USMARC Concise Authority: Number and Code Fields (01X-08X)
Fields 010-087 contain control numbers, linking standard numbers, classification and call numbers, codes, and other data elements relating to the authority record.
- 010 - LIBRARY OF CONGRESS CONTROL NUMBER (NR)
- 014 - LINK TO BIBLIOGRAPHIC RECORD FOR SERIAL OR MULTIPART ITEM (R)
- 016 - NATIONAL BIBLIOGRAPHIC AGENCY CONTROL NUMBER (R)
- 020 - INTERNATIONAL STANDARD BOOK NUMBER (R)
- 022 - INTERNATIONAL STANDARD SERIAL NUMBER (R)
- 035 - SYSTEM CONTROL NUMBER (R)
- 040 - CATALOGING SOURCE (R)
- 042 - AUTHENTICATION CODE (NR)
- 043 - GEOGRAPHIC AREA CODE (NR)
- 045 - TIME PERIOD OF HEADING (NR)
- 050 - LIBRARY OF CONGRESS CALL NUMBER (R)
- 052 - GEOGRAPHIC CLASSIFICATION CODE (R)
- 053 - LC CLASSIFICATION NUMBER (R)
- 055 - NATIONAL LIBRARY OF CANADA CALL NUMBER (R)
- 060 - NATIONAL LIBRARY OF MEDICINE CALL NUMBER (R)
- 066 - CHARACTER SETS PRESENT (NR)
- 070 - NATIONAL AGRICULTURAL LIBRARY CALL NUMBER (R)
- 072 - SUBJECT CATEGORY CODE (R)
- 073 - SUBDIVISION USAGE (NR)
- 082 - DEWEY DECIMAL CALL NUMBER (R)
- 083 - DEWEY DECIMAL CLASSIFICATION NUMBER (R)
- 086 - GOVERNMENT DOCUMENT CALL NUMBER (NR)
- 087 - GOVERNMENT DOCUMENT CLASSIFICATION NUMBER (NR)
- 09X - LOCAL CALL NUMBERS
010 - LIBRARY OF CONGRESS CONTROL NUMBER (NR)
A unique number assigned to a record by LC or a Linked Systems Project partner contributing authority records to the National Coordinated Cataloging Operations database. (010 is an agency-assigned field.)
Indicators
Both undefined; each contains a blank (#)
Subfield Codes
- $a - LC control number (NR)
- $z - Cancelled/invalid LC control number (R)
Example
010 |
##$an##80022124# $zn##80014241# |
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014 - LINK TO BIBLIOGRAPHIC RECORD FOR SERIAL OR MULTIPART ITEM (R)
The control number copied from field 001 of a USMARC bibliographic record for a serial or a multipart item that is cataloged as a set.
Indicators
Both undefined; each contains a blank (#)
Subfield Codes
- $a - Control number of related bibliographic record
(NR)
The USMARC code (enclosed in parentheses) for the organization that created the related bibliographic record precedes the control number. (The source of the code is the USMARC Code List for Organization that is maintained by the Library of Congress. - $6 - Linkage (NR)
The linking tag number of the associated field and a two-character occurrence number (right justified with a zero in the unused position) that link fields that are alternate graphic representations of each other. Subfield $6 is the first subfield in the field and is structured as follows: [linking tag]-[occurrence number].
Examples
014 |
##$a(DLC)###85032313# |
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016 - NATIONAL BIBLIOGRAPHIC AGENCY CONTROL NUMBER (R)
Unique numbers that have been assigned to a record by a national bibliographic agency other than the Library of Congress.
Indicators
- First - National bibliographic agency
A value that either identifies a specific national bibliographic agency or refers to a code in subfield $2 (Source)- # - National Library of Canada
- 7 - Agency identified in subfield $2
- Second - Undefined
Contains a blank (#)
Subfield Codes
- $a - Record control number (NR)
- $z - Cancelled/invalid LC control number (R)
- $2 - Source (NR)
Contains the USMARC code of the name of the organization that identifies the national bibliographic agency that was the source of the record control number.
Example
016 |
##$a0010C0008## |
016 |
##$a0115E5000F# |
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020 - INTERNATIONAL STANDARD BOOK NUMBER (R)
The ISBN, terms of availability, and any cancelled/invalid ISBN copied from field 020 of a USMARC bibliographic record for a multipart item that is cataloged as a set. (The ISBN is an agency-assigned data element.)
Indicators
Both undefined; each contains a blank (#)
Subfield Codes
- $a - International Standard Book Number
(NR)
The valid ISBN and any parenthetical qualifying information. ISBN and the embedded hyphens may be generated. - $c - Terms of availability (NR)
The price or a brief statement of availability and any parenthetical information qualifying the information. - $z - Cancelled/invalid ISBN (R)
A cancelled or invalid ISBN and any parenthetical qualifying information. ISBN (invalid) and the embedded hyphens may be generated. - $6 - Linkage (NR)
See the description of subfield $6 under field 014.
Examples
020 |
##$a0882335073 (set) |
020 |
##$a0882335065 (v. 2 : jacket) |
020 |
##$a8449955289 (v. 1) $c$15.00 (per vol.) |
020 |
##$a0870686933 (v. 1 : alk. paper) $z0870684302 (jacket) |
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022 - INTERNATIONAL STANDARD SERIAL NUMBER (R)
The ISSN and/or any incorrect and cancelled ISSNs copied from field 022 of a USMARC bibliographic record for a serial. (The ISSN is an agency-assigned data element.)
Indicators
Both undefined; each contains a blank (#)
Subfield Codes
- $a - International Standard Serial Number
(NR)
The valid ISSN for the serial. ISSN may be generated. - $y - Incorrect ISSN (R)
ISSN (incorrect) may be generated. - $z - Cancelled ISSN (R)
ISSN (cancelled) may be generated. - $6 - Linkage (NR)
See the description of subfield $6 under field 014.
Examples
022 |
##$a0083-0674 |
022 |
##$a0046-225X $y0046- 2254 |
022 |
##$a0410-7543 $z0527-740X |
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035 - SYSTEM CONTROL NUMBER (R)
Contains the control number for the record in a system other than the one whose control number is contained in field 001 (Control Number), field 010 (Library of Congress Control Number), or field 016 (National Bibliographic Agency Control Number).
Indicators
Both undefined; each contains a blank (#)
Subfield Codes
- $a - System control number (NR)
The NUC symbol (enclosed in parentheses) of the organization originating the system control number precedes the number. (The NUC symbol is taken from the Symbols of American Libraries and is an authoritative-agency data element.) - $z - Cancelled/invalid system control number (R)
- $6 - Linkage (NR)
See the description of subfield $6 under field 014.
Examples
035 |
##$a(CaBVAU)2835210335 |
035 |
##$a(OCoLC)1553114 $z(OCoLC)153114 |
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040 - CATALOGING SOURCE (R)
The NUC symbol for or the name of the organization(s) that created the original authority record, assigned USMARC content designation and transcribed the record into machine-readable form, or modified an existing USMARC record. These data and the code in 008/39 (Cataloging source) specify the parties responsible for the authority record. (The NUC symbol is taken from the Symbols of American Libraries and is an authoritative-agency data element.)
Indicators
Both undefined; each contains a blank (#)
Subfield Codes
- $a - Original cataloging agency (NR)
- $b - Language of cataloging (NR)
A USMARC code for the language used in the textual portions of the record. (The code is taken from the USMARC Code List for Languages and is an authoritative-agency data element.) - $c - Transcribing agency (NR)
- $d - Modifying agency (R)
- $e - Description conventions (NR)
Contains information specifying the description rules used in formulating the heading and reference structure when field 008/10 (Descriptive cataloging rules) contains code z (Other). - $f - Subject heading/thesaurus conventions
(NR)
A USMARC code for the subject heading/thesaurus conventions used when field 008/11 contains code z. (The code is taken from USMARC Code List for Relators, Sources, Description Conventions and is an authoritative-agency data element.)
Examples
040 |
##$aDLC $cDLC |
040 |
##$aSd $cICU |
040 |
##$aICU $cICU |
040 |
##$aMH $cMH $dDLC |
040 |
##$aNc $cDLC $dDLC |
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042 - AUTHENTICATION CODE (NR)
The code assigned by the authentication center that reviews and upgrades, if necessary, an authority record in a national database. Codes have not been defined.
Indicators
Both undefined; each contains a blank (#)
Subfield Code
- $a - Authentication code (R)
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043 - GEOGRAPHIC AREA CODE (NR)
Up to three USMARC codes for geographic areas associated with the 1XX heading in an established heading record or a subdivision record. The code is seven characters in length. (The code is taken from the USMARC Code List for Geographic Areas and is an authoritative-agency data element.)
Indicators
Both undefined; each contains a blank (#)
Subfield Code
- $a - Geographic area code (R)
Examples
043 |
##$an-us-mi |
043 |
##$ae-fr--- $ae-pl--- |
043 |
##$ae-gx--- |
043 |
##$an-cn--- |
043 |
##$af-ke--- |
043 |
##$asa----- |
043 |
##$an-cn-on |
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045 - TIME PERIOD OF HEADING (NR)
A time period code (subfield $a) and/or a formatted time period (subfield $b or $c) associated with the 1XX heading in an established heading record or a subdivision record.
Indicators
- First - Type of time period in subfield $b or $c
A value that indicates whether a subfield $b or $c is present and, if so, indicates the type of time period contained in the subfield.- # - Subfield $b or $c not present
- 0 - Single date/time
- 1 - Multiple single dates/times
Multiple $b and/or $c subfields are present; each contains a formatted date/time. - 2 - Range of dates/times
Two $b and/or $c subfields are present and together express a range of dates and/or times.
- Second - Undefined
Contains a blank (#)
Subfield Codes
- $a - Time period code (R)
A four-character alphanumeric code derived from the "Time Period Code Table" for B.C. and A.D. time periods. The table is found in the USMARC Format for Authority Data under the description of field 045, subfield $a. - $b - Formatted 9999 B.C. through A.D. time period
(R)
A time period recorded in the pattern yyyymmddhh and preceded by a code for the era ( c for B.C.; d for A.D.) - $c - Formatted pre-9999 B.C. time period
(R)
A time period that consists of as many numeric characters as are needed to represent the number of pre-9999 years B.C.
Examples
045 |
##$aa0d6 |
045 |
0#$c2500000000 |
045 |
1#$bd1972 $bd1975 |
045 |
2#$bd186405 $bd186408 |
045 |
2#$c25000 $c15000 |
045 |
##$ad7d9 |
045 |
##$aa-c- |
045 |
##$ac4c6 |
045 |
##$ad8h2 |
045 |
2#$bd1791 $bd1797 |
045 |
2#$c225000000 $c70000000 |
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050 - LIBRARY OF CONGRESS CALL NUMBER (R)
A call number for a series when all or part of the series is classified as a collected set or with the main series. The classification number is taken from the Library of Congress Classification and/or the LC Classification Additions and Changes.
Indicators
- First - Undefined
Contains a blank (#) - Second - Source of call number
A value that indicates whether the call number has been assigned by the Library of Congress or another organization.- 0 - Assigned by LC
- 4 - Assigned by agency other than LC
The NUC symbol of the assigning organization is contained in subfield $5.
Subfield Codes
- $a - Classification number (NR)
(The classification number is an authoritative-agency data element.) - $b - Item number (NR)
Organizations that use the Cutter-Sanborn Three-Figure Author Table may conform to LC item number practice by applying Subject Cataloging Manual: Shelflisting procedures. - $d - Volumes/dates to which call number applies
(NR)
A statement that is used only when the call number does not apply to all items in the series. Applies to: may be generated. - $5 - Institution to which field applies
(R)
The USMARC code for the organization that assigned the call number when the second indicator position contains value 4. Subfield $5 is the last subfield in the field. The source of the code is the USMARC Code List for Organizations that is maintained by the Library of Congress. - $6 - Linkage (NR)
See the description of subfield $6 under field 014.
Examples
050 |
#0$aQC851 $b.L455 subser. |
050 |
#4$aQH198.H3 $bC66 $5DI |
050 |
#0$aDQ3 $b.S6 |
050 |
#0$aQE462.K5 $bI59 |
050 |
#0$aQK1 $b.U45 $dno. 1-200, copy 1; no. 201- |
050 |
#4$aHD1694.S6 $bC55 $5DI |
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052 - GEOGRAPHIC CLASSIFICATION CODE (R)
A code for a geographic area associated with the 151 field in an established heading record or a subdivision record for a geographic name. The geographic classification code is derived from the Library of Congress Classification Class G and expanded Cutter number lists for place names. (The geographic classification area code and the subarea code are authoritative-agency data elements.)
Indicators
Both undefined; each contains a blank (#)
Subfield Codes
- $a - Geographic classification area code
(NR)
A four- to six-character numeric code for the main geographic area associated with the heading. The code is derived from the LC class G schedule by dropping the letter G. - $b - Geographic classification subarea code
(R)
An alphanumeric code, assigned from expanded Cutter number lists, that represents a subarea of the geographic area coded in subfield a. Cutter numbers for places in the U.S. are published in Geographic Cutters.
Examples
052 |
##$a4411 |
052 |
##$a4034 $bR4 $bR8 |
052 |
##$a4034 $bR4 $bR8 |
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053 - LC CLASSIFICATION NUMBER (R)
A single LC classification number or a range of numbers associated with a 1XX heading in an established heading record or a subdivision record. The classification number is taken from the Library of Congress Classification and/or the LC Classification Additions and Changes. The hyphen (-) between the two class numbers in a range of numbers may be generated based on the presence of both subfields $a and $b. (053 is an authoritative-agency data element.)
Indicators
- First - Undefined
Contains a blank (#) - Second - Source of classification number
- 0 - Assigned by LC
- 4 - Assigned by agency other than LC
The NUC symbol of the assigning organization is contained in subfield $5.
Subfield Codes
- $a - Classification number element--single number or beginning number of span (NR)
- $b - Classification number element--ending number of span (NR)
- $c - Explanatory term (NR)
A phrase or term that specifies the topic of the classification number when the heading is represented in more than one place in the classification schedules. The parentheses that enclose the phrase or term may be generated. - $5 - Institution to which field applies
(NR)
See the description of subfield $5 under field 050.
Examples
053 |
##$aPS3557.R48998 |
053 |
##$aBX8627 |
053 |
##$aP301 $cLinguistics |
053 |
##$aE201 $bE298 |
053 |
##$aML1160 $cHistory |
053 |
##$aMT728 $cInstruction and study |
053 |
##$aBX850 $bBX875 $cDocuments |
053 |
#4$aHD1694.S6 $5DI |
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055 - National Library of Canada CALL NUMBER (R)
Contains the call number for a series assigned in Canada if the institution has classified all of part of the series as a collected set. The second indicator values distinguish between content actually assigned by the National Library of Canada and that assigned by an organization other than NLC.
Indicators
- Undefined
Contains a blank (#) - Second - Source of call number
- 0 - Assigned by NLC
- 4 - Assigned by agency othan than NLC
Subfield Codes
- $a - Classification number (NR)
- $b - Item number (NR)
- $d - Volumes/dates to which call number applies (NR)
- $5 - Institution to which field applies (R)
- $6 - Linkage (NR)
Examples
055 |
#0$aF5499 H31 bA32 |
055 |
#4$aLC1046.13 $bA4 $5CaOON |
055 |
#0$aRS144 O5 $bP73 $d$a1970-1979 |
055 |
#0$aHB31 $bE285 |
055 |
#0$aSD388 $bF557 |
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060 - NATIONAL LIBRARY OF MEDICINE CALL NUMBER (R)
A call number for a series when all or part of the series is classified as a collected set or with the main series. The classification number is taken from the National Library of Medicine Classification schedules QS-QZ and W or from the Library of Congress Classification schedules as used by NLM for peripheral and related topics.
Indicators
- First - Undefined
Contains a blank (#) - Second - Source of call number
A value that indicates whether the call number has been assigned by the National Library of Medicine or another organization.- 0 - Assigned by NLM
- 4 - Assigned by agency other than NLM
The NUC symbol of the assigning organization is contained in subfield $5.
Subfield Codes
- $a - Classification number (NR)
(The classification number is an authoritative-agency data element.) - $b - Item number (NR)
NLM uses the Cutter-Sanborn Three-Figure Author Table and a special numbering scheme in classes W1 and W3 to create item numbers. - $d - Volumes/dates to which call number applies (NR)
- $5 - Institution to which field applies (R)
- $6 - Linkage (NR)
See the descriptions of subfields $d and $5 under field 050 and subfield $6 under field 014.
Examples
060 |
#0$aW1 $bJO706M |
060 |
#4$aW1 $bRI218 $5CLU-M |
060 |
#0$aW1 $bJO706M |
060 |
#0$aWO 700 $bT776 |
060 |
#4$aW1 $bRI218 $5CLU-M |
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066 - CHARACTER SETS PRESENT (NR)
Information that indicates that the character set present in a record is other than the ANSEL, the ASCII, or the USMARC Greek, subscript or superscript character sets. A detailed description of the standard escape sequences used in USMARC records is provided in USMARC Specifications for Record Structure, Character Sets, Tapes.
Indicators
Both undefined; each contains a blank (#)
Subfield Codes
- $a - Non-ASCII G0 default character set designation
(NR)
The Intermediate and Final characters of the escape sequence that designates and invokes the default non-ASCII or USMARC G0 character set. - $b - Non-ANSEL G1 default character set designation
(NR)
The Intermediate and Final characters of the escape sequence that designates and invokes the default non-ANSEL G1 character set. - $c - Alternate graphic character set identification
(R)
The Intermediate and Final characters of each escape sequence that designates an alternate graphic character set used in a record.
Examples
066 |
##$a(N |
066 |
##$a$1 |
066 |
##$b$)1 |
066 |
##$b)Q |
066 |
##$c)S |
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070 - NATIONAL AGRICULTURAL LIBRARY CALL NUMBER (R)
A call number assigned by the National Agricultural Library to a series when all or part of the series is classified as a collected set or with the main series. (070 is an agency-assigned field.)
Indicators
Both undefined; each contains a blank (#)
Subfield Codes
- $a - Classification number (NR)
- $b - Item number (NR)
- $d - Volume/dates to which call number applies (NR)
- $6 - Linkage (NR)
See the descriptions of subfields $d and $5 under field 050 and subfield $6 under field 014.
Examples
070 |
##$a99.8 $bF76322 |
070 |
##$aQH545.A1T6 |
070 |
##$a99.8 $bF76322 |
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072 - SUBJECT CATEGORY CODE (R)
A code for the subject category that is associated with the 1XX field in an established heading record or a node label record.
Indicators
- First - Undefined
Contains a blank (#) - Second - Code source
A value that indicates the source of the subject category code.- # - No information provided
The source of the code is the same as the subject heading system/thesaurus identified in 008/11. - 0 - National Agricultural Library subject category
code list
(The subject category code is taken from the AGRIS: Subject Categories and is an authoritative-agency data element.) - 7 - Code source specified in subfield $2
The USMARC code for the source is contained in subfield $2.
- # - No information provided
Subfield Codes
- $a - Subject category code (NR)
The code for the broad subject category to which the heading belongs in a hierarchically arranged thesaurus. - $x - Subject category code subdivision
(R)
The level of specificity within the broader subject coded in subfield $a. - $2 - Code source (NR)
A USMARC code that identifies the thesaurus used to assign the subject category code when the second indicator position contains value 7. (The source code is taken from USMARC Code List for Relators, Sources, Description Conventions and is an authoritative-agency data element.) - $6 - Linkage (NR)
See the description of subfield $6 under field 014.
Examples
072 |
##$aC23. $x739. $x102 |
072 |
#0$aQ200 |
072 |
##$aL1. $x346. $x596. $x463 |
072 |
##$aC4. $x697 |
072 |
##$aZ1. $x58. $x266. $x513 |
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073 - SUBDIVISION USAGE (NR)
A code specifying the topical or geographic subject terms with which the 1XX heading in a subdivision record may be used in a particular thesaurus.
Indicators
Both undefined; each contains a blank (#)
Subfield Codes
- $a - Subdivision usage (R)
A category designator code that specifies the category of terms with which the subdivision may be used. - $z - Source (NR)
A USMARC code that identifies the thesaurus used to assign the category designator code. The source code is the USMARC Code List for Relators, Sources, Description Conventions that is maintained by the Library of Congress - $6 - Linkage (NR)
See the description of subfield $6 under field 014.
Examples
073 |
##$aE1 $aE2 $aE3 $aE4 $aE6 $aE7 $aN2 $zmesh |
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082 - DEWEY DECIMAL CALL NUMBER (R)
A call number for a series when all or part of the series is classified as a collected set or with the main series. The classification number is taken from the Dewey Decimal Classification; the Abridged Dewey Decimal Classification; and/or the DC&: Dewey Decimal Classification Additions, Notes and Decisions.
Indicators
- First - Type of edition
A value that indicates whether the classification number is taken from the full or the abridged edition.- 0 - Full
- 1 - Abridged
- Second - Source of call number
- # - No information provided
Indicates that the source of the class/call number is not provided. - 0 - Assigned by LC
- 4 - Assigned by agency other than LC
See the description of the second indicator under field 050.
- # - No information provided
Subfield Codes
- $a - Classification number (NR)
(The classification number is an authoritative-agency data element.) - $b - Item number (NR)
- $d - Volumes/dates to which call number applies
(NR)
A statement used only when the call number does not apply to all items in the series. - $2 - Edition number (NR)
The number of the edition from which the class number is assigned. The abbreviation dc that may precede the edition number may be generated. - $5 - Institution to which field applies (R)
- $6 - Linkage (NR)
See the descriptions of subfields $a, $d, and $5 under field 050 and subfield $6 under field 014.
Examples
082 |
00$a780.92 $220 |
082 |
10$a552 $212 |
082 |
00$a345.73 $220 |
082 |
00#a949.4 $220 |
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083 - DEWEY DECIMAL CLASSIFICATION NUMBER (R)
A single Dewey classification number or a range of numbers associated with a 1XX heading in an established heading record or a subdivision record. The classification number is taken from the Dewey Decimal Classification; the Abridged Dewey Decimal Classification; and/or the DC&: Dewey Decimal Classification Additions, Notes and Decisions. The hyphen (-) between the two class numbers in a range of numbers may be generated based on the presence of both subfields $a and $b.
Indicators
- First - Type of edition
See the description of the first indicator under field 082.- 0 - Full
- 1 - Abridged
- Second - Source of call number
See the description of the second indicator under field 050.- 0 - Assigned by LC
- 4 - Assigned by agency other than LC
Subfield Codes
- $a - Classification number element--single number or beginning number of span (NR)
- $b - Classification number element--ending number of
span (NR)
(In subfields $a and $b, the classification number is an authoritative-agency data element.) - $c - Explanatory term (NR)
- $z - Table identification--table number (NR)
- $2 - Edition number (NR)
- $5 - Institution to which field applies (NR)
- $6 - Linkage (NR)
See the descriptions of subfield $c under field 053, subfield $2 under field 082, and subfield $6 under field 014.
Examples
083 |
00$a616.980213 $220 |
083 |
00$a951 $220 |
083 |
04$a411 $220 $5[organization code] |
083 |
00$z2 $a51 $220 |
083 |
00$a940.5481 $b940.5482 $220 |
083 |
00$a549.23 $cMineralogy $220 |
083 |
00$z4 $a3 $cLanguage dictionaries $220 |
083 |
04$a822.3/3 $220 $5[organization code] |
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086 - GOVERNMENT DOCUMENT CALL NUMBER (NR)
A government document call number for a series when all or part of the series is classified as a collected set or with a main series (646, Series Classification Practice, subfield $a, code c or m). The organization assigning the number may be identified in subfield $5.
Field 086 may also contain the volumes/dates to which the number applies. Varying call numbers for different ranges of volumes/dates within a series or different copies or sets are contained in separate occurrences of field 086.
Indicators
- First - Number source
- # - Number specified in subfield $2
- 0 - Superintendent of Documents Classification System
- 1 - Government of Canada Publications: Outline of Classification
- Second - Undefined
Contains a blank (#)
Subfield Codes
- $a - Call number (NR)
- $d - Volumes/dates to which call number applies (NR)
- $z - Cancelled/invalid call number (NR)
- $2 - Number source (NR)
- $5 - Institution to which field applies (NR)
- $6 - Linkage (NR)
See the description of subfield $5 under field 050 and subfield $6 under field 014.
Examples
086 |
##$aHEU/G74.3C49 $2ordocs |
086 |
0#$aA 13.28:F 61/2/981 Glacier |
086 |
1#$aIC cat no. CS13-211 |
086 |
##$aGM.40i5: $2ordocs |
086 |
##$aHEU/G74.4B1: $2ordocs |
086 |
##$aWR.4G91: $d1975- $2ordocs |
086 |
##$aA 1.1: $zA 1.1/3:984 |
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087 - GOVERNMENT DOCUMENT CLASSIFICATION NUMBER (NR)
A single government document classification number or number stem or a number span associated with a 1XX heading in an established heading record. The classification number(s) may be qualified by explanatory information when the heading is represented by more than one number in the same classification scheme.
Indicators
- First - Number source
- # - Source specified in subfield $2
- 0 - Superintendent of Documents Classification System
- 1 - Government of Canada Publications: Outline of Classification
- Second - Undefined
Contains a blank (#)
Subfield Codes
- $a - Classification number element--Single number or beginning number of span (NR)
- $b - Classification number element--Ending number of span (NR)
- $c - Explanatory information (NR)
- $2 - Number source (NR)
Examples
087 |
0#$aY 4.N 16 |
087 |
1#$aFs-85 |
087 |
##$aWR $c1987- $2ordocs |
087 |
0#$aHE 20.8216 |
087 |
##$aSTA 993 $2nydocs |
087 |
1#$aFs-20 $bFs-29 |
087 |
##$aY/G29/2 $c1987- $2ordocs |
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09X - LOCAL CALL NUMBERS
The 090-099 fields are reserved for a locally-assigned call number for a series when all or part of the series is classified as a collected set or with the main series.