QA catalogue for analysing library data

British Library     last data update: 2020-11-26     number of records: 18,787,911

Completeness

by document types: all · Books · Computer Files · Continuing Resources · Maps · Mixed Materials · Music · Visual Materials
number of records: 245,990

field groups

tags label count %

Fields defined in MARC21
01X-09X Numbers and Code
 
 244,505 99.40
1XX Main Entry
 
 65,418 26.59
20X-24X Title
 
 245,990 100.00
25X-28X Edition, Imprint
 
 244,363 99.34
3XX Physical Description
 
 245,725 99.89
4XX Series Statement
 
 13,740 5.59
5XX Note
 
 100,063 40.68
6XX Subject Access
 
 238,428 96.93
70X-75X Added Entry
 
 58,431 23.75
76X-78X Linking Entry
 
 52,009 21.14
80X-83X Series Added Entry
 
 4,811 1.96
841-88X Holdings, Location, Alternate Graphics
 
 239,889 97.52

Fields defined in extensions of MARC
OCLC OCLCMARC tags
 
 159,283 64.75
BL Locally defined tags of the British Library
 
 245,990 100.00
unknown unknown origin
 
 245,990 100.00

fields

records occurences
path label terms count % count min max mean stddev
01X-09X: Numbers and Code
010 — Library of Congress Control Number
$a LC control number
 
 1,850 0.75 1,850 1 8 1.00 0.00
$z Canceled/invalid LC control number
 
 75 0.03 77 1 15 1.15 0.00
015 — National Bibliography Number
$2 Source
 
 1,037 0.42 1,037 1 5 1.00 0.00
$a National bibliography number
 
 1,081 0.44 1,081 1 6 1.00 0.00
016 — National Bibliographic Agency Control Number
$2 Source
 
 13 0.01 13 1 6 1.00 0.00
$a Record control number
 
 8,278 3.37 8,286 1 7 1.00 0.00
017 — Copyright or Legal Deposit Number
$a Copyright or legal deposit number
 
 18 0.01 22 1 4 1.01 0.00
$b Assigning agency
 
 16 0.01 16 1 2 1.00 0.00
020 — International Standard Book Number
$9
 
 1 0.00 2 1 2 1.30 0.01
$Z
 
 1 0.00 1 1 1 1.00 0.00
$a International Standard Book Number
 
 13,968 5.68 17,875 1 158 1.38 0.00
$b
 
 3 0.00 3 1 2 1.02 0.00
$c Terms of availability
 
 2,481 1.01 3,377 1 144 1.42 0.00
$q Qualifying information
 
 748 0.30 832 1 335 2.22 0.00
$z Canceled/invalid ISBN
 
 427 0.17 553 1 219 1.45 0.00
022 — International Standard Serial Number
$2 Source
 
 1 0.00 1 1 2 1.00 0.00
$a International Standard Serial Number
 
 7 0.00 7 1 4 1.00 0.00
024 — Other Standard Identifier
$2 Source of number or code
 
 6 0.00 6 1 4 1.04 0.00
$a Standard number or code
 
 28 0.01 29 1 62 1.11 0.00
$z Canceled/invalid standard number or code
 
 1 0.00 1 1 4 1.03 0.00
025 — Overseas Acquisition Number
$a Overseas acquisition number
 
 33 0.01 33 1 2 1.00 0.00
028 — Publisher or Distributor Number
$a Publisher or distributor number
 
 2 0.00 2 1 45 1.33 0.00
$b Source
 
 2 0.00 2 1 45 1.44 0.00
034 — Coded Cartographic Mathematical Data
$2 Source
 
 20,726 8.43 21,007 1 8 1.02 0.00
$a Category of scale
 
 74,255 30.19 75,262 1 8 1.01 0.00
$b Constant ratio linear horizontal scale
 
 90,536 36.80 93,642 1 9 1.04 0.00
$c Constant ratio linear vertical scale
 
 25 0.01 26 1 2 1.03 0.03
$d Coordinates - westernmost longitude
 
 35,038 14.24 35,820 1 8 1.02 0.00
$e Coordinates - easternmost longitude
 
 35,038 14.24 35,820 1 8 1.02 0.00
$f Coordinates - northernmost latitude
 
 35,038 14.24 35,820 1 8 1.02 0.00
$g Coordinates - southernmost latitude
 
 35,038 14.24 35,820 1 8 1.02 0.00
$p Equinox
 
 1 0.00 1 1 1 1.00 0.00
$s G-ring latitude
 
 4 0.00 20 5 5 5.00 0.00
$t G-ring longitude
 
 4 0.00 20 5 5 5.00 0.00
035 — System Control Number
$9
 
 4 0.00 4 1 2 1.00 0.00
$a System control number
 
 33,058 13.44 33,732 1 14 1.11 0.00
$z Canceled/invalid control number
 
 610 0.25 749 1 56 1.45 0.00
037 — Source of Acquisition
$a Stock number
 
 1,718 0.70 3,695 1 17 1.01 0.00
$b Source of stock number/acquisition
 
 1,717 0.70 3,696 1 17 1.01 0.00
$c Terms of availability
 
 2 0.00 2 1 8 1.01 0.00
$f Form of issue
 
 1 0.00 1 1 17 1.02 0.00
$g Additional format characteristics
 
 1 0.00 1 1 1 1.00 0.00
038 — Record Content Licensor
$a Record content licensor
 
 693 0.28 693 1 1 1.00 0.00
040 — Cataloging Source
$a Original cataloging agency
 
 239,313 97.29 239,313 1 4 1.00 0.00
$b Language of cataloging
 
 47,756 19.41 47,756 1 3 1.00 0.00
$c Transcribing agency
 
 238,695 97.03 238,695 1 3 1.00 0.00
$d Modifying agency
 
 34,888 14.18 76,267 1 99 1.97 0.00
$e Description conventions
 
 31,611 12.85 37,330 1 4 1.19 0.00
041 — Language Code
$a Language code of text/sound track or separate title
 
 8,732 3.55 17,472 1 25 1.37 0.00
$b Language code of summary or abstract
 
 938 0.38 1,875 1 21 1.24 0.00
$d Language code of sung or spoken text
 
 1 0.00 1 1 7 1.27 0.03
$e Language code of librettos
 
 4 0.00 4 1 12 1.69 0.00
$f Language code of table of contents
 
 11 0.00 12 1 23 1.19 0.01
$g Language code of accompanying material other than librettos
 
 12 0.00 17 1 7 1.62 0.00
$h Language code of original
 
 120 0.05 150 1 11 1.02 0.00
$j Language code of subtitles or captions
 
 2 0.00 8 1 7 1.26 0.03
$k Language code of intermediate translations
 
 7 0.00 7 1 2 1.03 0.00
042 — Authentication Code
$a Authentication code
 
 30,538 12.41 30,540 1 5 1.01 0.00
043 — Geographic Area Code
$2 Source of local code
 
 11 0.00 11 1 1 1.00 0.00
$a Geographic area code
 
 14,491 5.89 17,804 1 11 1.15 0.00
$b Local GAC code
 
 14 0.01 14 1 3 1.04 0.01
044 — Country of Publishing/Producing Entity Code
$a MARC country code
 
 3 0.00 4 1 10 2.15 0.00
$c ISO country code
 
 2 0.00 2 1 5 1.17 0.00
045 — Time Period of Content
$a Time period code
 
 93 0.04 95 1 7 1.42 0.00
$b Formatted 9999 B.C. through C.E. time period
 
 455 0.18 511 1 6 1.29 0.00
$c Formatted pre-9999 B.C. time period
 
 1 0.00 1 1 1 1.00 0.00
050 — Library of Congress Call Number
$a Classification number
 
 3,104 1.26 3,129 1 8 1.02 0.00
$b Item number
 
 2,951 1.20 2,971 1 4 1.01 0.00
$u
 
 1 0.00 1 1 1 1.00 0.00
052 — Geographic Classification
$2 Code source
 
 193,420 78.63 198,949 1 10 1.03 0.00
$a Geographic classification area code
 
 203,616 82.77 212,972 1 10 1.04 0.00
$b Geographic classification subarea code
 
 6,904 2.81 11,687 1 11 1.68 0.00
$d Populated place name
 
 3 0.00 3 1 1 1.00 0.00
055 — Classification Numbers Assigned in Canada
$a Classification number
 
 23 0.01 23 1 4 1.55 0.00
$b Item number
 
 20 0.01 20 1 4 1.26 0.00
060 — National Library of Medicine Call Number
$a Classification number
 
 3 0.00 3 1 4 1.27 0.00
066 — Character Sets Present
$c Alternate G0 or G1 character set
 
 8 0.00 8 1 3 1.09 0.00
070 — National Agricultural Library Call Number
$a Classification number
 
 43 0.02 43 1 3 1.00 0.00
$b Item number
 
 42 0.02 42 1 2 1.00 0.00
072 — Subject Category Code
$2 Source
 
 222 0.09 254 1 53 1.85 0.00
$a Subject category code
 
 238 0.10 276 1 53 1.85 0.00
074 — GPO Item Number
$a GPO item number
 
 8,123 3.30 8,771 1 10 1.33 0.00
080 — Universal Decimal Classification Number
$a Universal Decimal Classification number
 
 10 0.00 11 1 16 1.12 0.00
082 — Dewey Decimal Classification Number
$2 Edition number
 
 33,378 13.57 35,536 1 10 1.12 0.00
$a Classification number
 
 33,460 13.60 35,999 1 10 1.12 0.00
$b Item number
 
 9 0.00 10 1 3 1.01 0.00
$q Assigning agency
 
 34 0.01 34 1 1 1.00 0.00
084 — Other Classificaton Number
$2 Number source
 
 498 0.20 815 1 22 1.23 0.00
$a Classification number
 
 505 0.21 822 1 22 1.25 0.00
$b Item number
 
 1 0.00 1 1 3 1.02 0.01
$q Assigning agency
 
 1 0.00 1 1 6 1.27 0.00
086 — Government Document Classification Number
$2 Number source
 
 12 0.00 12 1 2 1.02 0.00
$a Classification number
 
 8,151 3.31 8,202 1 28 1.01 0.00
$z Canceled/invalid classification number
 
 230 0.09 242 1 14 1.10 0.00
088 — Report Number
$a Report number
 
 15 0.01 17 1 28 1.07 0.00
1XX: Main Entry
100 — Main Entry - Personal Name
$,
 
 1 0.00 1 1 1 1.00 0.00
$0 Authority record control number or standard number
 
 8 0.00 8 1 3 1.02 0.00
$4 Relator code
 
 2 0.00 3 1 3 1.00 0.00
$6 Linkage
 
 13 0.01 13 1 2 1.00 0.00
$a Personal name
 
 20,697 8.41 20,697 1 7 1.00 0.00
$b Numeration
 
 9 0.00 9 1 2 1.00 0.00
$c Titles and words associated with a name
 
 517 0.21 524 1 3 1.02 0.00
$d Dates associated with a name
 
 14,318 5.82 14,318 1 2 1.00 0.00
$e Relator term
 
 8,715 3.54 10,595 1 4 1.02 0.00
$q Fuller form of name
 
 856 0.35 856 1 2 1.00 0.00
$v
 
 1 0.00 1 1 1 1.00 0.00
110 — Main Entry - Corporate Name
$0 Authority record control number or standard number
 
 18 0.01 21 1 2 1.02 0.00
$4 Relator code
 
 3 0.00 3 1 1 1.00 0.00
$6 Linkage
 
 83 0.03 83 1 2 1.00 0.00
$E
 
 2 0.00 2 1 1 1.00 0.00
$I
 
 3 0.00 3 1 1 1.00 0.00
$a Corporate name or jurisdiction name as entry element
 
 44,719 18.18 44,719 1 2 1.00 0.00
$b Subordinate unit
 
 23,673 9.62 35,815 1 6 1.41 0.00
$c Location of meeting
 
 2 0.00 2 1 1 1.00 0.00
$d Date of meeting or treaty signing
 
 8 0.00 8 1 2 1.00 0.00
$e Relator term
 
 6,832 2.78 6,940 1 3 1.05 0.00
$p Name of part/section of a work
 
 1 0.00 1 1 1 1.00 0.00
$t Title of a work
 
 22 0.01 22 1 1 1.00 0.00
111 — Main Entry - Meeting Name
$a Meeting name or jurisdiction name as entry element
 
 8 0.00 8 1 1 1.00 0.00
$c Location of meeting
 
 2 0.00 2 1 5 1.00 0.00
$d Date of meeting
 
 4 0.00 4 1 2 1.00 0.00
$n Number of part/section/meeting
 
 1 0.00 1 1 2 1.00 0.00
130 — Main Entry - Uniform Title
$a Uniform title
 
 12 0.00 12 1 1 1.00 0.00
$f Date of a work
 
 1 0.00 1 1 1 1.00 0.00
$k Form subheading
 
 1 0.00 1 1 2 1.00 0.00
$l Language of a work
 
 4 0.00 4 1 1 1.00 0.00
20X-24X: Title
240 — Uniform Title
$a Uniform title
 
 78 0.03 78 1 4 1.00 0.00
$f Date of a work
 
 4 0.00 4 1 1 1.00 0.00
$k Form subheading
 
 8 0.00 8 1 2 1.00 0.00
$l Language of a work
 
 17 0.01 17 1 4 1.00 0.00
$p Name of part/section of a work
 
 3 0.00 3 1 4 1.02 0.00
242 — Translation of Title by Cataloging Agency
$a Title
 
 1,891 0.77 1,891 1 5 1.04 0.00
$b Remainder of title
 
 3 0.00 3 1 1 1.00 0.00
$y Language code of translated title
 
 1,881 0.76 1,881 1 1 1.00 0.00
245 — Title Statement
$6 Linkage
 
 150 0.06 150 1 2 1.00 0.00
$P
 
 3 0.00 3 1 1 1.00 0.00
$U
 
 1 0.00 1 1 1 1.00 0.00
$a Title
 
 245,987 100.00 245,987 1 6 1.00 0.00
$b Remainder of title
 
 20,479 8.33 20,482 1 4 1.00 0.00
$c Statement of responsibility, etc.
 
 26,934 10.95 26,934 1 2 1.00 0.00
$e
 
 2 0.00 2 1 4 1.31 0.01
$h Medium
 
 4,255 1.73 4,255 1 2 1.00 0.00
$n Number of part/section of a work
 
 294 0.12 297 1 9 1.03 0.00
$p Name of part/section of a work
 
 1,033 0.42 1,088 1 29 1.06 0.00
246 — Varying Form of Title
$6 Linkage
 
 52 0.02 60 1 14 1.17 0.00
$a Title proper/short title
 
 13,380 5.44 17,693 1 41 1.24 0.00
$b Remainder of title
 
 1,687 0.69 1,919 1 11 1.09 0.00
$c
 
 2 0.00 2 1 2 1.00 0.00
$f Date or sequential designation
 
 8 0.00 8 1 9 1.30 0.00
$g Miscellaneous information
 
 2 0.00 2 1 2 1.03 0.00
$h Medium
 
 1 0.00 1 1 3 1.08 0.02
$i Display text
 
 4,943 2.01 5,282 1 26 1.11 0.00
$n Number of part/section of a work
 
 9 0.00 9 1 7 1.19 0.00
$p Name of part/section of a work
 
 88 0.04 99 1 14 1.39 0.00
247 — Former Title
$a Title
 
 1 0.00 2 1 8 1.27 0.02
$f Date or sequential designation
 
 1 0.00 2 1 6 1.29 0.01
25X-28X: Edition, Imprint
250 — Edition Statement
$6 Linkage
 
 50 0.02 50 1 6 1.00 0.00
$a Edition statement
 
 43,998 17.89 44,033 1 6 1.00 0.00
$b Remainder of edition statement
 
 51 0.02 51 1 3 1.00 0.00
255 — Cartographic Mathematical Data
$6 Linkage
 
 5 0.00 5 1 1 1.00 0.00
$a Statement of scale
 
 140,107 56.96 141,169 1 8 1.01 0.00
$b Statement of projection
 
 7,704 3.13 7,928 1 6 1.03 0.00
$c Statement of coordinates
 
 35,094 14.27 35,870 1 8 1.02 0.00
$d Statement of zone
 
 6 0.00 6 1 1 1.00 0.00
$f Outer G-ring coordinate pairs
 
 4 0.00 4 1 1 1.00 0.00
256 — Computer File Characteristics
$a Computer file characteristics
 
 83 0.03 83 1 1 1.00 0.00
260 — Publication, Distribution, etc. (Imprint)
$6 Linkage
 
 18 0.01 18 1 6 1.00 0.00
$a Place of publication, distribution, etc.
 
 98,250 39.94 99,449 1 20 1.10 0.00
$b Name of publisher, distributor, etc.
 
 65,928 26.80 67,378 1 14 1.08 0.00
$c Date of publication, distribution, etc.
 
 149,722 60.87 149,851 1 9 1.00 0.00
$e Place of manufacture
 
 24 0.01 24 1 4 1.00 0.00
$f Manufacturer
 
 22 0.01 22 1 4 1.00 0.00
$g Date of manufacture
 
 25 0.01 25 1 2 1.00 0.00
$t
 
 1 0.00 1 1 1 1.00 0.00
263 — Projected Publication Date
$a Projected publication date
 
 103 0.04 103 1 2 1.00 0.00
264 — Production, Publication, Distribution, Manufacture, and Copyright Notice
$6 Linkage
 
 93 0.04 98 1 3 1.01 0.00
$a Place of production, publication, distribution, manufacture
 
 74,139 30.14 74,964 1 10 1.04 0.00
$b Name of producer, publisher, distributor, manufacturer
 
 66,569 27.06 70,674 1 10 1.03 0.00
$c Date of production, publication, distribution, manufacture, or copyright notice
 
 92,213 37.49 93,062 1 8 1.03 0.00
3XX: Physical Description
300 — Physical Description
$6 Linkage
 
 1 0.00 1 1 1 1.00 0.00
$a Extent
 
 108,223 43.99 115,454 1 9 1.00 0.00
$b Other physical details
 
 54,759 22.26 54,760 1 5 1.00 0.00
$c Dimensions
 
 110,309 44.84 110,320 1 8 1.00 0.00
$e Accompanying material
 
 1,224 0.50 1,225 1 3 1.00 0.00
$f Type of unit
 
 24 0.01 24 1 5 1.12 0.06
310 — Current Publication Frequency
$a Current publication frequency
 
 2,781 1.13 2,781 1 3 1.00 0.00
$b Date of current publication frequency
 
 11 0.00 11 1 3 1.00 0.00
321 — Former Publication Frequency
$a Former publication frequency
 
 7 0.00 7 1 9 1.36 0.00
$b Dates of former publication frequency
 
 6 0.00 6 1 8 1.44 0.00
336 — Content Type
$2 Source
 
 245,010 99.60 246,731 1 8 1.03 0.00
$a Content type term
 
 245,056 99.62 246,787 1 8 1.03 0.00
$b Content type code
 
 5,907 2.40 5,933 1 5 1.09 0.00
337 — Media Type
$2 Source
 
 245,051 99.62 245,098 1 8 1.00 0.00
$a Media type term
 
 245,056 99.62 245,104 1 8 1.00 0.00
$b Media type code
 
 2,686 1.09 2,686 1 4 1.00 0.00
338 — Carrier Type
$2 Source
 
 245,042 99.61 245,133 1 8 1.00 0.00
$a Carrier type term
 
 245,049 99.62 245,140 1 8 1.00 0.00
$b Carrier type code
 
 2,649 1.08 2,651 1 4 1.00 0.00
340 — Physical Medium
$2 Source
 
 18,852 7.66 18,872 1 5 1.00 0.00
$a Material base and configuration
 
 1 0.00 1 1 2 1.07 0.00
$m Book format
 
 18,853 7.66 18,873 1 5 1.00 0.00
342 — Geospatial Reference Data
$a Name
 
 27 0.01 40 1 2 1.48 0.03
$b Coordinate units or distance units
 
 2 0.00 2 1 1 1.00 0.00
$e Standard parallel or oblique line latitude
 
 1 0.00 1 1 1 1.00 0.00
$g Longitude of central meridian or projection center
 
 1 0.00 1 1 1 1.00 0.00
$h Latitude of projection center or projection origin
 
 1 0.00 1 1 1 1.00 0.00
$i False easting
 
 3 0.00 3 1 1 1.00 0.00
$j False northing
 
 3 0.00 3 1 1 1.00 0.00
$k Scale factor
 
 1 0.00 1 1 1 1.00 0.00
$p Zone identifier
 
 1 0.00 1 1 1 1.00 0.00
$q Ellipsoid name
 
 3 0.00 3 1 1 1.00 0.00
$r Semi-major axis
 
 3 0.00 3 1 1 1.00 0.00
$s Denominator of flattening ratio
 
 2 0.00 2 1 1 1.00 0.00
343 — Planar Coordinate Data
$a Planar coordinate encoding method
 
 2 0.00 2 1 1 1.00 0.00
$b Planar distance units
 
 2 0.00 2 1 1 1.00 0.00
$c Abscissa resolution
 
 2 0.00 2 1 1 1.00 0.00
$d Ordinate resolution
 
 2 0.00 2 1 1 1.00 0.00
347 — Digital File Characteristics
$2 Source
 
 1 0.00 1 1 5 1.11 0.00
$a File type
 
 1 0.00 1 1 5 1.12 0.00
$b Encoding format
 
 1 0.00 1 1 3 1.04 0.00
352 — Digital Graphic Representation
$a Direct reference method
 
 17 0.01 17 1 1 1.00 0.00
$b Object type
 
 12 0.00 15 1 4 1.25 0.23
$c Object count
 
 1 0.00 4 4 4 4.00 0.00
362 — Dates of Publication and/or Sequential Designation
$a Dates of publication and/or sequential designation
 
 2,697 1.10 2,698 1 4 1.06 0.00
363 — Normalized Date and Sequential Designation
$a First level of enumeration
 
 4 0.00 4 1 1 1.00 0.00
366 — Trade Availability Information
$2 Source of availability status code
 
 305 0.12 305 1 2 1.00 0.00
$b Detailed date of publication
 
 304 0.12 304 1 2 1.00 0.00
$c Availability status code
 
 305 0.12 305 1 2 1.00 0.00
$d Expected next availability date
 
 6 0.00 6 1 1 1.00 0.00
$f Publisher's discount category
 
 179 0.07 179 1 2 1.00 0.00
$j ISO country code
 
 305 0.12 305 1 2 1.00 0.00
$k MARC country code
 
 305 0.12 305 1 2 1.00 0.00
$m Identification of agency
 
 262 0.11 262 1 2 1.00 0.00
380 — Form of Work
$2 Source of term
 
 66 0.03 66 1 8 1.13 0.00
$a Form of work
 
 66 0.03 66 1 8 1.15 0.00
4XX: Series Statement
490 — Series Statement
$3 Materials specified
 
 1 0.00 3 1 6 1.37 0.01
$6 Linkage
 
 18 0.01 18 1 4 1.03 0.00
$a Series statement
 
 13,737 5.58 14,289 1 10 1.05 0.00
$l Library of Congress call number
 
 4 0.00 4 1 2 1.02 0.01
$v Volume/sequential designation
 
 8,018 3.26 8,139 1 11 1.05 0.00
$x International Standard Serial Number
 
 76 0.03 77 1 8 1.04 0.00
5XX: Note
500 — General Note
$3 Materials specified
 
 1 0.00 1 1 5 1.88 0.16
$5 Institution to which field applies
 
 1,146 0.47 1,165 1 6 1.00 0.00
$6 Linkage
 
 31 0.01 47 1 7 1.15 0.00
$a General note
 
 73,998 30.08 190,178 1 94 1.38 0.00
$b
 
 2 0.00 2 1 1 1.00 0.00
$c
 
 1 0.00 1 1 1 1.00 0.00
501 — With Note
$5 Institution to which field applies
 
 7 0.00 7 1 4 1.04 0.01
$a With note
 
 120 0.05 121 1 8 1.02 0.00
502 — Dissertation Note
$a Dissertation note
 
 4 0.00 4 1 4 1.00 0.00
504 — Bibliography, etc. Note
$a Bibliography, etc. note
 
 3,829 1.56 3,860 1 8 1.00 0.00
505 — Formatted Contents Note
$6 Linkage
 
 9 0.00 9 1 13 1.02 0.00
$a Formatted contents note
 
 7,654 3.11 8,749 1 101 1.14 0.00
$g Miscellaneous information
 
 60 0.02 317 1 523 9.22 0.18
$r Statement of responsibility
 
 33 0.01 52 1 722 14.49 0.13
$t Title
 
 191 0.08 9,560 1 901 20.08 0.13
506 — Restrictions on Access Note
$a Terms governing access
 
 12 0.00 12 1 2 1.00 0.00
507 — Scale Note for Graphic Material
$a Representative fraction of scale note
 
 67 0.03 67 1 1 1.00 0.00
$b Remainder of scale note
 
 17 0.01 17 1 1 1.00 0.00
508 — Creation/Production Credits Note
$a Creation/production credits note
 
 4 0.00 4 1 5 1.03 0.00
510 — Citation/References Note
$a Name of source
 
 16,328 6.64 25,037 1 17 1.36 0.00
$b Coverage of source
 
 871 0.35 1,150 1 4 1.20 0.00
$c Location within source
 
 6,907 2.81 10,361 1 17 1.34 0.00
$u Uniform Resource Identifier
 
 2 0.00 2 1 1 1.00 0.00
511 — Participant or Performer Note
$a Participant or performer note
 
 4 0.00 4 1 4 1.20 0.00
514 — Data Quality Note
$a Attribute accuracy report
 
 2 0.00 2 1 1 1.00 0.00
$d Logical consistency report
 
 1 0.00 1 1 1 1.00 0.00
$e Completeness report
 
 1 0.00 1 1 1 1.00 0.00
$g Horizontal position accuracy value
 
 1 0.00 1 1 1 1.00 0.00
$h Horizontal position accuracy explanation
 
 1 0.00 1 1 1 1.00 0.00
515 — Numbering Peculiarities Note
$a Numbering peculiarities note
 
 949 0.39 1,660 1 7 1.15 0.00
516 — Type of Computer File or Data Note
$a Type of computer file or data note
 
 13 0.01 13 1 3 1.00 0.00
518 — Date/Time and Place of an Event Note
$a Date/time and place of an event note
 
 7 0.00 7 1 3 1.27 0.01
520 — Summary, etc.
$6 Linkage
 
 1 0.00 1 1 1 1.00 0.00
$a Summary, etc.
 
 2,254 0.92 2,285 1 24 1.05 0.00
521 — Target Audience Note
$a Target audience note
 
 13 0.01 16 1 6 1.22 0.00
522 — Geographic Coverage Note
$a Geographic coverage note
 
 967 0.39 967 1 2 1.00 0.00
525 — Supplement Note
$a Supplement note
 
 7 0.00 7 1 8 1.04 0.00
530 — Additional Physical Form available Note
$6 Linkage
 
 1 0.00 1 1 2 1.60 0.07
$a Additional physical form available note
 
 6,937 2.82 6,971 1 5 1.01 0.00
$b Availability source
 
 6,141 2.50 6,141 1 1 1.00 0.00
$c Availability conditions
 
 6,140 2.50 6,140 1 1 1.00 0.00
$d Order number
 
 6,139 2.50 6,139 1 1 1.00 0.00
533 — Reproduction Note
$a Type of reproduction
 
 2 0.00 2 1 3 1.01 0.00
534 — Original Version Note
$a Main entry of original
 
 2 0.00 2 1 3 1.03 0.01
$c Publication, distribution, etc. of original
 
 18 0.01 19 1 3 1.03 0.00
$e Physical description, etc. of original
 
 2 0.00 2 1 2 1.02 0.02
$m Material specific details
 
 1 0.00 1 1 2 1.14 0.12
$n Note about original
 
 3,114 1.27 3,114 1 2 1.00 0.00
$p Introductory phrase
 
 3,133 1.27 3,134 1 3 1.01 0.00
$t Title statement of original
 
 3,117 1.27 3,117 1 3 1.00 0.00
535 — Location of Originals/Duplicates Note
$a Custodian
 
 2 0.00 2 1 3 1.04 0.03
536 — Funding Information Note
$a Text of note
 
 7 0.00 7 1 5 1.00 0.00
$b Contract number
 
 1 0.00 1 1 4 1.03 0.00
538 — System Details Note
$a System details note
 
 2,717 1.10 3,162 1 8 1.04 0.00
540 — Terms Governing Use and Reproduction Note
$5 Institution to which field applies
 
 6 0.00 6 1 10 1.00 0.00
$a Terms governing use and reproduction
 
 23 0.01 25 1 11 1.01 0.00
$b Jurisdiction
 
 12 0.00 12 1 9 1.17 0.00
$c Authorization
 
 6 0.00 6 1 10 1.00 0.00
$u Uniform Resource Identifier
 
 1 0.00 1 1 1 1.00 0.00
541 — Immediate Source of Acquisition Note
$3 Materials specified
 
 1 0.00 1 1 1 1.00 0.00
$5 Institution to which field applies
 
 3 0.00 3 1 1 1.00 0.00
$a Source of acquisition
 
 4 0.00 4 1 1 1.00 0.00
$c Method of acquisition
 
 4 0.00 4 1 1 1.00 0.00
$d Date of acquisition
 
 2 0.00 2 1 1 1.00 0.00
$e Accession number
 
 2 0.00 2 1 1 1.00 0.00
$f Owner
 
 1 0.00 1 1 1 1.00 0.00
545 — Biographical or Historical Data
$a Biographical or historical data
 
 3 0.00 3 1 3 1.06 0.01
546 — Language Note
$a Language note
 
 8,296 3.37 8,334 1 4 1.00 0.00
$b Information code or alphabet
 
 16 0.01 16 1 6 1.05 0.00
550 — Issuing Body Note
$a Issuing body note
 
 3 0.00 3 1 4 1.04 0.00
552 — Entity and Attribute Information Note
$a Entity type label
 
 1 0.00 1 1 1 1.00 0.00
555 — Cumulative Index/Finding Aids Note
$a Cumulative index/finding aids note
 
 3,252 1.32 3,284 1 5 1.03 0.00
$b Availability source
 
 17 0.01 17 1 1 1.00 0.00
561 — Ownership and Custodial History
$5 Institution to which field applies
 
 1,596 0.65 1,596 1 7 1.01 0.00
$a History
 
 1,655 0.67 1,655 1 7 1.02 0.00
562 — Copy and Version Identification Note
$5 Institution to which field applies
 
 6,875 2.79 6,881 1 4 1.00 0.00
$a Identifying markings
 
 7,750 3.15 7,760 1 4 1.02 0.00
$b Copy identification
 
 89 0.04 92 1 2 1.03 0.01
580 — Linking Entry Complexity Note
$a Linking entry complexity note
 
 11,741 4.77 12,083 1 178 1.09 0.00
581 — Publications About Described Materials Note
$a Publications about described materials note
 
 336 0.14 385 1 4 1.05 0.00
583 — Action Note
$2 Source of term
 
 6,302 2.56 6,302 1 1 1.00 0.00
$5 Institution to which field applies
 
 6,303 2.56 6,303 1 1 1.00 0.00
$a Action
 
 6,303 2.56 6,303 1 2 1.00 0.00
$b Action identification
 
 2 0.00 2 1 1 1.00 0.00
$c Time/date of action
 
 6,303 2.56 6,303 1 2 1.00 0.00
$h Jurisdiction
 
 6,303 2.56 6,303 1 1 1.00 0.00
$x Nonpublic note
 
 6,303 2.56 6,303 1 1 1.00 0.00
585 — Exhibitions Note
$3 Materials specified
 
 6 0.00 12 1 40 2.34 0.28
$5 Institution to which field applies
 
 356 0.14 416 1 40 1.22 0.02
$a Exhibitions note
 
 394 0.16 463 1 40 1.20 0.01
588 — Source of Description Note
$a Source of description note
 
 3,631 1.48 6,352 1 5 1.05 0.00
6XX: Subject Access
600 — Subject Added Entry - Personal Name
$0 Authority record control number or standard number
 
 13 0.01 14 1 16 1.22 0.00
$2 Source of heading or term
 
 13 0.01 14 1 14 1.30 0.00
$a Personal name
 
 176 0.07 201 1 44 1.30 0.00
$b Numeration
 
 25 0.01 26 1 10 1.16 0.00
$c Titles and other words associated with a name
 
 56 0.02 61 1 21 1.20 0.00
$d Dates associated with a name
 
 148 0.06 164 1 39 1.28 0.00
$e Relator term
 
 25 0.01 26 1 20 1.17 0.03
$q Fuller form of name
 
 9 0.00 11 1 32 1.15 0.00
$t Title of a work
 
 13 0.01 14 1 12 1.16 0.00
$v Form subdivision
 
 29 0.01 43 1 42 1.33 0.00
$x General subdivision
 
 31 0.01 33 1 34 1.35 0.00
$z Geographic subdivision
 
 5 0.00 7 1 22 1.59 0.00
610 — Subject Added Entry - Corporate Name
$0 Authority record control number or standard number
 
 40 0.02 45 1 12 1.18 0.00
$2 Source of heading or term
 
 41 0.02 46 1 14 1.19 0.00
$6 Linkage
 
 1 0.00 1 1 4 1.17 0.00
$a Corporate name or jurisdiction name as entry element
 
 710 0.29 786 1 24 1.20 0.00
$b Subordinate unit
 
 377 0.15 415 1 24 1.44 0.00
$k Form subheading
 
 1 0.00 1 1 6 1.11 0.01
$n Number of part/section/meeting
 
 1 0.00 1 1 6 1.08 0.00
$t Title of a work
 
 3 0.00 3 1 8 1.07 0.00
$v Form subdivision
 
 349 0.14 398 1 14 1.18 0.00
$x General subdivision
 
 185 0.08 194 1 22 1.33 0.00
$y Chronological subdivision
 
 5 0.00 6 1 9 1.24 0.00
$z Geographic subdivision
 
 17 0.01 19 1 12 1.41 0.00
611 — Subject Added Entry - Meeting Name
$0 Authority record control number or standard number
 
 70 0.03 72 1 8 1.13 0.00
$2 Source of heading or term
 
 70 0.03 72 1 8 1.13 0.00
$a Meeting name or jurisdiction name as entry element
 
 96 0.04 107 1 8 1.12 0.00
$c Location of meeting
 
 22 0.01 25 1 8 1.09 0.00
$d Date of meeting
 
 27 0.01 30 1 8 1.10 0.00
$n Number of part/section/meeting
 
 13 0.01 16 1 8 1.11 0.00
$v Form subdivision
 
 11 0.00 12 1 8 1.11 0.00
$x General subdivision
 
 1 0.00 2 1 10 1.14 0.01
630 — Subject Added Entry - Uniform Title
$0 Authority record control number or standard number
 
 2 0.00 2 1 11 1.15 0.00
$2 Source of heading or term
 
 2 0.00 2 1 12 1.26 0.00
$a Uniform title
 
 18 0.01 23 1 21 1.28 0.00
$d Date of treaty signing
 
 1 0.00 1 1 10 1.17 0.00
$k Form subheading
 
 1 0.00 1 1 7 1.23 0.00
$n Number of part/section of a work
 
 1 0.00 1 1 6 1.25 0.02
$v Form subdivision
 
 7 0.00 8 1 18 1.26 0.00
$x General subdivision
 
 6 0.00 9 1 36 1.39 0.00
648 — Subject Added Entry - Chronological Term
$2 Source of heading or term
 
 92 0.04 92 1 8 1.01 0.00
$a Chronological term
 
 95 0.04 106 1 14 1.01 0.00
650 — Subject Added Entry - Topical Term
$0 Authority record control number or standard number
 
 3,835 1.56 5,845 1 31 2.30 0.00
$2 Source of heading or term
 
 4,067 1.65 6,221 1 84 4.22 0.00
$6 Linkage
 
 3 0.00 4 1 8 1.78 0.00
$a Topical term or geographic name entry element
 
 23,060 9.37 41,366 1 151 2.44 0.00
$b Topical term following geographic name entry element
 
 46 0.02 48 1 4 1.07 0.01
$c Location of event
 
 2 0.00 2 1 5 1.08 0.01
$d Active dates
 
 3 0.00 3 1 5 1.11 0.01
$e Relator term
 
 22 0.01 22 1 4 1.13 0.03
$v Form subdivision
 
 20,170 8.20 35,820 1 35 1.90 0.00
$x General subdivision
 
 1,885 0.77 2,607 1 162 2.05 0.00
$y Chronological subdivision
 
 300 0.12 350 1 25 1.56 0.00
$z Geographic subdivision
 
 19,250 7.83 47,694 1 66 2.30 0.00
651 — Subject Added Entry - Geographic Name
$0 Authority record control number or standard number
 
 8,029 3.26 14,749 1 16 1.27 0.00
$2 Source of heading or term
 
 198,181 80.56 213,469 1 26 1.19 0.00
$6 Linkage
 
 15 0.01 23 1 8 1.25 0.00
$a Geographic name
 
 234,908 95.49 275,295 1 131 1.53 0.00
$b
 
 3 0.00 3 1 2 1.08 0.02
$e Relator term
 
 87 0.04 147 1 5 1.51 0.04
$v Form subdivision
 
 163,368 66.41 207,523 1 70 1.38 0.00
$x General subdivision
 
 52,865 21.49 59,894 1 38 1.74 0.00
$y Chronological subdivision
 
 190,548 77.46 199,190 1 20 1.31 0.00
$z Geographic subdivision
 
 4,020 1.63 5,882 1 24 1.78 0.00
653 — Index Term - Uncontrolled
$a Uncontrolled term
 
 131 0.05 294 1 60 2.73 0.00
$x
 
 12 0.00 13 1 4 1.19 0.06
655 — Index Term - Genre/Form
$0 Authority record control number
 
 5,374 2.18 7,293 1 11 1.36 0.00
$2 Source of term
 
 31,609 12.85 42,079 1 24 1.38 0.00
$a Genre/form data or focus term
 
 32,277 13.12 42,929 1 29 1.47 0.00
$v Form subdivision
 
 2 0.00 2 1 7 1.01 0.00
$y Chronological subdivision
 
 46 0.02 75 1 11 2.16 0.00
$z Geographic subdivision
 
 45 0.02 128 1 20 2.70 0.00
656 — Index Term - Occupation
$0 Authority record control number
 
 5 0.00 5 1 1 1.00 0.00
$2 Source of term
 
 6 0.00 6 1 1 1.00 0.00
$a Occupation
 
 6 0.00 6 1 1 1.00 0.00
662 — Subject Added Entry - Hierarchical Place Name
$2 Source of heading or term
 
 3 0.00 3 1 32 1.70 0.02
$a Country or larger entity
 
 3 0.00 3 1 32 1.71 0.02
$b First-order political jurisdiction
 
 1 0.00 1 1 5 1.74 0.05
$c Intermediate political jurisdiction
 
 1 0.00 1 1 1 1.00 0.00
70X-75X: Added Entry
700 — Added Entry - Personal Name
$0 Authority record control number or standard number
 
 118 0.05 321 1 11 2.34 0.00
$4 Relationship
 
 15 0.01 27 1 17 2.42 0.01
$5 Institution to which field applies
 
 12,712 5.17 25,954 1 12 2.13 0.00
$6 Linkage
 
 18 0.01 28 1 24 1.43 0.00
$a Personal name
 
 40,828 16.60 74,604 1 421 1.48 0.00
$b Numeration
 
 12,715 5.17 25,728 1 8 1.78 0.00
$c Titles and other words associated with a name
 
 14,256 5.80 28,310 1 85 1.20 0.00
$d Dates associated with a name
 
 19,898 8.09 42,639 1 414 1.24 0.00
$e Relator term
 
 15,477 6.29 40,742 1 660 1.74 0.00
$f Date of a work
 
 2 0.00 2 1 6 1.23 0.00
$i Relationship information
 
 1 0.00 1 1 74 2.29 0.04
$p Name of part/section of a work
 
 2 0.00 2 1 59 3.28 0.04
$q Fuller form of name
 
 2,495 1.01 2,661 1 36 1.11 0.00
$t Title of a work
 
 120 0.05 131 1 180 1.33 0.00
710 — Added Entry - Corporate Name
$0 Authority record control number or standard number
 
 19 0.01 25 1 13 1.31 0.01
$4 Relationship
 
 12 0.00 12 1 4 1.08 0.00
$5 Institution to which field applies
 
 1 0.00 1 1 4 1.03 0.00
$6 Linkage
 
 29 0.01 31 1 8 1.19 0.00
$a Corporate name or jurisdiction name as entry element
 
 20,629 8.39 23,852 1 23 1.17 0.00
$b Subordinate unit
 
 13,520 5.50 34,389 1 24 1.26 0.00
$c Location of meeting
 
 1 0.00 1 1 5 1.04 0.00
$d Date of meeting or treaty signing
 
 12 0.00 12 1 12 1.05 0.00
$e Relator term
 
 1,925 0.78 2,250 1 13 1.08 0.00
$i Relationship information
 
 2 0.00 2 1 7 1.27 0.13
$k Form subheading
 
 1 0.00 1 1 10 1.14 0.01
$l Language of a work
 
 1 0.00 1 1 6 1.32 0.02
$n Number of part/section/meeting
 
 1 0.00 1 1 10 1.06 0.00
$t Title of a work
 
 23 0.01 29 1 12 1.09 0.00
711 — Added Entry - Meeting Name
$a Meeting name or jurisdiction name as entry element
 
 12 0.00 13 1 13 1.11 0.00
$c Location of meeting
 
 6 0.00 7 1 13 1.12 0.00
$d Date of meeting
 
 7 0.00 8 1 13 1.12 0.00
$e Subordinate unit
 
 1 0.00 1 1 11 1.10 0.01
$n Number of part/section/meeting
 
 4 0.00 5 1 12 1.11 0.00
720 — Added Entry - Uncontrolled Name
$4 Relationship
 
 2 0.00 2 1 5 1.66 0.03
$a Name
 
 284 0.12 318 1 43 1.10 0.00
$c
 
 1 0.00 1 1 4 1.03 0.00
$d
 
 3 0.00 3 1 4 1.02 0.00
$e Relator term
 
 3 0.00 3 1 43 1.00 0.00
730 — Added Entry - Uniform Title
$6 Linkage
 
 1 0.00 1 1 5 1.19 0.01
$a Uniform title
 
 73 0.03 76 1 39 1.12 0.00
$k Form subheading
 
 1 0.00 1 1 6 1.11 0.00
$p Name of part/section of a work
 
 1 0.00 1 1 8 1.22 0.00
$x International Standard Serial Number
 
 9 0.00 9 1 10 1.17 0.00
740 — Added Entry - Uncontrolled Related/Analytical Title
$6 Linkage
 
 3 0.00 4 1 21 1.54 0.01
$a Uncontrolled related/analytical title
 
 652 0.27 823 1 187 1.25 0.00
$n Number of part/section of a work
 
 2 0.00 2 1 16 1.61 0.08
$p Name of part/section of a work
 
 3 0.00 4 1 16 1.88 0.08
751 — Added Entry - Geographic Name
$a Geographic name
 
 1 0.00 1 1 3 1.03 0.00
752 — Added Entry - Hierarchical Place Name
$a Country or larger entity
 
 398 0.16 454 1 6 1.01 0.00
$b First-order political jurisdiction
 
 33 0.01 35 1 6 1.00 0.00
$c Intermediate political jurisdiction
 
 150 0.06 183 1 5 1.10 0.01
$d City
 
 152 0.06 177 1 6 1.01 0.00
$f City subsection
 
 2 0.00 2 1 2 1.00 0.00
$g Other nonjurisdictional geographic region and feature
 
 1 0.00 1 1 1 1.00 0.00
76X-78X: Linking Entry
760 — Main Series Entry
$a Main entry heading
 
 1 0.00 1 1 2 1.02 0.01
$d Place, publisher, and date of publication
 
 2 0.00 2 1 2 1.06 0.01
$g Related parts
 
 4 0.00 4 1 2 1.07 0.01
$i Relationship information
 
 1 0.00 1 1 2 1.25 0.20
$t Title
 
 7 0.00 7 1 4 1.04 0.00
$w Record control number
 
 6 0.00 6 1 3 1.09 0.02
$x International Standard Serial Number
 
 6 0.00 6 1 3 1.03 0.00
773 — Host Item Entry
$7 Control subfield
 
 1 0.00 1 1 1 1.00 0.00
$g Related parts
 
 3,114 1.27 3,114 1 3 1.00 0.00
$q Enumeration and first page
 
 1 0.00 1 1 2 1.00 0.00
$t Title
 
 3,114 1.27 3,114 1 3 1.00 0.00
$w Record control number
 
 3,117 1.27 3,117 1 2 1.01 0.00
775 — Other Edition Entry
$a Main entry heading
 
 1 0.00 1 1 5 1.07 0.00
$b Edition
 
 2 0.00 2 1 3 1.09 0.01
$d Place, publisher, and date of publication
 
 14,148 5.75 28,771 1 45 1.57 0.00
$i Relationship information
 
 1 0.00 1 1 6 1.12 0.00
$t Title
 
 14,583 5.93 29,324 1 46 1.58 0.00
$w Record control number
 
 14,582 5.93 29,323 1 46 1.59 0.00
776 — Additional Physical Form Entry
$a Main entry heading
 
 2,345 0.95 2,350 1 6 1.17 0.00
$b Edition
 
 9 0.00 9 1 3 1.06 0.00
$c Qualifying information
 
 1 0.00 1 1 4 1.04 0.00
$d Place, publisher, and date of publication
 
 15 0.01 16 1 6 1.04 0.00
$g Related parts
 
 2 0.00 2 1 6 1.38 0.05
$h Physical description
 
 344 0.14 347 1 6 1.19 0.00
$i Relationship information
 
 2,247 0.91 2,249 1 15 1.04 0.00
$q
 
 2 0.00 2 1 2 1.04 0.01
$s Uniform title
 
 2 0.00 2 1 3 1.08 0.00
$t Title
 
 2,491 1.01 2,497 1 15 1.11 0.00
$w Record control number
 
 13 0.01 14 1 8 1.05 0.00
$z International Standard Book Number
 
 32 0.01 32 1 5 1.01 0.00
777 — Issued With Entry
$6 Linkage
 
 1 0.00 4 1 4 2.50 1.06
$a Main entry heading
 
 4 0.00 4 1 3 1.19 0.01
$t Title
 
 7 0.00 10 1 10 1.15 0.02
780 — Preceding Entry
$a Main entry heading
 
 678 0.28 680 1 8 1.05 0.00
$b Edition
 
 3 0.00 3 1 6 1.07 0.00
$t Title
 
 677 0.28 679 1 17 1.08 0.00
785 — Succeeding Entry
$a Main entry heading
 
 673 0.27 682 1 13 1.10 0.00
$t Title
 
 672 0.27 681 1 15 1.14 0.00
787 — Other Relationship Entry
$a Main entry heading
 
 3 0.00 3 1 10 1.58 0.00
$b Edition
 
 1 0.00 1 1 4 1.11 0.02
$d Place, publisher, and date of publication
 
 30,899 12.56 31,028 1 19 1.02 0.00
$n Note
 
 24 0.01 24 1 22 1.01 0.00
$t Title
 
 31,160 12.67 31,302 1 22 1.03 0.00
$w Record control number
 
 31,622 12.85 32,106 1 178 1.11 0.00
$x International Standard Serial Number
 
 53 0.02 53 1 10 1.19 0.00
80X-83X: Series Added Entry
800 — Series Added Entry - Personal Name
$a Personal name
 
 4 0.00 4 1 5 1.01 0.00
$t Title of a work
 
 4 0.00 4 1 5 1.01 0.00
810 — Series Added Entry - Corporate Name
$6 Linkage
 
 1 0.00 1 1 1 1.00 0.00
$a Corporate name or jurisdiction name as entry element
 
 359 0.15 460 1 3 1.01 0.00
$b Subordinate unit
 
 81 0.03 110 1 6 1.83 0.00
$g Miscellaneous information
 
 5 0.00 5 1 1 1.00 0.00
$l Language of a work
 
 2 0.00 2 1 1 1.00 0.00
$p Name of part/section of a work
 
 154 0.06 154 1 2 1.01 0.00
$t Title of a work
 
 358 0.15 459 1 3 1.01 0.00
$v Volume/sequential designation
 
 273 0.11 274 1 3 1.01 0.00
830 — Series Added Entry - Uniform Title
$0 Authority record control number or standard number
 
 5 0.00 5 1 3 1.13 0.00
$6 Linkage
 
 12 0.00 12 1 6 1.05 0.00
$a Uniform title
 
 4,478 1.82 4,629 1 7 1.04 0.00
$f Date of a work
 
 11 0.00 11 1 2 1.01 0.00
$g Miscellaneous information
 
 1 0.00 1 1 2 1.03 0.02
$n Number of part/section of a work
 
 28 0.01 28 1 4 1.02 0.00
$p Name of part/section of a work
 
 38 0.02 41 1 6 1.05 0.00
$t Title of a work
 
 2 0.00 2 1 4 1.03 0.02
$v Volume/sequential designation
 
 3,234 1.31 3,276 1 7 1.03 0.00
$x International Standard Serial Number
 
 22 0.01 22 1 4 1.01 0.00
841-88X: Holdings, Location, Alternate Graphics
850 — Holding Institution
$a Holding institution
 
 1 0.00 2 1 47 1.43 0.07
852 — Location
$2 Source of classification or shelving scheme
 
 455 0.18 459 1 32 1.05 0.00
$3 Materials specified
 
 13,938 5.67 15,208 1 727 1.42 0.00
$a Location
 
 228,677 92.96 245,950 1 729 1.12 0.00
$b Sublocation or collection
 
 228,677 92.96 245,950 1 729 1.12 0.00
$c Shelving location
 
 316 0.13 318 1 727 1.03 0.00
$h Classification part
 
 564 0.23 570 1 32 1.06 0.00
$i Item part
 
 20 0.01 25 1 276 1.08 0.00
$j Shelving control number
 
 227,055 92.30 244,175 1 729 1.10 0.00
$k Call number prefix
 
 565 0.23 572 1 32 1.06 0.00
$l Shelving form of title
 
 1 0.00 1 1 1 1.00 0.00
$m Call number suffix
 
 253 0.10 256 1 32 1.12 0.00
$q Piece physical condition
 
 121 0.05 129 1 10 1.04 0.00
$t Copy number
 
 1 0.00 3 1 3 1.12 0.04
$x Nonpublic note
 
 5 0.00 5 1 33 1.10 0.00
$z Public note
 
 44 0.02 45 1 447 2.36 0.01
856 — Electronic Location and Access
$3 Materials specified
 
 8,774 3.57 9,330 1 25 1.18 0.00
$i Instruction
 
 1 0.00 1 1 2 1.51 0.00
$q Electronic format type
 
 3 0.00 3 1 7 1.22 0.00
$u Uniform Resource Identifier
 
 19,410 7.89 23,386 1 26 1.09 0.00
$v Hours access method available
 
 1 0.00 1 1 4 1.08 0.01
$x Nonpublic note
 
 1 0.00 1 1 12 1.00 0.00
$y Link text
 
 19,329 7.86 23,296 1 20 1.06 0.00
$z Public note
 
 2,492 1.01 2,532 1 22 1.16 0.00
880 — Alternate Graphic Representation
$2 Same as associated field
 
 4 0.00 7 1 12 1.85 0.00
$6 Linkage
 
 163 0.07 691 1 51 4.04 0.00
$a Same as associated field
 
 163 0.07 695 1 51 4.21 0.00
$b Same as associated field
 
 139 0.06 262 1 14 1.56 0.00
$c Same as associated field
 
 135 0.05 231 1 18 1.77 0.00
$d Same as associated field
 
 6 0.00 10 1 31 1.32 0.00
$e Same as associated field
 
 9 0.00 11 1 18 1.45 0.00
$g Same as associated field
 
 2 0.00 2 1 60 3.60 0.07
$h Same as associated field
 
 6 0.00 6 1 3 1.01 0.01
$i Same as associated field
 
 10 0.00 11 1 8 1.08 0.00
$n Same as associated field
 
 1 0.00 1 1 5 1.08 0.00
$p Same as associated field
 
 10 0.00 16 1 11 1.18 0.00
$t Same as associated field
 
 2 0.00 5 1 196 4.19 0.07
$v Same as associated field
 
 16 0.01 30 1 12 1.34 0.00
$x Same as associated field
 
 9 0.00 10 1 8 1.38 0.00
$z Same as associated field
 
 2 0.00 4 1 8 1.76 0.01
883 — Machine-generated Metadata Provenance
$a Generation process
 
 14 0.01 14 1 6 1.01 0.00
$c Confidence value
 
 14 0.01 14 1 2 1.00 0.00
$d Generation date
 
 14 0.01 14 1 6 1.01 0.00
$q Generation agency
 
 14 0.01 14 1 6 1.01 0.00
884 — Description Conversion Information
$a Conversion process
 
 3,798 1.54 3,798 1 2 1.00 0.00
$g Conversion date
 
 3,798 1.54 3,798 1 2 1.00 0.00
$q Conversion agency
 
 3,798 1.54 3,798 1 2 1.00 0.00
886 — Foreign MARC Information Field
$2 Source of data
 
 31,031 12.61 31,162 1 65 1.44 0.00
$a Tag of the foreign MARC field
 
 31,031 12.61 31,755 1 195 3.29 0.00
$b Content of the foreign MARC field
 
 31,031 12.61 61,715 1 65 1.47 0.00
$c
 
 40 0.02 55 1 65 2.04 0.00
$d
 
 4 0.00 5 1 26 1.88 0.00
$e
 
 6 0.00 6 1 43 1.27 0.00
$f
 
 10 0.00 10 1 53 1.17 0.00
$g
 
 9 0.00 9 1 29 1.00 0.00
$h
 
 32 0.01 53 1 52 1.35 0.00
$j
 
 3 0.00 3 1 12 1.07 0.00
$k
 
 24 0.01 33 1 26 1.23 0.00
$l
 
 2 0.00 2 1 16 2.09 0.03
$m
 
 2 0.00 2 1 3 1.08 0.02
$p
 
 4 0.00 4 1 59 1.43 0.00
$r
 
 1 0.00 1 1 12 1.07 0.04
$s
 
 3 0.00 3 1 10 1.53 0.01
$t
 
 2 0.00 2 1 29 1.76 0.00
$u
 
 1 0.00 1 1 5 1.06 0.00
$x
 
 33 0.01 88 1 141 1.96 0.00
$y
 
 26 0.01 26 1 6 1.11 0.09
$z
 
 30 0.01 64 1 68 2.07 0.00
887 — Non-MARC Information Field
$a Content of non-MARC field
 
 3,113 1.27 3,113 1 2 1.00 0.00
OCLCMARC tags
019 — OCLC Control Number Cross-Reference
$a OCLC control number of merged and deleted record
 
 159,149 64.70 159,571 1 65 1.37 0.00
029 — Other System Control Number
$a OCLC library identifier
 
 1 0.00 1 1 9 1.19 0.01
$b System control number
 
 1 0.00 1 1 9 1.19 0.01
090 — Locally Assigned LC-type Call Number
$a Classification number
 
 128 0.05 129 1 3 1.00 0.00
$b Local Cutter number
 
 54 0.02 54 1 6 1.01 0.00
994 — OCLC-MARC Transaction Code
$a Transaction code
 
 9 0.00 9 1 1 1.00 0.00
$b Institution symbol
 
 9 0.00 9 1 1 1.00 0.00
Locally defined tags of the British Library
039 — National Bibliography Issue Number
$a National bibliography issue number
 
 140 0.06 140 1 6 1.00 0.00
590 — Document Supply General Note
$a General note
 
 4 0.00 4 1 9 1.04 0.00
594 — Reference to Items in Printed Catalogues
$a Note of earliest British Library edition
 
 192 0.08 192 1 1 1.00 0.00
$b Reference to items in printed catalogues
 
 764 0.31 765 1 2 1.00 0.00
595 — Document Supply Bibliographic History Note
$a Bibliographic history note
 
 14 0.01 15 1 4 1.00 0.00
597 — Editing or Error Message
$a Unconverted legacy field or Message relating to conversion, deduplication and enhancement
 
 828 0.34 1,058 1 8 1.01 0.00
$b Information relating to record enhancement
 
 5 0.00 5 1 5 1.00 0.00
598 — Document Supply Selection / Ordering Information
$a Document Supply selection/ordering information
 
 1 0.00 1 1 2 1.00 0.00
690 — Collection Subset
$2 Source of term
 
 86 0.03 86 1 4 1.08 0.00
$a Collection subset
 
 125 0.05 125 1 4 1.08 0.00
859 — Digital Resource Flag
$a Digital resource flag
 
 11,389 4.63 11,389 1 3 1.03 0.00
$b Category of digital resource
 
 11,389 4.63 11,418 1 3 1.03 0.00
916 — Authority Control Information
$a Authority control information
 
 34 0.01 44 1 13 1.29 0.00
945 — BL Local Title
$a BL local title
 
 7 0.00 7 1 6 1.00 0.00
954 — Transliteration Statement
$a Transliteration statement
 
 27 0.01 27 1 2 1.00 0.00
955 — Shelving Location
$a Shelfmark
 
 18 0.01 18 1 13 1.07 0.00
$b Location
 
 2 0.00 2 1 2 1.01 0.00
957 — Acquisitions Data
$a Receipt date and method of acquisition code or Cataloguer initials
 
 25,137 10.22 25,467 1 9 1.01 0.00
$b Receipt date or Name of supplier (Asia, Pacific & Africa Collections)
 
 1 0.00 1 1 2 1.00 0.00
$r Receipt date
 
 371 0.15 373 1 16 1.01 0.00
$t Legal Deposit Office batch number
 
 12 0.00 12 1 16 1.01 0.00
960 — Normalised Place of Publication
$a Normalised place of publication
 
 18,790 7.64 18,809 1 2 1.00 0.00
961 — Sheet Index Note
$b Shelfmark
 
 2 0.00 2 1 1 1.00 0.00
966 — Document Supply Acquisitions Indicator
$l Acquisitions record indicator
 
 2 0.00 2 1 9 1.03 0.00
968 — Record Status Field
$a Record status
 
 3 0.00 3 1 2 1.00 0.00
$b Record status
 
 15 0.01 15 1 1 1.00 0.00
975 — Insufficient Record Statement
$a Indication of insufficient record
 
 786 0.32 786 1 3 1.00 0.00
$b Indication of insufficient record - Oriental Romanised records
 
 205 0.08 205 1 2 1.00 0.00
979 — Negative Shelfmark
$a Location
 
 1 0.00 1 1 2 1.00 0.00
$b Sublocation or collection
 
 6 0.00 6 1 2 1.00 0.00
985 — Cataloguer’s Note
$5
 
 8 0.00 8 1 1 1.00 0.00
$=
 
 1 0.00 1 1 1 1.00 0.00
$a Cataloguer’s Note
 
 134,484 54.67 168,516 1 9 1.56 0.00
$e
 
 1 0.00 1 1 2 1.00 0.00
997 — Shared Library Message Field
$a Legal Deposit Library’s message
 
 6 0.00 6 1 3 1.01 0.00
unknown origin
049
$j
 
 1 0.00 2 1 3 1.02 0.00
$k
 
 1 0.00 2 1 3 1.02 0.00
$l
 
 1 0.00 2 1 3 1.02 0.00
098
$a
 
 10 0.00 10 1 1 1.00 0.00
180
$a
 
 1 0.00 1 1 1 1.00 0.00
503
$5
 
 2 0.00 2 1 1 1.00 0.00
$a
 
 3 0.00 3 1 1 1.00 0.00
551
$2
 
 1 0.00 1 1 1 1.00 0.00
$a
 
 1 0.00 1 1 1 1.00 0.00
$v
 
 1 0.00 1 1 1 1.00 0.00
$x
 
 1 0.00 1 1 1 1.00 0.00
$y
 
 1 0.00 1 1 1 1.00 0.00
640
$a
 
 1 0.00 1 1 1 1.00 0.00
$v
 
 1 0.00 1 1 1 1.00 0.00
948
$h
 
 9 0.00 9 1 1 1.00 0.00
951
$0
 
 1 0.00 1 1 1 1.00 0.00
$2
 
 1 0.00 1 1 1 1.00 0.00
$a
 
 1 0.00 1 1 1 1.00 0.00
$z
 
 1 0.00 1 1 1 1.00 0.00
958
$a
 
 136,102 55.33 140,949 1 18 1.04 0.00
$c
 
 15 0.01 15 1 6 1.07 0.00
A02
$a
 
 1 0.00 1 1 5 1.00 0.00
$z
 
 1 0.00 1 1 3 1.00 0.00
ACF
$5
 
 4 0.00 7 1 63 6.39 0.00
$a
 
 4 0.00 7 1 63 6.39 0.00
$c
 
 4 0.00 7 1 63 6.39 0.00
$e
 
 4 0.00 7 1 63 6.39 0.00
$f
 
 4 0.00 7 1 63 6.36 0.00
$g
 
 4 0.00 7 1 63 6.36 0.00
$h
 
 4 0.00 7 1 63 6.39 0.00
AQN
$a
 
 27 0.01 28 1 6 1.00 0.00
BUF
$a
 
 3 0.00 3 1 2 1.00 0.00
$d
 
 3 0.00 3 1 2 1.00 0.00
CAT
$a
 
 245,990 100.00 1,174,326 1 38 6.38 0.00
$b
 
 245,945 99.98 993,173 1 35 5.05 0.00
$c
 
 245,990 100.00 1,177,457 1 38 6.46 0.00
$h
 
 245,990 100.00 1,177,457 1 38 6.46 0.00
$l
 
 245,990 100.00 1,177,457 1 38 6.46 0.00
CFI
$5
 
 6 0.00 8 1 21 1.69 0.00
$a
 
 6 0.00 8 1 21 1.69 0.00
$c
 
 6 0.00 8 1 21 1.69 0.00
$e
 
 6 0.00 8 1 20 1.69 0.00
$f
 
 5 0.00 7 1 20 1.69 0.00
$g
 
 5 0.00 7 1 20 1.69 0.00
$h
 
 6 0.00 8 1 21 1.69 0.00
$i
 
 1 0.00 1 1 20 1.30 0.00
DGM
$a
 
 192 0.08 192 1 2 1.00 0.00
$b
 
 192 0.08 192 1 2 1.00 0.00
DRT
$a
 
 192 0.08 192 1 3 1.00 0.00
E60
$a
 
 1 0.00 1 1 1 1.00 0.00
$c
 
 1 0.00 1 1 1 1.00 0.00
EXP
$a
 
 58 0.02 58 1 2 1.00 0.00
$d
 
 1 0.00 1 1 2 1.00 0.00
FFP
$a
 
 7,998 3.25 7,998 1 2 1.00 0.00
$b
 
 7,998 3.25 7,998 1 2 1.00 0.00
FIN
$a
 
 222,632 90.50 222,644 1 2 1.00 0.00
$d
 
 37,071 15.07 37,076 1 2 1.00 0.00
FMT
$a
 
 245,990 100.00 245,990 1 3 1.00 0.00
LAS
$a
 
 245,989 100.00 245,989 1 2 1.00 0.00
$b
 
 245,989 100.00 245,989 1 2 1.00 0.00
$c
 
 245,990 100.00 245,990 1 2 1.00 0.00
$h
 
 245,990 100.00 245,990 1 2 1.00 0.00
$l
 
 245,990 100.00 245,990 1 2 1.00 0.00
LCS
$a
 
 1 0.00 1 1 4 1.05 0.00
$v
 
 1 0.00 1 1 3 1.04 0.00
LDO
$a
 
 812 0.33 858 1 6 1.00 0.00
$b
 
 796 0.32 853 1 6 1.00 0.00
$c
 
 599 0.24 655 1 5 1.00 0.00
$d
 
 541 0.22 554 1 6 1.00 0.00
LEO
$a
 
 191,565 77.88 191,874 1 71 1.17 0.00
LKR
$a
 
 28,920 11.76 43,574 1 46 1.14 0.00
$b
 
 28,920 11.76 43,574 1 46 1.14 0.00
$l
 
 13,677 5.56 13,980 1 19 1.02 0.00
$m
 
 28,920 11.76 43,574 1 46 1.14 0.00
$n
 
 28,920 11.76 43,574 1 46 1.14 0.00
$p
 
 25 0.01 25 1 7 1.02 0.00
$r
 
 27,578 11.21 42,231 1 46 1.14 0.00
$v
 
 1 0.00 1 1 17 1.03 0.00
MPX
$a
 
 18,396 7.48 18,396 1 1 1.00 0.00
NEG
$a
 
 4 0.00 4 1 1 1.00 0.00
OHC
$a
 
 192 0.08 192 1 1 1.00 0.00
OSS
$a
 
 1 0.00 1 1 1 1.00 0.00
SID
$a
 
 2,343 0.95 2,347 1 4 1.01 0.00
$b
 
 2,344 0.95 2,348 1 4 1.01 0.00
$c
 
 369 0.15 370 1 2 1.00 0.00
SRC
$`
 
 1 0.00 1 1 1 1.00 0.00
$a
 
 205,814 83.67 206,030 1 131 1.16 0.00
$b
 
 193,550 78.68 193,753 1 131 1.17 0.00
SSD
$a
 
 2 0.00 2 1 2 1.00 0.00
TCO
$a
 
 8 0.00 8 1 2 1.00 0.00
$b
 
 6 0.00 6 1 2 1.00 0.00
$c
 
 8 0.00 8 1 2 1.00 0.00
U60
$a
 
 1 0.00 1 1 1 1.00 0.00
$b
 
 1 0.00 1 1 1 1.00 0.00
$c
 
 1 0.00 1 1 1 1.00 0.00
USS
$E
 
 1 0.00 1 1 1 1.00 0.00