WRITE_ELEMENT = 8;
REORGANIZE_QUEUE = 9;
APPEND_QUEUE = 10;
RELEASE_ACTIVE_FLAG = 11;
"PAGE «ff»
"QUEUE DESTINATION SIMPLE FLAG READ ENTRY FUNCTIONS
"----------------- ---------------- ---------------
LAST_ENTRY = 0; SET_FIRST_ENTRY_ACTIVE = 0; NO_WAIT_NORMAL_QACCESS = 0;
FIRST_ENTRY = 1; NO_ACTIVATION = 1; WAIT_NORMAL_QACCESS = 1;
NO_WAIT_PRIVILEGED_QACCESS = 3;
WAIT_PRIVILEGED_QACCESS = 4;
DT_TERM_NO = 0; "SUPERVISOR DT TERMINAL NUMBER
DT_QUEUE_NO = 0; "SUPERVISOR DT TERMINAL-QUEUE NUMBER
%WHEN CCIS_VERSION = TRUE SKIP
MDS_TERM_NO = 31; "MDS TERMINAL NUMBER
%COMPILE
%WHEN CCIS_VERSION = FALSE SKIP
MDS_TERM_NO = 38; "USED AS INPUT-Q TO CPIPX
%COMPILE
"PAGE «ff»
"DECLARATION CONCERNING RDF-MONITOR USE
"--------------------------------------
CONST
RDF = 109;
GET_ANO_AIG = 1;
GET_AIG_EXIST = 4;
GET_ANO_TERM = 3;
TYPE
GET_ANO_AIG_SAVE = RECORD
FA: FILE_ADDRESS;
BLE: BUFFER_LIST_ELEMENT;
S: REGISTERS;
END;
GET_ANO_AIG_WORK = RECORD
AIG: INTEGER;
ENTRY_LENGTH: INTEGER;
A,B,E,F,H,K,L,N: ARRAY[0..6] OF INTEGER;
T,U,V,W,X: ARRAY[0..15] OF INTEGER;
END;
GET_ANO_TERM_WORK = RECORD
ANO: INTEGER;
TERM_NO: INTEGER;
S: REGISTERS;
END;
GET_AIG_EXIST_WORK = RECORD
S: REGISTERS;
END;
"PAGE «ff»
CONST
RDF_WORK_AREA_SIZE = MAX(SIZE(GET_ANO_AIG_SAVE),
SIZE(GET_ANO_TERM_WORK),
SIZE(GET_AIG_EXIST_WORK));
TYPE
ANO_CODE_TYPE = (TO_ADDRESS,
INFO_ADDRESS,
NEG_TO_ADDRESS,
NEG_INFO_ADDRESS,
TO_AIG_ADDRESS,
XMT_AIG_ADDRESS,
FM_ADDRESS,
SPARE_ANO_TYPE);
CONST
"MONITOR PROCEDURES
"------------------
GETDTG = 111;
CONVDTG = 112;
LOG_JOURNAL = 114;
TESTHDB = 113;
SENDREPORT = 115;
LCFH = 121;
"PAGE «ff»
"DECLARATION CONCERNING DTG
"--------------------------
CONST
DTG_WORK_LENGTH = 60; "LENGTH OF DTG_WORK_AREA
DTG_EDIT_LENGTH = 72; "LENGTH OF DTG_EDIT_AREA
TYPE
DTG_WORK_AREA_TYPE = ARRAY[0..DTG_WORK_LENGTH-1] OF CHAR;
DTG_EDIT_AREA_TYPE = ARRAY[0..DTG_EDIT_LENGTH-1] OF CHAR;
"REFERENCES IN DTG_WORK
"----------------------
CONST
CONVERSION_FLAG_REF = 0;
DTG_ASCII_REF = 2; "BYTE OFFSET
DTG_INTEGER_REF = 8; "WORD OFFSET
DTG_ASCII_LENGTH = 14; "BYTE LENGTH
CONST
LOC_RELEASE_DTG = 24; "BYTE OFFSET
LOC_RETRIE_DTG = 57; "BYTE OFFSET
"SENDREPORT DECLARATIONS
"-----------------------
TYPE
SENDREPORT_WORK_AREA_TYPE = ARRAY[0..20] OF INTEGER;
CONST
REF_TYPE = 0;
"PAGE «ff»
"DECLARATION CONCERNING MESSAGE_JOURNAL
"--------------------------------------
CONST
LOG_JOURNAL_WORK_LENGTH = 13 + 8; "LENGTH OF LOG_JOURNAL_WORK_AREA
TYPE
LOG_JOURNAL_WORK_AREA_TYPE = ARRAY[0..LOG_JOURNAL_WORK_LENGTH-1] OF INTEGER;
"DECLARATIONS CONCERNING TERMINAL CONTROL BLOCKS
"-----------------------------------------------
CONST
TCB_LENGTH = 16; "IN BYTES
TYPE
TCB_TYPE = ARRAY[0..TCB_LENGTH-1] OF CHAR;
CONST
U_TID_OFFSET = 0;
V_USID_OFFSET = 4; "BYTE OFFSET
K_USC_OFFSET = 13; "BYTE OFFSET
U_ANO_OFFSET = 7; "WORD OFFSET
"PAGE «ff»
"DECLARATION CONCERNING BINARY_HEADER (NARRATIVE MESSAGE)
"--------------------------------------------------------
CONST
BINARY_HEADER_LENGTH = 26; "LENGTH IN BYTES
REF_MESSAGE_LENGTH = 4; "WORD ADDRESS IN BINARY_HEADER
REF_ADDRESS_LIST_OFFSET = 6; "WORD ADDRESS IN BINARY_HEADER
REF_SIGNAL_HEADER_LENGTH = 8; "WORD ADDRESS IN BINARY_HEADER
REF_ACCEPT_DTG = 9; "WORD ADDRESS IN BINARY_HEADER
REF_MSG_ID_OFFSET = 11; "WORD ADDRESS IN BINARY_HEADER
REF_SIC_REFERENCE = 12; "WORD ADDRESS IN BINARY_HEADER
REF_ACTION_PREC = 2; "BYTE OFFSET IN BINARY HEADER
REF_INFO_PREC = 14; "BYTE OFFSET IN BINARY HEADER
REF_CLASSIFICATION = 11; "BYTE OFFSET IN BINARY HEADER
REF_SPEC_CODE = 10; "BYTE OFFSET IN BINARY HEADER
"OFFSETS/REFFERENCES IN CONTROL MESSAGES
"---------------------------------------
OFFSET_MAINTYPE = 3; "BYTE OFFSET IN MESSAGE
OFFSET_PRECEDENCE = 2; "BYTE OFFSET IN MESSAGE
OFFSET_MESSAGE_LENGTH = 4; "WORD OFFSET IN MESSAGE
OFFSET_CATEGORY = 11; "BYTE OFFSET IN MESSAGE
OFFSET_TYPE = 10; "BYTE OFFSET IN MESSAGE
OFFSET_ORIGINATOR = 12; "BYTE OFFSET IN MESSAGE
OFFSET_ACK_CHANNEL_NO = 38; "BYTE OFFSET IN MESSAGE
OFFSET_NACK_CHANNEL_NO = 39; "BYTE OFFSET IN MESSAGE
"CONTROL MESSAGE TYPES (SUBCATEGORY)
"-----------------------------------
MESSAGE_ACK = 1;
MESSAGE_NACK = 2;
OPEN_LINK_REQUEST = 3;
OPEN_LINK_AGREEMENT = 4;
OPEN_LINK_REJECTION = 5;
CLOSE_LINK = 6;
KEEP_ALIVE = 7;
CCIS_CATEGORY = 16;
"PAGE «ff»
"CCIS LINK STATUS (IN CONFIG.CONSTANT_BLOCK.CCIS_STATUS)
"------------------------------------------------------
CCIS_LINK_NOT_EXIST = 0;
CCIS_LINK_CLOSED = 1;
CCIS_LINK_OPEN = 2;
CCIS_LINK_FAILED = 3;
"CHANNEL DECLARARTIONS
"---------------------
TYPE
CHANNELS =
(CONTROL_CHANNEL, "(= 0)
NARRATIVE_CHANNEL, "(= 1)
NO_OF_CHANNELS); "(= 2)
CHANNELS_ARRAY = ARRAY[0..NO_OF_CHANNELS-1] OF INTEGER;
"DEFINITION OF BITS IN STATUS-WORD
"---------------------------------
CONST
CONTROL_CHANNEL_ACTIVE = CONTROL_CHANNEL; "(=0)
NARRATIVE_CHANNEL_ACTIVE = NARRATIVE_CHANNEL; "(=1)
OUTSTANDING_OPEN_REQUEST = 8;
OPEN_LINK_TIMEOUT = 10*60*10; "10 MINUTES
MAX_FILE_LENGTH = 9000; "MAX. LENGTH OF NARRATIVE MESSAGE
"PAGE «ff»
TYPE
INTEGERS = ARRAY[0..#FF] OF INTEGER;
LONGSE = RECORD LONGS:ARRAY[0..#FFF] OF LONG; END;
LONGSO = RECORD ODDOFFSET:INTEGER; LONGS:ARRAY[0..#FFF] OF LONG; END;
TYPE STATIC_RECORD_TYPE =
RECORD
NO_OF_MESSAGES: INTEGER;
NO_OF_ANOS: INTEGER;
NO_OF_BYTES: LONG;
END;
CONST
MAX_WORK_AREA_SIZE = MAX(SIZE(MTCB_WORK_SPACE_TYPE),
SIZE(DTG_WORK_AREA_TYPE),
SIZE(SENDREPORT_WORK_AREA_TYPE),
SIZE(LOG_JOURNAL_WORK_AREA_TYPE),
RDF_WORK_AREA_SIZE);
"PAGE «ff»
CONST
" LABEL USED IN CTERM-PROCESS RAISED BY (CALL OF) WANTED ACTION BY CODE
" --------------------------- ------------------- ------------- -------
GETROOT_MOVHEAD_ERROR = 101; " MON(IO,GETROOT) ?/SWITCHOVER ALL
GETROOT_FIXHEAD_ERROR = 102; " MON(IO,GETROOT) ?/SWITCHOVER ALL
LOOKUP_RDF_ERROR = 103; " MON(IO,LOOKUP) OF RDF-FILE ?/SWITCHOVER ALL
INITMTCB_ERROR = 300; " MON(MTCB,INIT) ?/SWITCHOVER ALL
CREATEMTCB_ERROR = 301; " MON(MTCB,CREATE) WAIT 30 S, TRY AGAIN LOCAL_FIX_UP
" ?/SWITCHOVER OTHERS
RESERVEMTCB_ERROR = 302; " MON(MTCB,RESERVE) ?/SWITCHOVER ALL
RELEASEMTCB_ERROR = 303; " MON(MTCB,RELEASE) ?/SWITCHOVER ALL
WRITEMTCB_ERROR = 304; " MON(MTCB,WRITE) ?/SWITCHOVER ALL
READMTCB_ERROR = 305; " MON(MTCB,READ) ?/SWITCHOVER ALL
CREATEMTCBFILE_ERROR = 306; " MON(MTCB,CREATEMTCBFILE) WAIT 30 S, TRY AGAIN LOCAL_FIX_UP
" ?/SWITCHOVER OTHERS
GETMTCBFILE_ERROR = 307; " MON(MTCB,GETMTCBFILE) ?/SWITCHOVER ALL
RELEASEMTCBFILE_ERROR = 308; " MON(MTCB,RELEASEFILE) ?/SWITCHOVER ALL
ENQUEUE_TO_MDS_ERROR = 401; " MON(QACCESS,WRITE_ELEMENT) WAIT 30 S, TRY AGAIN LOCAL_FIX_UP
" ?/SWITCHOVER OTHERS
GET_START_RESTART_FLAG_ERROR = 501; " MON(REGION,RCOPYN) FROM CONFIG ?/SWITCHOVER ALL
GET_TERM_NO_CCIS_ERROR = 502; " MON(REGION,RCOPYN) FROM CONFIG ?/SWITCHOVER ALL
GET_STATUS_CCIS_ERROR = 503; " MON(REGION,RCOPYN) FROM CONFIG ?/SWITCHOVER ALL
GET_TCB_CCIS_ERROR = 504; " MON(REGION,RCOPYN) FROM XTCBCR ?/SWITCHOVER ALL
ENTER_CONFIG_ERROR = 511; " MON(REGION,ENTER) OF CONFIG ?/SWITCHOVER ALL
UPDATE_CONFIG_ERROR = 512; " MON(REGION,RPUT) IN CONFIG ?/SWITCHOVER ALL
LEAVE_CONFIG_ERROR = 513; " MON(REGION,LEAVE) OF CONFIG ?/SWITCHOVER ALL
ENTER_STATIC_ERROR = 521; " MON(REGION,ENTER) OF STATIC ?/SWITCHOVER ALL
READ_STATIC_ERROR = 522; " MON(REGION,RGETN) FROM STATIC ?/SWITCHOVER ALL
UPDATE_STATIC_ERROR = 523; " MON(REGION,RPUTN) IN STATIC ?/SWITCHOVER ALL
LEAVE_STATIC_ERROR = 524; " MON(REGION,LEAVE) OF STATIC ?/SWITCHOVER ALL
"PAGE «ff»
" LABEL USED IN CTERM-PROCESS RAISED BY (CALL OF) WANTED ACTION BY CODE
" --------------------------- ------------------- ------------- -------
READ_MESSAGE_ERROR = 601; " MON(IO,READBYTES) ?/SWITCHOVER ALL
WRITE_MESSAGE_ERROR = 602; " MON(IO,MODIFYBYTES) ?/SWITCHOVER ALL
INSERT_ACCEPT_DTG_ERROR = 603; " MON(IO,MODIFYBYTES) ?/SWITCHOVER ALL
GETFILEINFORMATION_ERROR = 604; " MON(IO,GETFILEINFORMATION) ?/SWITCHOVER
DTG_CONVERSION_ERROR = 701; " MON(CONVDTG) ?/SWITCHOVER ALL
LOG_JOURNAL_ERROR = 702; " MON(LOG_JOURNAL) ?/SWITCHOVER ALL
SENDREPORT_ERROR = 703; " MON(SENDREPORT) ?/SWITCHOVER ALL
CHECKPOINT_ERROR = 801; " AT CHECKPOINTING ?/SWITCHOVER #FFFF
GET_AIG_ERROR = 901; " MON(RDF,GET_ANO_AIG) ?/SWITCHOVER ALL
"PAGE «ff»
" LABELS USED IN CONNECTION WITH DETECTION OF ERRORS IN MESSAGE PROCESSING
ILLEGAL_CATEGORY = #8001; "OF CONTROL MESSAGE
UNKNOWN_CONTROL_MESSAGE = #8002;
ILLEGAL_ACK_NACK = #8003;
ILLEGAL_FILE_LENGTH = #9001;
ILLEGAL_MESSAGE_LENGTH = #9002;
ILLEGAL_ANO_LIST_OFFSET = #9003;
ILLEGAL_SIC_OFFSET = #9004;
ILLEGAL_REF_SIGNAL_HEADER = #9005;
ILLEGAL_REF_MSGID = #9006;
ILLEGAL_ACTION_PREC = #9007;
ILLEGAL_INFO_PREC = #9008;
ILLEGAL_SIC_CODE = #9009;
ILLEGAL_CLASSIFICATION = #9010;
"PAGE «ff»
VAR
STATUS: INTEGER;
STATUS_CCIS: INTEGER;
TERM_NO_CCIS: INTEGER;
MES_BUF: MESSAGE_BUFFER;
QIOCB: QIOCB_TYPE;
MTCBID: INTEGER;
MSG_ID: ARRAY[0..5] OF CHAR; "STORAGE OF MESSAGE ID
FILEID_MOVHEAD: INTEGER;
FILEID_FIXHEAD: INTEGER;
FILEID: INTEGER;
RDF_FILE_ID: INTEGER;
FILEADDR: FILE_ADDRESS;
BLE_BUFFER: BUFFER_LIST_ELEMENT; "MISCELLANEOUS USE
FILEADDR_DTG: FILE_ADDRESS;
BLE_DTG: BUFFER_LIST_ELEMENT;
"PAGE «ff»
CPIP_NAME: PROCESS_NAME;
CTERM_NAME: PROCESS_NAME;
CHECKP_NAME: PROCESS_NAME;
CONFIG_NAME: REGION_NAME;
XTCBCR_NAME: REGION_NAME;
STATIC_NAME: REGION_NAME;
CHECKP_MESS_BUF0: CHECKPOINT_MESSAGE;
CHECKP_MESS_BUF1: CHECKPOINT_MESSAGE;
DUMPREGS_0: REGISTERS;
DUMPREGS_1: REGISTERS;
DUMPREGS_2: REGISTERS;
MTCB_BUFFER: ARRAY[0..MTCB_BUFFER_SIZE-1] OF INTEGER;
TCB_CCIS: TCB_TYPE;
STATIC_RECORD: STATIC_RECORD_TYPE;
RDF_NAME: FILE_NAME;
VOLUME_MOVHEAD: VOLUME_NAME;
VOLUME_FIXHEAD: VOLUME_NAME;
FILE_SYSTEM: FILE_SYSTEM_NAME;
WORK_AREA: ARRAY[0..MAX_WORK_AREA_SIZE-1] OF INTEGER;
AIG_BUFFER: ARRAY[0..SIZE(GET_ANO_AIG_WORK)-1] OF INTEGER;
BUFFER: ARRAY[0..511] OF CHAR;
"PAGE «ff»
INIT
"CHECKPINT MESSAGES
"------------------
"RETRIVE OF CCIS_STATUS (AT RESTART)
"-----------------------------------
CHECKP_MESS_BUF0 = (RETRIEVE_CHECKPOINT SHIFTLL 15) "COMMAND
+ (SYSTEM_CHECKPOINTS SHIFTLL 8)
+ (CHECKPOINT_SINGLE_WORD SHIFTLL 4),
OFFSET_CCIS_STATUS,
0;
"ENQUEUE TO MDS
"--------------
CHECKP_MESS_BUF1 = (STORE_CHECKPOINT SHIFTLL 15) "COMMAND
+ (MTCB_CHECKPOINTS SHIFTLL 8)
+ (ENQUEUE_SINGLE SHIFTLL 4)
+ (1 SHIFTLL MTCB_UPDATE)
+ (1 SHIFTLL CLEAR_QUEUE_MAP),
'*', "MTCB_INDEX
MDS_TERM_NO, "MDS-TERMINAL NO - T0
'*'; "QUEUE NO - TO
"PAGE «ff»
STATUS_CCIS = CCIS_LINK_CLOSED;
BLE_BUFFER.KIND = BMLOCALLOWER;
BLE_BUFFER.LINK = 0;
BLE_BUFFER.ADDR = ADDRESS(BUFFER);
BLE_BUFFER.BYTE_SIZE = SIZE(BUFFER)*2;
FILEADDR_DTG.FIRST_BYTE = REF_ACCEPT_DTG*2;
FILEADDR_DTG.BYTE_COUNT = 4; "BYTE_SIZE(LONG)
BLE_DTG.KIND = BMLOCALLOWER;
BLE_DTG.LINK = 0;
BLE_DTG.ADDR = ADDRESS(WORK_AREA) + DTG_INTEGER_REF;
BLE_DTG.BYTE_SIZE = 4; "BYTE_SIZE(LONG)
CPIP_NAME.NAME = 'CPIP';
CTERM_NAME.NAME = 'CTERM';
%WHEN CCIS_VERSION = FALSE SKIP
CPIP_NAME.NAME = 'CPIPX';
CTERM_NAME.NAME = 'CTERMX';
%COMPILE
CHECKP_NAME.NAME = 'CHECKP';
CONFIG_NAME.NAME = 'CONFIG';
XTCBCR_NAME.NAME = 'XTCBCR';
STATIC_NAME.NAME = 'STATIC';
FILE_SYSTEM.PNAME.NAME = 'DMA000';
FILE_SYSTEM.GNAME = 'FILE';
RDF_NAME = 'RDF';
VOLUME_MOVHEAD = 'MOVHEAD';
VOLUME_FIXHEAD = 'FIXHEAD';