British Backfile

British Backfile contains older MARC bibliographic records from The British Library.

The Library Corporation, Research Park, Inwood, WV 25428

Overall Statistics

Description	Maximum	Minimum	Average	Totals
Number of Records	-	-	-	4035317
Characters per Record	28648	194	428	1729903758
Characters per Field	2562	2	31	1508275399
Fields per Record	200	9	11	48345257

Record Status (MARC Leader Position 05)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
New	n	4035317	100.00	1729903646	100.00

Record Type (MARC Leader Position 06)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Language Material	a	4035304	100.00	1729894239	100.00
Printed Music	c	1	0.00	1208	0.00
Printed Map	e	10	0.00	6899	0.00
Nonmusical Sound Recording	i	1	0.00	417	0.00
Manuscript Material	t	1	0.00	883	0.00

Bibliographic Level (MARC Leader Position 07)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Monographic Component	a	45665	1.13	23583377	1.36
Serial Component	b	1	0.00	708	0.00
Monograph Item	m	3877410	96.09	1655758017	95.71
Serial	s	112241	2.78	50561544	2.92

Control Type (MARC Leader Position 08)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
No Specified Type	[blank]	4035317	100.00	1729903646	100.00

Character Encoding (MARC Leader Position 09)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
MARC-8	[blank]	4035317	100.00	1729903646	100.00

Encoding Level (MARC Leader Position 17)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Full Level	[blank]	1768	0.04	1674068	0.10
Full; Unexamined	1	39	0.00	27624	0.00
Abbreviated Level	3	4030753	99.89	1725788716	99.76
Preliminary Level	5	1	0.00	326	0.00
Minimal Level	7	1645	0.04	1386925	0.08
Unknown Level	u	1110	0.03	1025088	0.06
Unknown Code	[unprintable]	1	0.00	899	0.00

Descriptive Cataloging Form (MARC Leader Position 18)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Non ISBD Form	[blank]	4031277	99.90	1726321099	99.79
AACR2	a	3561	0.09	3064464	0.18
ISBD Form	i	403	0.01	456327	0.03
Unknown	u	75	0.00	60857	0.00
Unknown Code	[unprintable]	1	0.00	899	0.00

Linked Record Requirement (MARC Leader Position 19)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Related Record not Required	[blank]	4035317	100.00	1729903646	100.00

Modified Record (MARC 008 Position 38)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Not modified	[blank]	4035228	100.00	1729828924	100.00
Dashed-on Omit.	d	5	0.00	7698	0.00
Romanized	o	11	0.00	9577	0.00
Romanized script	r	67	0.00	53824	0.00
Missing Characters	x	1	0.00	727	0.00
No attempt to code	|	5	0.00	2896	0.00

Cataloging Source (MARC 008 Position 39)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Library of Congress	[blank]	4034394	99.98	1728955414	99.95
LC Coop. Cat.	c	19	0.00	17957	0.00
Other Sources	d	853	0.02	882646	0.05
Unknown Source	u	12	0.00	11822	0.00
No attempt to code	|	39	0.00	35807	0.00

Target Audience (MARC 008 Position 22)

Description	MARC Code	Record Count	Percent of Records	File Space Consumed	Percent of File Space
Unknown or not spec.	[blank]	2363	0.06	1734181	0.10
Juvenile	j	201	0.00	96711	0.01
No attempt to code	|	3920501	97.15	1677503603	96.97

Collection Age (MARC 008 Position 07-10)

Description	Record Count	Percent of Records	File Space Consumed	Percent of File Space
--- 2005 ---	3	0.00	2512	0.00
--- 2004 ---	3	0.00	1842	0.00
--- 2003 ---	3	0.00	1792	0.00
--- 2002 ---	2	0.00	900	0.00
--- 2001 ---	6	0.00	4158	0.00
--- 2000 ---	22	0.00	11577	0.00
--- 1999 ---	4	0.00	2445	0.00
--- 1998 ---	4	0.00	2274	0.00
--- 1997 ---	7	0.00	4121	0.00
--- 1996 ---	5	0.00	2953	0.00
--- 1995 ---	6	0.00	4077	0.00
--- 1994 ---	6	0.00	3694	0.00
--- 1993 ---	10	0.00	5733	0.00
--- 1992 ---	7	0.00	3551	0.00
--- 1991 ---	10	0.00	5126	0.00
--- 1990 ---	8	0.00	5375	0.00
1980 - 1989	333	0.01	178005	0.01
1970 - 1979	213415	5.29	90463794	5.23
1960 - 1969	460634	11.42	187629919	10.85
1950 - 1959	344614	8.54	136646511	7.90
1940 - 1949	221878	5.50	86753416	5.01
1930 - 1939	288797	7.16	112080921	6.48
1920 - 1929	232868	5.77	90769438	5.25
1910 - 1919	192840	4.78	77182350	4.46
1900 - 1909	198382	4.92	81063838	4.69
1890 - 1899	190477	4.72	76735375	4.44
1880 - 1889	172962	4.29	71651587	4.14
1870 - 1879	152243	3.77	63097847	3.65
1860 - 1869	171382	4.25	69399878	4.01
1850 - 1859	144833	3.59	60609463	3.50
1840 - 1849	112009	2.78	48102276	2.78
1830 - 1839	87432	2.17	38607255	2.23
1820 - 1829	73627	1.82	33757322	1.95
1810 - 1819	56080	1.39	26777298	1.55
1800 - 1809	47909	1.19	22991538	1.33
1790 - 1799	69497	1.72	33034417	1.91
1780 - 1789	44959	1.11	21973449	1.27
1770 - 1779	29755	0.74	14961198	0.86
1760 - 1759	26211	0.65	13306304	0.77
1750 - 1759	25812	0.64	13384032	0.77
1740 - 1749	21918	0.54	11650511	0.67
1730 - 1739	21489	0.53	11535964	0.67
1720 - 1729	21862	0.54	11741942	0.68
1710 - 1719	23684	0.59	12789254	0.74
1700 - 1709	21567	0.53	11510801	0.67
1600 - 1699	169605	4.20	94037420	5.44
1500 - 1599	74692	1.85	44515328	2.57
1400 - 1499	10942	0.27	8693080	0.50
1300 - 1399	45	0.00	21806	0.00
1200 - 1299	50	0.00	26401	0.00
1100 - 1199	34	0.00	15480	0.00
1000 - 1099	77	0.00	35933	0.00
Pre 1000	1	0.00	400	0.00
No Date	110296	2.73	52109765	3.01

Languages (MARC 008 Position 35-37)

Description	Record Count	Percent of Records	File Space Consumed	Percent of File Space
NOT CODED	8	0.00	4903	0.00
ENGLISH	17426	0.43	9100277	0.53
FRENCH	950	0.02	559916	0.03
GERMAN	1533	0.04	924604	0.05
SPANISH	203	0.01	119362	0.01
AFRO-ASIAT	1	0.00	438	0.00
AFRICAANS	78	0.00	35014	0.00
ALBANIAN	1	0.00	716	0.00
ALGONQUIAN	1	0.00	993	0.00
ARABIC	5	0.00	6999	0.00
ARMENIAN	1	0.00	755	0.00
BALUCHI	1	0.00	914	0.00
BASQUE	1	0.00	387	0.00
BYELORUSSIAN	2	0.00	839	0.00
BANGALI	8	0.00	4853	0.00
BULGARIAN	9	0.00	5178	0.00
BURMESE	3	0.00	1437	0.00
CATALAN	5	0.00	2717	0.00
CHINESE	3	0.00	1360	0.00
COPTIC	5	0.00	3754	0.00
CREE	1	0.00	363	0.00
CZECH	19	0.00	11666	0.00
DANISH	37	0.00	20368	0.00
DUTCH	221	0.01	128685	0.01
EGYPTIAN	3	0.00	2055	0.00
ENGLISH,OLD	4	0.00	2858	0.00
ESTONIAN	3	0.00	1611	0.00
FINNISH	11	0.00	6070	0.00
FRENCH MIDDLE	1	0.00	643	0.00
FRENCH OLD	1	0.00	1220	0.00
GERMANIC	1	0.00	691	0.00
GREEK ANCIE	13	0.00	13008	0.00
GREEK	24	0.00	20508	0.00
HAWAIIAN	2	0.00	555	0.00
HEBREW	28	0.00	31192	0.00
HUNGARIAN	189	0.00	89575	0.01
IGBO	1	0.00	299	0.00
ICELANDIC	1	0.00	385	0.00
IROQUOIAN	5	0.00	3162	0.00
ITALIAN	221	0.01	143180	0.01
KONGO	1	0.00	500	0.00
LADINO	1	0.00	1730	0.00
LATIN	396	0.01	278588	0.02
LATVIAN	1	0.00	450	0.00
LITHUANIAN	2	0.00	2041	0.00
MACEDONIAN	2	0.00	1559	0.00
MARATHI	1	0.00	691	0.00
MISCELLANEOUS	2	0.00	1323	0.00
MOHAWK	20	0.00	12135	0.00
MOLDAVIAN	1	0.00	757	0.00
MULTI. LANGUAGE	118	0.00	99723	0.01
NIGER-KORDOFAN	1	0.00	512	0.00
NORWEGIAN	13	0.00	7427	0.00
NYANJA	1	0.00	367	0.00
OTTOMAN TURK	3	0.00	3163	0.00
POLISH	39	0.00	25733	0.00
PORTUGUESE	83	0.00	42875	0.00
PROVENCAL OLD	3	0.00	1257	0.00
RAETO-ROMANCE	6	0.00	2533	0.00
ROMANIAN	8	0.00	8314	0.00
RUSSIAN	133	0.00	84969	0.00
SERBO-CYRILLIC	10	0.00	5726	0.00
SCOTS	4	0.00	1880	0.00
SERBO-ROMAN	16	0.00	9717	0.00
SHAN	1	0.00	361	0.00
SINO TIBETAN	1	0.00	421	0.00
SLOVAK	4	0.00	1759	0.00
SLOVENIAN	11	0.00	6660	0.00
SORBIAN LANGUAGE	2	0.00	1814	0.00
SWAHILI	1	0.00	564	0.00
SWEDISH	45	0.00	25040	0.00
SYRIAC	2	0.00	2164	0.00
TAMIL	6	0.00	3853	0.00
TURKISH	1	0.00	562	0.00
UKRAINIAN	5	0.00	2794	0.00
UNDETERMINED	38	0.00	18431	0.00
VIETNAMESE	3	0.00	1100	0.00
WELSH	38	0.00	13534	0.00
YIDDISH	632	0.02	560118	0.03
YORUBA	2	0.00	690	0.00
Unknown Code	4012630	99.44	1717416301	99.28

Census of MARC Fields Used in the Collection

Tag	Records with Tag	Repeated Fields	Max Length	Min Length	Averge Length	Percent of Records	File Space Consumed	Percent of File Space
1	4035317	1	23	9	9	100.00	36317876	2.10
3	4035317	-	2	2	2	100.00	8070634	0.47
5	4035317	-	16	16	16	100.00	64565072	3.73
6	266	-	18	17	17	0.01	4785	0.00
7	2586	-	14	2	4	0.06	10448	0.00
8	4035317	-	40	40	40	100.00	161412680	9.33
10	855	-	64	12	15	0.02	12912	0.00
15	786	1	19	9	17	0.02	13965	0.00
16	69	31	30	13	18	0.00	1880	0.00
19	4035317	9986	17	10	13	100.25	56619380	3.27
20	106571	255	73	8	14	2.65	1503439	0.09
22	2491	2	57	13	14	0.06	36571	0.00
25	4	-	19	13	16	0.00	65	0.00
30	260	-	16	9	9	0.01	2579	0.00
32	129	-	16	16	16	0.00	2064	0.00
35	576	64	52	9	20	0.02	13232	0.00
37	227	-	185	7	51	0.01	11636	0.00
40	4035316	2	216	6	10	100.00	40395581	2.34
41	1043	-	37	7	12	0.03	13075	0.00
42	956	4	30	6	10	0.02	10529	0.00
43	312	1	29	11	11	0.01	3660	0.00
44	22	-	21	10	12	0.00	266	0.00
45	3	-	8	8	8	0.00	24	0.00
46	9	-	17	5	14	0.00	129	0.00
50	1003	8	52	5	15	0.03	15497	0.00
51	11	-	64	10	27	0.00	307	0.00
52	15	-	18	14	15	0.00	228	0.00
55	8	-	10	6	8	0.00	66	0.00
60	96	1	19	12	13	0.00	1355	0.00
66	516	-	6	6	6	0.01	3096	0.00
70	28	-	17	10	13	0.00	385	0.00
72	23	12	14	8	8	0.00	289	0.00
74	1	3	19	10	15	0.00	63	0.00
80	2	-	7	6	6	0.00	13	0.00
82	5460	39	34	7	11	0.14	63788	0.00
84	592	62	25	14	19	0.02	12632	0.00
86	3	-	36	8	23	0.00	70	0.00
100	3092246	-	248	6	29	76.63	91427012	5.29
110	427956	-	468	8	52	10.61	22410821	1.30
111	1760	-	203	15	52	0.04	92271	0.01
130	46601	-	193	10	43	1.15	2010818	0.12
210	1372	-	71	7	22	0.03	30981	0.00
222	1681	-	128	7	33	0.04	56247	0.00
240	385030	1	907	6	36	9.54	14034814	0.81
242	1	-	23	23	23	0.00	23	0.00
245	4035317	-	2562	6	98	100.00	397751732	22.99
246	1149	413	360	6	44	0.04	69498	0.00
247	7	4	125	31	70	0.00	775	0.00
250	178177	-	1031	10	46	4.42	8348692	0.48
255	1	-	17	17	17	0.00	17	0.00
260	3767787	242	931	5	35	93.38	135399860	7.83
262	1	-	21	21	21	0.00	21	0.00
265	1	-	70	70	70	0.00	70	0.00
300	3643146	33	303	5	9	90.28	35311611	2.04
310	1916	15	178	9	16	0.05	32062	0.00
321	434	142	95	10	27	0.01	16033	0.00
362	1926	77	405	6	33	0.05	66473	0.00
440	453716	233	834	7	52	11.25	23668486	1.37
490	260	8	156	9	59	0.01	15995	0.00
500	445259	7661	1997	7	66	11.22	30041139	1.74
501	2	-	340	56	198	0.00	396	0.00
502	9	-	96	19	54	0.00	488	0.00
504	492	4	128	9	39	0.01	19479	0.00
505	320	29	1879	19	345	0.01	120642	0.01
508	4	-	82	34	56	0.00	226	0.00
510	142	20	126	11	33	0.00	5411	0.00
515	411	98	459	20	61	0.01	31353	0.00
520	64	8	255	19	74	0.00	5393	0.00
525	130	9	715	19	70	0.00	9866	0.00
530	271	40	317	22	60	0.01	18832	0.00
533	1	-	65	65	65	0.00	65	0.00
534	1	-	40	40	40	0.00	40	0.00
538	1	1	151	112	131	0.00	263	0.00
540	2507	7	47	36	41	0.06	104692	0.01
541	10	-	50	20	24	0.00	243	0.00
546	362	7	133	13	40	0.01	14819	0.00
550	439	18	649	19	128	0.01	58813	0.00
555	418	23	613	17	77	0.01	34388	0.00
561	87	2	391	34	90	0.00	8023	0.00
562	1	1	87	41	64	0.00	128	0.00
563	8	1	154	43	81	0.00	735	0.00
580	396183	35566	1408	11	100	10.70	43272974	2.50
600	11605	395	304	10	23	0.30	285867	0.02
610	806	59	286	10	45	0.02	39152	0.00
611	8	1	92	35	57	0.00	515	0.00
630	147	23	144	10	36	0.00	6236	0.00
650	13927	4538	95	8	30	0.46	566492	0.03
651	7477	1991	92	9	36	0.23	342191	0.02
653	1399	103	141	9	42	0.04	63947	0.00
655	12734	168	827	12	34	0.32	438828	0.03
700	991904	289946	1012	8	34	31.77	44349411	2.56
710	49365	5331	693	9	62	1.36	3445252	0.20
711	472	6	447	15	52	0.01	25065	0.00
720	564566	41987	869	5	34	15.03	21085323	1.22
730	27177	1052	403	8	44	0.70	1265452	0.07
740	2863	130	501	8	40	0.07	120895	0.01
752	261	-	43	17	24	0.01	6395	0.00
760	10	2	75	19	45	0.00	546	0.00
762	1	-	65	65	65	0.00	65	0.00
765	5	-	76	29	48	0.00	244	0.00
767	6	5	65	31	44	0.00	487	0.00
770	180	55	122	13	48	0.01	11280	0.00
772	62	8	93	21	43	0.00	3066	0.00
773	3	-	119	43	77	0.00	233	0.00
774	2	-	67	24	45	0.00	91	0.00
775	113961	62671	1449	15	188	4.38	33219318	1.92
776	424	34	123	9	47	0.01	21755	0.00
777	24	13	144	15	74	0.00	2743	0.00
780	778	143	203	7	48	0.02	44267	0.00
785	882	139	168	7	49	0.03	50185	0.00
787	329364	44592	1680	10	132	9.27	49676724	2.87
793	1	-	50	50	50	0.00	50	0.00
800	54	-	94	52	70	0.00	3813	0.00
810	8	-	121	47	79	0.00	633	0.00
830	131	52	130	13	60	0.00	11027	0.00
852	4035317	236249	1516	23	39	105.85	170295406	9.84
856	25	21	266	32	126	0.00	5813	0.00
866	177596	28399	1050	7	43	5.10	9030714	0.52
880	677	1402	1199	21	90	0.05	188832	0.01
916	1	-	14	14	14	0.00	14	0.00
959	1953	-	35	22	27	0.05	54081	0.00

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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