LC MARC Backfile

We receive records from the Library of Congress on a daily and weekly basis. These records are then stored into a backfile database.

The Library Corporation, Research Park, Inwood, WV 25428

A Free MARC Inventory and Census Service
Institution: Current Backfile
Profile Type: MARC Leader and Fields
Performed on: Wed, Feb 20, 2008. 12:18:48 PM

Overall Statistics
DescriptionMaximumMinimumAverageTotals
Number of Records---5796482
Characters per Record159771427374274939638
Characters per Field99882333787917020
Fields per Record131719111611811

Record Status (MARC Leader Position 05)
DescriptionMARC CodeRecord CountPercent of RecordsFile Space ConsumedPercent of File Space
Higher Encoding Levela1992723.441399696803.27
Corrected or Revisedc343216759.21269439402163.03
Newn179219730.92119792715028.02
Correction from Prepublicationp3728466.432426487875.68

Record Type (MARC Leader Position 06)
DescriptionMARC CodeRecord CountPercent of RecordsFile Space ConsumedPercent of File Space
Language Materiala512294988.38364362035585.23
Printed Musicc674411.16456147271.07
Manuscript Musicd14840.039712200.02
Printed Mape1645772.841440187163.37
Manuscript Mapf13670.0215690240.04
Projected Mediag999381.721008471852.36
Nonmusical Sound Recordingi426500.74415617130.97
Musical Sound Recordingj2241323.872184330995.11
Two Diminsional, Non-Projectionk616881.06667079371.56
Computer Filem99360.17112789950.26
Kitso90.0088120.00
Three Dimensional Artifactr160.00161750.00
Manuscript Materialt2890.002873980.01
Unknown Code[unprintable]60.0042820.00

Bibliographic Level (MARC Leader Position 07)
DescriptionMARC CodeRecord CountPercent of RecordsFile Space ConsumedPercent of File Space
Monographic Componenta17710.0321002920.05
Serial Componentb20.0029890.00
Collectionc21870.0434640920.08
Subunitd133250.23183115860.43
Monograph Itemm500018286.26357012080883.51
Serials77901513.4468093987115.93

Control Type (MARC Leader Position 08)
DescriptionMARC CodeRecord CountPercent of RecordsFile Space ConsumedPercent of File Space
No Specified Type[blank]5796482100.004274939638100.00

Character Encoding (MARC Leader Position 09)
DescriptionMARC CodeRecord CountPercent of RecordsFile Space ConsumedPercent of File Space
MARC-8[blank]5796482100.004274939638100.00

Encoding Level (MARC Leader Position 17)
DescriptionMARC CodeRecord CountPercent of RecordsFile Space ConsumedPercent of File Space
Full Level[blank]358302261.81270626146863.31
Full; Unexamined1106150518.3165928643015.42
Less Than Full Level254850.0962173900.15
Abbreviated Level3367480.63255424750.60
Core Level43698056.383101329307.25
Preliminary Level5735891.27531072401.24
Minimal Level75667959.7843667813610.21
Pre-publication8984851.70771118251.80
Unknown Levelu7050.013573190.01
Not Applicablez3430.012444250.01

Descriptive Cataloging Form (MARC Leader Position 18)
DescriptionMARC CodeRecord CountPercent of RecordsFile Space ConsumedPercent of File Space
Non ISBD Form[blank]141635824.4385411840919.98
AACR2a382492465.99305821831571.54
ISBD Formi5199198.973337414747.81
Unknownu2060.001368380.00
Unknown Code[unprintable]350750.61287246020.67

Linked Record Requirement (MARC Leader Position 19)
DescriptionMARC CodeRecord CountPercent of RecordsFile Space ConsumedPercent of File Space
Related Record not Required[blank]5796482100.004274939638100.00

Modified Record (MARC 008 Position 38)
DescriptionMARC CodeRecord CountPercent of RecordsFile Space ConsumedPercent of File Space
Not modified[blank]569894498.32421209977798.53
Dashed-on Omit.d24970.0417451730.04
Romanizedo56660.1047479550.11
Romanized scriptr12810.0210504590.02
Shorteneds16920.0312882210.03
Missing Charactersx10080.026495710.02
No attempt to code|853911.47533559571.25
Unknown Code[unprintable]30.0025250.00

Cataloging Source (MARC 008 Position 39)
DescriptionMARC CodeRecord CountPercent of RecordsFile Space ConsumedPercent of File Space
Library of Congress[blank]455902178.65318146188974.42
National Ag. Lib.a1260.00711150.00
National Lib. Med.b41980.0727419370.06
LC Coop. Cat.c2548734.402320224095.43
Other Sourcesd97578916.8385639534820.03
Report to NSTn60.0042660.00
Unknown Sourceu23630.0421173960.05
No attempt to code|1060.001252780.00

Target Audience (MARC 008 Position 22)
DescriptionMARC CodeRecord CountPercent of RecordsFile Space ConsumedPercent of File Space
Unknown or not spec.[blank]449847077.61317729696674.32
Preschoola84510.1561728960.14
Primaryb351220.61277076160.65
Pre-adolescentc400300.69353655390.83
Adolescentd117630.20104651320.24
Adulte549150.95483064071.13
Specializedf108720.19100513560.24
Generalg31360.0526264970.06
Juvenilej1879513.241304477993.05
No attempt to code|28120.0524038130.06
Unknown Code[unprintable]10.007410.00

Collection Age (MARC 008 Position 07-10)
DescriptionRecord CountPercent of RecordsFile Space ConsumedPercent of File Space
--- 2010 ---80.0080530.00
--- 2009 ---160.00123710.00
--- 2008 ---5590.014451600.01
--- 2007 ---196260.34174215810.41
--- 2006 ---806461.39756661291.77
--- 2005 ---1106651.91992011632.32
--- 2004 ---1197812.071045849772.45
--- 2003 ---1247882.151047863372.45
--- 2002 ---1240632.141040084962.43
--- 2001 ---1260272.171027459772.40
--- 2000 ---1379262.381101422262.58
--- 1999 ---1277492.201005472972.35
--- 1998 ---1253012.16980890412.29
--- 1997 ---1222222.11945030302.21
--- 1996 ---1219782.10939675492.20
--- 1995 ---1215722.10932383682.18
--- 1994 ---1231092.12951309092.23
--- 1993 ---1201562.07915821862.14
--- 1992 ---1181322.04893422962.09
--- 1991 ---1167102.01877711002.05
--- 1990 ---1360192.351051795692.46
1980 - 1989105078918.1378836715718.44
1970 - 197996052016.5765795246315.39
1960 - 19694802978.293028170147.08
1950 - 19592099683.621319795583.09
1940 - 19491593332.751087861482.54
1930 - 19391454982.51988540972.31
1920 - 19291132681.95743189191.74
1910 - 1919897191.55614891791.44
1900 - 19092125113.671594091483.73
1890 - 1899575170.99399090820.93
1880 - 1889449970.78304342930.71
1870 - 1879341210.59238935380.56
1860 - 1869327560.57261457330.61
1850 - 1859246660.43183389970.43
1840 - 1849181070.31135097940.32
1830 - 1839142680.25106599030.25
1820 - 1829100700.1778199750.18
1810 - 181969850.1257506580.13
1800 - 1809134140.2397419240.23
1790 - 179962170.1158849110.14
1780 - 178934140.0635255430.08
1770 - 177928890.0530490420.07
1760 - 175917340.0316548290.04
1750 - 175915300.0313970140.03
1740 - 174911670.0211049690.03
1730 - 17399140.028533180.02
1720 - 17298570.018241790.02
1710 - 17198390.017780080.02
1700 - 17099940.028540840.02
1600 - 169947250.0849297760.12
1500 - 15996570.018037780.02
1400 - 1499460.00505020.00
1300 - 139980.0057160.00
1200 - 129940.0026130.00
1100 - 119960.0042340.00
1000 - 109948770.0831937980.07
Date Unknown20460.0414173270.03
Pre 10002650.001743490.00
No Date74100.1358562110.14
Unknown Code260.00240420.00

Languages (MARC 008 Position 35-37)
DescriptionRecord CountPercent of RecordsFile Space ConsumedPercent of File Space
NOT CODED1644892.841502499473.51
ENGLISH563199397.16412468969196.49

Census of MARC Fields Used in the Collection
TagRecords with TagRepeated FieldsMax LengthMin LengthAverge LengthPercent of RecordsFile Space ConsumedPercent of File Space
15796482-271112100.00743090981.74
34433222-63376.48132996840.31
55668797-16161697.80907007522.12
636770644317180.646645730.02
77105351625573021015.0693264880.22
85796482-404040100.002318592805.42
10579648115201117100.00990122732.32
122309-35560.04149590.00
15376388211995126.5045890980.11
164136177597412170.858484260.02
1762701222778361.0822904370.05
19132-3910110.0015680.00
20259529335566529442150.91627897121.47
22347004751378145.9948835420.11
24703368548714161.3612813990.03
259448631066191.6318076660.04
2749224349190.0198650.00
28240331812581165265.5583788170.20
3026648101128100.462683860.01
322972615368160.514758780.01
334011238412028210.769271840.02
3412130370651805172.2122695130.05
352106151253325841936.77405053650.95
361-2222220.00220.00
3727802894524165674.96192839460.45
3817-11660.001150.00
404965160-42852085.661009931302.36
4131781319775115.4836080930.08
4224164987356941.69236686410.55
43212210819251236.61258000390.60
44634-456110.0174980.00
4534384-936110.593894630.01
469-178110.00990.00
4710945-786120.191364070.00
483498395241466130.775987920.01
5053233065731256142092.831108825482.59
5133847612421677490.6919815500.05
52169647430421385123.6727253990.06
5569479190861776131.5311779620.03
601318006885635182.3925958640.06
612-2015170.00350.00
66647-10660.0138860.00
691121311120.001570.00
703200915535160.555158850.01
715-4636380.001930.00
72495071296648691.086028060.01
7322-355150.003440.00
744747633992725151.4112274500.03
803548395110.0142540.00
82369231622748241563.74574850371.34
842381244609140.05379760.00
8617642761182915203.1537980180.09
881664517391626500.329297800.02
9024428465200.04492710.00
92346-3510180.0162860.00
96120-395210.0025400.00
9714-3414220.003210.00
9948504152158200.8410136660.02
1003406754-13442658.77916302702.14
110679093-38385011.72345035530.81
11193457-3179831.6177732180.18
13018891743157433.2681308150.19
2102009065641855283.4856973360.13
212270816813630.00175310.00
222299964343855395.18117407400.27
240213295-3535363.6878251380.18
2411-1191191190.001190.00
242159-13314490.0078030.00
24319-12014430.008210.00
245579648212111590100.0052433417412.27
24658738423523079854014.19336356850.79
247208010302218560.051742150.00
250767016259541613.23124531080.29
2545948-1249160.10996700.00
25512137870622924392.2250848780.12
2564940-678250.091248090.00
25714592-95690.251357140.00
2581-1111110.00110.00
2605762458968455299.413043888337.12
26132965-33316630.5720807530.05
26230-8017360.0010890.00
26398259-62581.707862400.02
26511184652925661.9374176960.17
270126921316960.00130260.00
30057290841556063953199.111806828984.23
3025-6550.00290.00
3057-6432490.003460.00
30647944-3948160.837733440.02
3072-3027280.00570.00
310610607-19851410.5386367940.20
315113-6510130.0015750.00
32147407141792449311.0619635120.05
34212141497410.0010850.00
3434-5928460.001860.00
35021079062275103.6421083930.05
35137931763211550.01592910.00
35239110311180.007300.00
35551413580.001550.00
3601-9990.0090.00
3625767885879266553010.96192964950.45
400818-10917420.01344120.00
4102094910525810640.3613583600.03
411140-15927570.0080270.00
4406425481410824044011.33263621890.62
4907146942483343444312.76321524980.75
4912-3232320.00640.00
50030911001883524378544985.822459147515.75
501120425026949870.2110569430.02
50231393564549480.5415283930.04
50336-17426890.0032060.00
504201701612756109464335.02881658272.06
5054353325782706653117.611372212383.21
5069035642315510.164647080.01
50742056-14612260.7311354990.03
508429842710368670.7429068030.07
5104650365063456350.9118789130.04
511216293181017675633.76138419770.32
51376411559270.01208360.00
5144-4128330.001340.00
51511308614264107911562.2072194840.17
5165960583397320.101941950.00
5187082339103312661.2246958540.11
520373488724998851736.46648351661.52
5212114510575555330.387337680.02
52279-2899530.0042640.00
5233-6742530.001610.00
524296-29536870.01259330.00
5251737637571514540.319652180.02
52630-5855560.0016890.00
5272-5629420.00850.00
53013911961059888692.51101452420.24
5339360442951452131451.69142929790.33
534767825931181030.137946410.02
5356-13649950.005740.00
53616793348891010.031738560.00
538674501205014908891.3771208990.17
540355457812804910.6132454390.08
5412886369003227760.6227190480.06
544504391661270.0068780.00
545414131797162830.011210960.00
546722901546769401.2529482030.07
5471731666311180.00206840.00
550757902948122671101.3687277330.20
5526-779193090.0018580.00
555119792878789850.2110456430.02
556681445117670.01462040.00
56142751345625710.073067110.01
5621-3636360.00360.00
5654-2819240.00970.00
56742270811600.009630.00
57081-33123570.0046540.00
58010310812125116381031.99119166020.28
581324783316241550.065165520.01
5831257627612430.02552210.00
58510033527911810.02842940.00
5865313223718430.01243530.00
60052453815788332473911.77271615700.64
610397411668594228498.01229817860.54
611949487326012530.185566100.01
63081302151992407351.6634343910.08
6482-9880.00170.00
65043460864700222305435156.073236159547.57
651108785658924327663928.93660886201.55
6523-5829480.001440.00
6539739146110676290.193276760.01
654153910018540.0029560.00
655244233125000918326.37120728570.28
6563-3831340.001030.00
65727-5818220.006160.00
6901180053751398450.307870850.02
691284321111612530.051640580.00
6922-3728320.00650.00
69312004914510650.02822210.00
69410-16153660.006630.00
69520-6536370.007510.00
69911119100.00200.00
700162792176881251342941.35705645851.65
710128693837151537444728.61787734701.84
7113085312732909830.5526923640.06
7205-7920460.002320.00
7307231362483596341.3627207770.06
7403098591688543865338.26161774830.38
752158194179171176463.0481173490.19
7532721916936190.06711700.00
7551734922360.007360.00
76096067361835460.184848190.01
7621226130513780.00143790.00
7651208443178700.02878830.00
7671384739614830.00155070.00
770557219504177790.135952190.01
77283428794847750.166984530.02
773131519926813910.2312115690.03
774184347151260.0027760.00
77535311144064837710.8635626200.08
7768132249896647731.4963052630.15
77727735832959690.062334350.01
780256899256978946804.88227171510.53
785228946381398955784.61209280480.49
78723386651110118840.5225243590.06
800454692931626510.7923786950.06
81090701184032618811.6075446020.18
8119688275251180.021155310.00
830342060147764345566.16200848030.47
84028863118714440.051296000.00
8504070516337135207.0382522160.19
85280810621396581.4047516500.11
8533589673791808290.7512721410.03
8544-4528370.001510.00
85653355726531251958413.78672604741.57
86335882740128510280.7512313890.03
8643-3219240.00720.00
8712231110832670.00157040.00
880592143136524650.031323970.00
886442818724790.0056950.00
9063054-4747470.051435380.00
9873973-1574320.071300970.00
9992260-7770.04158200.00

To learn more about ITS.MARC, please contact TLC at 1.800.325.7759 or email us at info@tlcdelivers.com.

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