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: 5,930

field groups

tags label count %

Fields defined in MARC21
01X-09X Numbers and Code
 
 5,929 99.98
1XX Main Entry
 
 3,097 52.23
20X-24X Title
 
 5,930 100.00
25X-28X Edition, Imprint
 
 5,922 99.87
3XX Physical Description
 
 5,930 100.00
4XX Series Statement
 
 1,183 19.95
5XX Note
 
 5,620 94.77
6XX Subject Access
 
 1,803 30.40
70X-75X Added Entry
 
 2,835 47.81
76X-78X Linking Entry
 
 52 0.88
80X-83X Series Added Entry
 
 812 13.69
841-88X Holdings, Location, Alternate Graphics
 
 2,089 35.23

Fields defined in extensions of MARC
OCLC OCLCMARC tags
 
 4 0.07
BL Locally defined tags of the British Library
 
 5,930 100.00
unknown unknown origin
 
 5,930 100.00

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
 
 42 0.71 42 1 8 1.00 0.00
$z Canceled/invalid LC control number
 
 1 0.02 2 1 15 1.15 0.00
015 — National Bibliography Number
$2 Source
 
 594 10.02 594 1 5 1.00 0.00
$a National bibliography number
 
 594 10.02 594 1 6 1.00 0.00
016 — National Bibliographic Agency Control Number
$2 Source
 
 3 0.05 3 1 6 1.00 0.00
$a Record control number
 
 16 0.27 16 1 7 1.00 0.00
020 — International Standard Book Number
$1
 
 1 0.02 2 1 2 1.49 0.01
$a International Standard Book Number
 
 4,433 74.76 8,482 1 158 1.38 0.00
$c Terms of availability
 
 3,727 62.85 7,438 1 144 1.42 0.00
$q Qualifying information
 
 14 0.24 23 1 335 2.22 0.00
$z Canceled/invalid ISBN
 
 218 3.68 225 1 219 1.45 0.00
022 — International Standard Serial Number
$a International Standard Serial Number
 
 6 0.10 6 1 4 1.00 0.00
$z Canceled ISSN
 
 1 0.02 1 1 4 1.05 0.00
024 — Other Standard Identifier
$2 Source of number or code
 
 251 4.23 258 1 4 1.04 0.00
$a Standard number or code
 
 254 4.28 261 1 62 1.11 0.00
034 — Coded Cartographic Mathematical Data
$a Category of scale
 
 7 0.12 7 1 8 1.01 0.00
$b Constant ratio linear horizontal scale
 
 3 0.05 3 1 9 1.04 0.00
$d Coordinates - westernmost longitude
 
 4 0.07 4 1 8 1.02 0.00
$e Coordinates - easternmost longitude
 
 4 0.07 4 1 8 1.02 0.00
$f Coordinates - northernmost latitude
 
 4 0.07 4 1 8 1.02 0.00
$g Coordinates - southernmost latitude
 
 4 0.07 4 1 8 1.02 0.00
035 — System Control Number
$a System control number
 
 1,154 19.46 1,154 1 14 1.11 0.00
$z Canceled/invalid control number
 
 1 0.02 2 1 56 1.45 0.00
037 — Source of Acquisition
$a Stock number
 
 42 0.71 44 1 17 1.01 0.00
$b Source of stock number/acquisition
 
 45 0.76 46 1 17 1.01 0.00
$c Terms of availability
 
 3 0.05 3 1 8 1.01 0.00
$f Form of issue
 
 5 0.08 5 1 17 1.02 0.00
040 — Cataloging Source
$a Original cataloging agency
 
 5,922 99.87 5,922 1 4 1.00 0.00
$b Language of cataloging
 
 5,893 99.38 5,893 1 3 1.00 0.00
$c Transcribing agency
 
 5,908 99.63 5,908 1 3 1.00 0.00
$d Modifying agency
 
 1,421 23.96 3,528 1 99 1.97 0.00
$e Description conventions
 
 1,283 21.64 1,290 1 4 1.19 0.00
041 — Language Code
$a Language code of text/sound track or separate title
 
 58 0.98 98 1 25 1.37 0.00
$b Language code of summary or abstract
 
 4 0.07 4 1 21 1.24 0.00
$f Language code of table of contents
 
 1 0.02 1 1 23 1.19 0.01
$g Language code of accompanying material other than librettos
 
 1 0.02 2 1 7 1.62 0.00
$h Language code of original
 
 10 0.17 10 1 11 1.02 0.00
$j Language code of subtitles or captions
 
 2 0.03 2 1 7 1.26 0.03
042 — Authentication Code
$a Authentication code
 
 908 15.31 908 1 5 1.01 0.00
043 — Geographic Area Code
$a Geographic area code
 
 274 4.62 295 1 11 1.15 0.00
045 — Time Period of Content
$a Time period code
 
 1 0.02 1 1 7 1.42 0.00
050 — Library of Congress Call Number
$a Classification number
 
 71 1.20 72 1 8 1.02 0.00
$b Item number
 
 43 0.73 43 1 4 1.01 0.00
052 — Geographic Classification
$a Geographic classification area code
 
 7 0.12 7 1 10 1.04 0.00
$b Geographic classification subarea code
 
 3 0.05 3 1 11 1.68 0.00
060 — National Library of Medicine Call Number
$a Classification number
 
 2 0.03 3 1 4 1.27 0.00
$b Item number
 
 1 0.02 1 1 2 1.05 0.00
066 — Character Sets Present
$c Alternate G0 or G1 character set
 
 1 0.02 1 1 3 1.09 0.00
070 — National Agricultural Library Call Number
$a Classification number
 
 30 0.51 30 1 3 1.00 0.00
$b Item number
 
 30 0.51 30 1 2 1.00 0.00
072 — Subject Category Code
$a Subject category code
 
 26 0.44 39 1 53 1.85 0.00
074 — GPO Item Number
$a GPO item number
 
 718 12.11 864 1 10 1.33 0.00
082 — Dewey Decimal Classification Number
$2 Edition number
 
 2,629 44.33 2,630 1 10 1.12 0.00
$a Classification number
 
 2,675 45.11 2,677 1 10 1.12 0.00
$q Assigning agency
 
 30 0.51 30 1 1 1.00 0.00
086 — Government Document Classification Number
$a Classification number
 
 719 12.12 736 1 28 1.01 0.00
$z Canceled/invalid classification number
 
 41 0.69 42 1 14 1.10 0.00
088 — Report Number
$a Report number
 
 45 0.76 51 1 28 1.07 0.00
1XX: Main Entry
100 — Main Entry - Personal Name
$6 Linkage
 
 3 0.05 3 1 2 1.00 0.00
$a Personal name
 
 2,437 41.10 2,437 1 7 1.00 0.00
$c Titles and words associated with a name
 
 99 1.67 99 1 3 1.02 0.00
$d Dates associated with a name
 
 370 6.24 370 1 2 1.00 0.00
$e Relator term
 
 322 5.43 322 1 4 1.02 0.00
$q Fuller form of name
 
 39 0.66 39 1 2 1.00 0.00
110 — Main Entry - Corporate Name
$a Corporate name or jurisdiction name as entry element
 
 619 10.44 619 1 2 1.00 0.00
$b Subordinate unit
 
 59 0.99 72 1 6 1.41 0.00
$e Relator term
 
 2 0.03 2 1 3 1.05 0.00
111 — Main Entry - Meeting Name
$a Meeting name or jurisdiction name as entry element
 
 3 0.05 3 1 1 1.00 0.00
$c Location of meeting
 
 3 0.05 3 1 5 1.00 0.00
$d Date of meeting
 
 3 0.05 3 1 2 1.00 0.00
$n Number of part/section/meeting
 
 1 0.02 1 1 2 1.00 0.00
130 — Main Entry - Uniform Title
$6 Linkage
 
 1 0.02 1 1 1 1.00 0.00
$a Uniform title
 
 38 0.64 38 1 1 1.00 0.00
$h Medium
 
 1 0.02 1 1 1 1.00 0.00
$l Language of a work
 
 2 0.03 2 1 1 1.00 0.00
$p Name of part/section of a work
 
 10 0.17 10 1 4 1.18 0.00
20X-24X: Title
240 — Uniform Title
$a Uniform title
 
 8 0.13 8 1 4 1.00 0.00
$m Medium of performance for music
 
 1 0.02 1 1 2 1.00 0.00
$n Number of part/section of a work
 
 1 0.02 1 1 4 1.08 0.00
$r Key for music
 
 1 0.02 1 1 1 1.00 0.00
245 — Title Statement
$6 Linkage
 
 30 0.51 30 1 2 1.00 0.00
$a Title
 
 5,930 100.00 5,930 1 6 1.00 0.00
$b Remainder of title
 
 1,514 25.53 1,514 1 4 1.00 0.00
$c Statement of responsibility, etc.
 
 3,335 56.24 3,335 1 2 1.00 0.00
$h Medium
 
 4,623 77.96 4,623 1 2 1.00 0.00
$n Number of part/section of a work
 
 722 12.18 724 1 9 1.03 0.00
$p Name of part/section of a work
 
 1,036 17.47 1,105 1 29 1.06 0.00
246 — Varying Form of Title
$6 Linkage
 
 10 0.17 14 1 14 1.17 0.00
$a Title proper/short title
 
 559 9.43 812 1 41 1.24 0.00
$b Remainder of title
 
 43 0.73 54 1 11 1.09 0.00
$f Date or sequential designation
 
 3 0.05 4 1 9 1.30 0.00
$i Display text
 
 119 2.01 132 1 26 1.11 0.00
$n Number of part/section of a work
 
 3 0.05 3 1 7 1.19 0.00
$p Name of part/section of a work
 
 28 0.47 29 1 14 1.39 0.00
247 — Former Title
$a Title
 
 6 0.10 6 1 8 1.27 0.02
$f Date or sequential designation
 
 5 0.08 5 1 6 1.29 0.01
25X-28X: Edition, Imprint
250 — Edition Statement
$6 Linkage
 
 2 0.03 2 1 6 1.00 0.00
$a Edition statement
 
 1,157 19.51 1,157 1 6 1.00 0.00
255 — Cartographic Mathematical Data
$a Statement of scale
 
 21 0.35 21 1 8 1.01 0.00
$c Statement of coordinates
 
 3 0.05 3 1 8 1.02 0.00
$e Statement of equinox
 
 1 0.02 1 1 1 1.00 0.00
256 — Computer File Characteristics
$a Computer file characteristics
 
 115 1.94 115 1 1 1.00 0.00
260 — Publication, Distribution, etc. (Imprint)
$6 Linkage
 
 8 0.13 8 1 6 1.00 0.00
$a Place of publication, distribution, etc.
 
 4,134 69.71 4,196 1 20 1.10 0.00
$b Name of publisher, distributor, etc.
 
 4,639 78.23 8,371 1 14 1.08 0.00
$c Date of publication, distribution, etc.
 
 4,641 78.26 4,641 1 9 1.00 0.00
$g Date of manufacture
 
 1 0.02 1 1 2 1.00 0.00
264 — Production, Publication, Distribution, Manufacture, and Copyright Notice
$6 Linkage
 
 8 0.13 8 1 3 1.01 0.00
$a Place of production, publication, distribution, manufacture
 
 1,264 21.32 1,350 1 10 1.04 0.00
$b Name of producer, publisher, distributor, manufacturer
 
 1,266 21.35 1,361 1 10 1.03 0.00
$c Date of production, publication, distribution, manufacture, or copyright notice
 
 1,128 19.02 1,130 1 8 1.03 0.00
3XX: Physical Description
300 — Physical Description
$a Extent
 
 2,913 49.12 2,915 1 9 1.00 0.00
$b Other physical details
 
 852 14.37 852 1 5 1.00 0.00
$c Dimensions
 
 721 12.16 722 1 8 1.00 0.00
$e Accompanying material
 
 68 1.15 68 1 3 1.00 0.00
310 — Current Publication Frequency
$a Current publication frequency
 
 21 0.35 21 1 3 1.00 0.00
336 — Content Type
$2 Source
 
 4,895 82.55 6,174 1 8 1.03 0.00
$a Content type term
 
 4,895 82.55 6,174 1 8 1.03 0.00
$b Content type code
 
 9 0.15 9 1 5 1.09 0.00
337 — Media Type
$2 Source
 
 5,605 94.52 5,635 1 8 1.00 0.00
$a Media type term
 
 5,605 94.52 5,635 1 8 1.00 0.00
$b Media type code
 
 3 0.05 3 1 4 1.00 0.00
338 — Carrier Type
$2 Source
 
 5,373 90.61 5,403 1 8 1.00 0.00
$a Carrier type term
 
 5,373 90.61 5,403 1 8 1.00 0.00
$b Carrier type code
 
 3 0.05 3 1 4 1.00 0.00
340 — Physical Medium
$2 Source
 
 1 0.02 1 1 5 1.00 0.00
$m Book format
 
 1 0.02 1 1 5 1.00 0.00
347 — Digital File Characteristics
$2 Source
 
 3 0.05 3 1 5 1.11 0.00
$a File type
 
 2 0.03 2 1 5 1.12 0.00
$b Encoding format
 
 3 0.05 3 1 3 1.04 0.00
362 — Dates of Publication and/or Sequential Designation
$a Dates of publication and/or sequential designation
 
 13 0.22 13 1 4 1.06 0.00
366 — Trade Availability Information
$2 Source of availability status code
 
 3,826 64.52 3,826 1 2 1.00 0.00
$b Detailed date of publication
 
 3,826 64.52 3,826 1 2 1.00 0.00
$c Availability status code
 
 3,826 64.52 3,826 1 2 1.00 0.00
$d Expected next availability date
 
 46 0.78 46 1 1 1.00 0.00
$f Publisher's discount category
 
 953 16.07 953 1 2 1.00 0.00
$g Date made out of print
 
 131 2.21 131 1 1 1.00 0.00
$j ISO country code
 
 3,826 64.52 3,826 1 2 1.00 0.00
$k MARC country code
 
 3,826 64.52 3,826 1 2 1.00 0.00
$m Identification of agency
 
 3,678 62.02 3,678 1 2 1.00 0.00
4XX: Series Statement
490 — Series Statement
$1
 
 3 0.05 3 1 2 1.11 0.01
$6 Linkage
 
 3 0.05 4 1 4 1.03 0.00
$a Series statement
 
 1,182 19.93 1,234 1 10 1.05 0.00
$v Volume/sequential designation
 
 335 5.65 343 1 11 1.05 0.00
$x International Standard Serial Number
 
 83 1.40 83 1 8 1.04 0.00
5XX: Note
500 — General Note
$5 Institution to which field applies
 
 5 0.08 5 1 6 1.00 0.00
$a General note
 
 5,287 89.16 6,938 1 94 1.38 0.00
501 — With Note
$a With note
 
 1 0.02 1 1 8 1.02 0.00
502 — Dissertation Note
$a Dissertation note
 
 1 0.02 1 1 4 1.00 0.00
504 — Bibliography, etc. Note
$a Bibliography, etc. note
 
 130 2.19 130 1 8 1.00 0.00
505 — Formatted Contents Note
$6 Linkage
 
 1 0.02 1 1 13 1.02 0.00
$a Formatted contents note
 
 95 1.60 97 1 101 1.14 0.00
$t Title
 
 2 0.03 5 1 901 20.08 0.13
506 — Restrictions on Access Note
$a Terms governing access
 
 235 3.96 235 1 2 1.00 0.00
508 — Creation/Production Credits Note
$a Creation/production credits note
 
 2 0.03 2 1 5 1.03 0.00
510 — Citation/References Note
$u Uniform Resource Identifier
 
 36 0.61 36 1 1 1.00 0.00
511 — Participant or Performer Note
$a Participant or performer note
 
 5 0.08 5 1 4 1.20 0.00
513 — Type of Report and Period Covered Note
$a Type of report
 
 1 0.02 1 1 7 1.01 0.00
$b Period covered
 
 1 0.02 1 1 6 1.00 0.00
515 — Numbering Peculiarities Note
$a Numbering peculiarities note
 
 2 0.03 3 1 7 1.15 0.00
516 — Type of Computer File or Data Note
$a Type of computer file or data note
 
 220 3.71 227 1 3 1.00 0.00
518 — Date/Time and Place of an Event Note
$a Date/time and place of an event note
 
 9 0.15 9 1 3 1.27 0.01
$d Date of event
 
 19 0.32 19 1 3 1.10 0.05
520 — Summary, etc.
$a Summary, etc.
 
 573 9.66 583 1 24 1.05 0.00
521 — Target Audience Note
$a Target audience note
 
 2 0.03 2 1 6 1.22 0.00
522 — Geographic Coverage Note
$a Geographic coverage note
 
 34 0.57 34 1 2 1.00 0.00
530 — Additional Physical Form available Note
$a Additional physical form available note
 
 146 2.46 152 1 5 1.01 0.00
534 — Original Version Note
$c Publication, distribution, etc. of original
 
 1 0.02 1 1 3 1.03 0.00
$f Series statement of original
 
 1 0.02 1 1 2 1.06 0.03
$p Introductory phrase
 
 1 0.02 1 1 3 1.01 0.00
$t Title statement of original
 
 1 0.02 1 1 3 1.00 0.00
536 — Funding Information Note
$a Text of note
 
 4 0.07 4 1 5 1.00 0.00
$b Contract number
 
 3 0.05 3 1 4 1.03 0.00
538 — System Details Note
$a System details note
 
 1,307 22.04 1,880 1 8 1.04 0.00
540 — Terms Governing Use and Reproduction Note
$3 Materials specified
 
 6 0.10 7 1 8 1.13 0.00
$a Terms governing use and reproduction
 
 338 5.70 344 1 11 1.01 0.00
$b Jurisdiction
 
 94 1.59 99 1 9 1.17 0.00
546 — Language Note
$a Language note
 
 39 0.66 39 1 4 1.00 0.00
$b Information code or alphabet
 
 1 0.02 1 1 6 1.05 0.00
550 — Issuing Body Note
$a Issuing body note
 
 5 0.08 5 1 4 1.04 0.00
580 — Linking Entry Complexity Note
$a Linking entry complexity note
 
 5 0.08 5 1 178 1.09 0.00
584 — Accumulation and Frequency of Use Note
$a Accumulation
 
 234 3.95 315 1 2 1.54 0.00
588 — Source of Description Note
$a Source of description note
 
 237 4.00 238 1 5 1.05 0.00
6XX: Subject Access
600 — Subject Added Entry - Personal Name
$a Personal name
 
 34 0.57 48 1 44 1.30 0.00
$b Numeration
 
 4 0.07 4 1 10 1.16 0.00
$c Titles and other words associated with a name
 
 7 0.12 8 1 21 1.20 0.00
$d Dates associated with a name
 
 29 0.49 38 1 39 1.28 0.00
$e Relator term
 
 1 0.02 1 1 20 1.17 0.03
$q Fuller form of name
 
 9 0.15 10 1 32 1.15 0.00
$v Form subdivision
 
 7 0.12 17 1 42 1.33 0.00
$x General subdivision
 
 4 0.07 4 1 34 1.35 0.00
610 — Subject Added Entry - Corporate Name
$a Corporate name or jurisdiction name as entry element
 
 192 3.24 214 1 24 1.20 0.00
$b Subordinate unit
 
 85 1.43 116 1 24 1.44 0.00
$d Date of meeting or treaty signing
 
 3 0.05 5 1 4 1.08 0.00
$n Number of part/section/meeting
 
 3 0.05 5 1 6 1.08 0.00
$t Title of a work
 
 5 0.08 6 1 8 1.07 0.00
$v Form subdivision
 
 93 1.57 105 1 14 1.18 0.00
$x General subdivision
 
 91 1.53 112 1 22 1.33 0.00
$z Geographic subdivision
 
 1 0.02 2 1 12 1.41 0.00
611 — Subject Added Entry - Meeting Name
$a Meeting name or jurisdiction name as entry element
 
 7 0.12 7 1 8 1.12 0.00
$c Location of meeting
 
 3 0.05 3 1 8 1.09 0.00
$d Date of meeting
 
 6 0.10 6 1 8 1.10 0.00
$v Form subdivision
 
 3 0.05 3 1 8 1.11 0.00
$x General subdivision
 
 1 0.02 1 1 10 1.14 0.01
630 — Subject Added Entry - Uniform Title
$a Uniform title
 
 14 0.24 17 1 21 1.28 0.00
$f Date of a work
 
 1 0.02 1 1 4 1.24 0.01
$l Language of a work
 
 1 0.02 1 1 7 1.19 0.00
$n Number of part/section of a work
 
 1 0.02 1 1 6 1.25 0.02
$p Name of part/section of a work
 
 2 0.03 2 1 24 1.62 0.00
$v Form subdivision
 
 2 0.03 2 1 18 1.26 0.00
650 — Subject Added Entry - Topical Term
$0 Authority record control number or standard number
 
 7 0.12 13 1 31 2.30 0.00
$2 Source of heading or term
 
 135 2.28 649 1 84 4.22 0.00
$a Topical term or geographic name entry element
 
 1,697 28.62 3,946 1 151 2.44 0.00
$b Topical term following geographic name entry element
 
 1 0.02 2 1 4 1.07 0.01
$v Form subdivision
 
 670 11.30 1,314 1 35 1.90 0.00
$x General subdivision
 
 1,004 16.93 2,568 1 162 2.05 0.00
$y Chronological subdivision
 
 13 0.22 18 1 25 1.56 0.00
$z Geographic subdivision
 
 815 13.74 1,632 1 66 2.30 0.00
651 — Subject Added Entry - Geographic Name
$0 Authority record control number or standard number
 
 6 0.10 7 1 16 1.27 0.00
$2 Source of heading or term
 
 36 0.61 45 1 26 1.19 0.00
$a Geographic name
 
 209 3.52 295 1 131 1.53 0.00
$v Form subdivision
 
 106 1.79 219 1 70 1.38 0.00
$x General subdivision
 
 123 2.07 181 1 38 1.74 0.00
$y Chronological subdivision
 
 21 0.35 26 1 20 1.31 0.00
$z Geographic subdivision
 
 10 0.17 13 1 24 1.78 0.00
653 — Index Term - Uncontrolled
$a Uncontrolled term
 
 237 4.00 495 1 60 2.73 0.00
655 — Index Term - Genre/Form
$0 Authority record control number
 
 5 0.08 7 1 11 1.36 0.00
$2 Source of term
 
 266 4.49 612 1 24 1.38 0.00
$a Genre/form data or focus term
 
 269 4.54 617 1 29 1.47 0.00
$v Form subdivision
 
 1 0.02 1 1 7 1.01 0.00
70X-75X: Added Entry
700 — Added Entry - Personal Name
$6 Linkage
 
 5 0.08 6 1 24 1.43 0.00
$a Personal name
 
 1,505 25.38 2,565 1 421 1.48 0.00
$c Titles and other words associated with a name
 
 88 1.48 99 1 85 1.20 0.00
$d Dates associated with a name
 
 251 4.23 287 1 414 1.24 0.00
$e Relator term
 
 245 4.13 424 1 660 1.74 0.00
$n Number of part/section of a work
 
 1 0.02 3 1 416 3.16 0.10
$p Name of part/section of a work
 
 2 0.03 2 1 59 3.28 0.04
$q Fuller form of name
 
 45 0.76 47 1 36 1.11 0.00
$s Version
 
 2 0.03 5 1 41 1.85 0.05
$t Title of a work
 
 20 0.34 28 1 180 1.33 0.00
710 — Added Entry - Corporate Name
$6 Linkage
 
 7 0.12 10 1 8 1.19 0.00
$a Corporate name or jurisdiction name as entry element
 
 1,492 25.16 1,829 1 23 1.17 0.00
$b Subordinate unit
 
 658 11.10 855 1 24 1.26 0.00
$d Date of meeting or treaty signing
 
 1 0.02 2 1 12 1.05 0.00
$e Relator term
 
 89 1.50 97 1 13 1.08 0.00
$n Number of part/section/meeting
 
 1 0.02 2 1 10 1.06 0.00
$t Title of a work
 
 2 0.03 2 1 12 1.09 0.00
711 — Added Entry - Meeting Name
$a Meeting name or jurisdiction name as entry element
 
 13 0.22 13 1 13 1.11 0.00
$c Location of meeting
 
 13 0.22 13 1 13 1.12 0.00
$d Date of meeting
 
 13 0.22 13 1 13 1.12 0.00
$n Number of part/section/meeting
 
 5 0.08 5 1 12 1.11 0.00
730 — Added Entry - Uniform Title
$6 Linkage
 
 1 0.02 1 1 5 1.19 0.01
$a Uniform title
 
 16 0.27 28 1 39 1.12 0.00
$n Number of part/section of a work
 
 1 0.02 1 1 6 1.13 0.01
$p Name of part/section of a work
 
 2 0.03 2 1 8 1.22 0.00
$s Version
 
 1 0.02 1 1 7 1.17 0.01
740 — Added Entry - Uncontrolled Related/Analytical Title
$a Uncontrolled related/analytical title
 
 27 0.46 40 1 187 1.25 0.00
$n Number of part/section of a work
 
 1 0.02 1 1 16 1.61 0.08
$p Name of part/section of a work
 
 1 0.02 2 1 16 1.88 0.08
752 — Added Entry - Hierarchical Place Name
$a Country or larger entity
 
 1 0.02 1 1 6 1.01 0.00
$d City
 
 1 0.02 1 1 6 1.01 0.00
76X-78X: Linking Entry
773 — Host Item Entry
$t Title
 
 1 0.02 1 1 3 1.00 0.00
776 — Additional Physical Form Entry
$a Main entry heading
 
 17 0.29 18 1 6 1.17 0.00
$b Edition
 
 2 0.03 2 1 3 1.06 0.00
$c Qualifying information
 
 1 0.02 1 1 4 1.04 0.00
$d Place, publisher, and date of publication
 
 2 0.03 2 1 6 1.04 0.00
$h Physical description
 
 12 0.20 12 1 6 1.19 0.00
$i Relationship information
 
 16 0.27 16 1 15 1.04 0.00
$t Title
 
 35 0.59 36 1 15 1.11 0.00
$w Record control number
 
 1 0.02 1 1 8 1.05 0.00
780 — Preceding Entry
$a Main entry heading
 
 2 0.03 2 1 8 1.05 0.00
$s Uniform title
 
 1 0.02 1 1 5 1.04 0.00
$t Title
 
 4 0.07 5 1 17 1.08 0.00
$w Record control number
 
 2 0.03 4 1 12 1.03 0.00
$x International Standard Serial Number
 
 1 0.02 1 1 12 1.08 0.00
785 — Succeeding Entry
$a Main entry heading
 
 1 0.02 1 1 13 1.10 0.00
$t Title
 
 1 0.02 1 1 15 1.14 0.00
787 — Other Relationship Entry
$t Title
 
 5 0.08 5 1 22 1.03 0.00
$x International Standard Serial Number
 
 2 0.03 2 1 10 1.19 0.00
80X-83X: Series Added Entry
800 — Series Added Entry - Personal Name
$a Personal name
 
 1 0.02 1 1 5 1.01 0.00
$d Dates associated with a name
 
 1 0.02 1 1 5 1.02 0.00
$f Date of a work
 
 1 0.02 1 1 3 1.00 0.00
$t Title of a work
 
 1 0.02 1 1 5 1.01 0.00
$v Volume/sequential designation
 
 1 0.02 1 1 4 1.01 0.00
830 — Series Added Entry - Uniform Title
$6 Linkage
 
 2 0.03 2 1 6 1.05 0.00
$a Uniform title
 
 811 13.68 816 1 7 1.04 0.00
$l Language of a work
 
 2 0.03 2 1 2 1.01 0.00
$n Number of part/section of a work
 
 2 0.03 2 1 4 1.02 0.00
$p Name of part/section of a work
 
 5 0.08 5 1 6 1.05 0.00
$v Volume/sequential designation
 
 262 4.42 265 1 7 1.03 0.00
841-88X: Holdings, Location, Alternate Graphics
852 — Location
$2 Source of classification or shelving scheme
 
 1 0.02 1 1 32 1.05 0.00
$3 Materials specified
 
 7 0.12 7 1 727 1.42 0.00
$a Location
 
 723 12.19 730 1 729 1.12 0.00
$b Sublocation or collection
 
 723 12.19 730 1 729 1.12 0.00
$c Shelving location
 
 1 0.02 1 1 727 1.03 0.00
$h Classification part
 
 2 0.03 2 1 32 1.06 0.00
$i Item part
 
 1 0.02 1 1 276 1.08 0.00
$j Shelving control number
 
 710 11.97 713 1 729 1.10 0.00
$k Call number prefix
 
 2 0.03 2 1 32 1.06 0.00
$m Call number suffix
 
 1 0.02 1 1 32 1.12 0.00
$x Nonpublic note
 
 1 0.02 1 1 33 1.10 0.00
856 — Electronic Location and Access
$3 Materials specified
 
 48 0.81 97 1 25 1.18 0.00
$b Access number
 
 1 0.02 1 1 1 1.00 0.00
$u Uniform Resource Identifier
 
 1,366 23.04 1,492 1 26 1.09 0.00
$y Link text
 
 1,360 22.93 1,455 1 20 1.06 0.00
$z Public note
 
 124 2.09 179 1 22 1.16 0.00
880 — Alternate Graphic Representation
$6 Linkage
 
 33 0.56 91 1 51 4.04 0.00
$a Same as associated field
 
 33 0.56 93 1 51 4.21 0.00
$b Same as associated field
 
 25 0.42 41 1 14 1.56 0.00
$c Same as associated field
 
 26 0.44 34 1 18 1.77 0.00
$d Same as associated field
 
 4 0.07 5 1 31 1.32 0.00
$e Same as associated field
 
 2 0.03 4 1 18 1.45 0.00
$h Same as associated field
 
 8 0.13 8 1 3 1.01 0.01
$i Same as associated field
 
 1 0.02 1 1 8 1.08 0.00
$v Same as associated field
 
 1 0.02 3 1 12 1.34 0.00
OCLCMARC tags
019 — OCLC Control Number Cross-Reference
$a OCLC control number of merged and deleted record
 
 2 0.03 2 1 65 1.37 0.00
029 — Other System Control Number
$a OCLC library identifier
 
 1 0.02 1 1 9 1.19 0.01
$b System control number
 
 1 0.02 1 1 9 1.19 0.01
994 — OCLC-MARC Transaction Code
$a Transaction code
 
 2 0.03 2 1 1 1.00 0.00
$b Institution symbol
 
 2 0.03 2 1 1 1.00 0.00
Locally defined tags of the British Library
592 — Collaboration Note
$a Collaboration note
 
 1 0.02 1 1 3 1.30 0.04
690 — Collection Subset
$2 Source of term
 
 282 4.76 282 1 4 1.08 0.00
$a Collection subset
 
 282 4.76 282 1 4 1.08 0.00
859 — Digital Resource Flag
$a Digital resource flag
 
 1,365 23.02 1,365 1 3 1.03 0.00
$b Category of digital resource
 
 1,365 23.02 1,365 1 3 1.03 0.00
957 — Acquisitions Data
$a Receipt date and method of acquisition code or Cataloguer initials
 
 2 0.03 2 1 9 1.01 0.00
$r Receipt date
 
 2 0.03 2 1 16 1.01 0.00
985 — Cataloguer’s Note
$a Cataloguer’s Note
 
 102 1.72 102 1 9 1.56 0.00
unknown origin
948
$h
 
 2 0.03 2 1 1 1.00 0.00
AQN
$a
 
 1 0.02 1 1 6 1.00 0.00
CAT
$a
 
 5,930 100.00 22,500 1 38 6.38 0.00
$b
 
 5,930 100.00 17,649 1 35 5.05 0.00
$c
 
 5,930 100.00 22,500 1 38 6.46 0.00
$h
 
 5,930 100.00 22,500 1 38 6.46 0.00
$l
 
 5,930 100.00 22,500 1 38 6.46 0.00
FFP
$a
 
 1,282 21.62 1,282 1 2 1.00 0.00
$b
 
 1,282 21.62 1,282 1 2 1.00 0.00
FIN
$a
 
 954 16.09 954 1 2 1.00 0.00
$b
 
 1 0.02 1 1 1 1.00 0.00
$d
 
 951 16.04 951 1 2 1.00 0.00
FMT
$a
 
 5,930 100.00 5,930 1 3 1.00 0.00
LAS
$a
 
 5,930 100.00 5,930 1 2 1.00 0.00
$b
 
 5,930 100.00 5,930 1 2 1.00 0.00
$c
 
 5,930 100.00 5,930 1 2 1.00 0.00
$h
 
 5,930 100.00 5,930 1 2 1.00 0.00
$l
 
 5,930 100.00 5,930 1 2 1.00 0.00
LDO
$d
 
 2 0.03 2 1 6 1.00 0.00
LEO
$a
 
 2 0.03 2 1 71 1.17 0.00
LKR
$a
 
 5 0.08 8 1 46 1.14 0.00
$b
 
 5 0.08 8 1 46 1.14 0.00
$l
 
 5 0.08 8 1 19 1.02 0.00
$m
 
 5 0.08 8 1 46 1.14 0.00
$n
 
 5 0.08 8 1 46 1.14 0.00
PST
$3
 
 2 0.03 2 1 2 1.04 0.02
$4
 
 2 0.03 2 1 4 1.18 0.06
$b
 
 2 0.03 2 1 4 1.18 0.06
$d
 
 2 0.03 2 1 2 1.04 0.02
$e
 
 2 0.03 2 1 1 1.00 0.00
$f
 
 2 0.03 2 1 2 1.04 0.02
$o
 
 2 0.03 2 1 2 1.04 0.02
SID
$a
 
 40 0.67 41 1 4 1.01 0.00
$b
 
 40 0.67 41 1 4 1.01 0.00
SRC
$a
 
 3,577 60.32 3,577 1 131 1.16 0.00
$b
 
 240 4.05 240 1 131 1.17 0.00
TCO
$a
 
 27 0.46 27 1 2 1.00 0.00
$c
 
 27 0.46 27 1 2 1.00 0.00