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WorldCat support Documentation OCLC Authorities User Guide Comments? Abstract & revision notes About this Guide 1 Introduction 2 Accessing the OCLC Authority File 3 Authority Record Displays 4 Phrase Searching 5 Numeric Searching 6 Keyword and Command Line Searching in OCLC Connexion 7 Derived Search Key Searching 8 Viewing Search Results 9 Editing Authority Records 10 Using Save Files 11 Creating and Using Constant Data 12 Exporting Authority Records 13 Creating and Updating OCLC Authority File Records (NACO Only) A Passport Commands B Types of Records and Displays

C OCLC Authority Record Format

C.1 OCLC Authority Records C.2 Fixed Field Mnemonic Labels C.3 Fixed Field Element Definitions C.4 Variable Field Tag Groups and Mnemonic Labels C.5 Variable Field Definitions D Indexed Fields and Subfields E Change Requests Authorities Glossary

C OCLC Authority Record Format

Appendix overview

Appendix C describes the fixed field element mnemonic labels and codes, and variable field tag groups, mnemonic labels, and subfields.

C.1 OCLC Authority Records

Authority records

An authority record is a collection of information about one name, uniform title, or topical term heading. Each authority record contains the established form of the heading, see from references, see also from references, and notes. The record also contains coded data that describes characteristics of the record.

Records have one fixed field element area that contains coded information from the MARC 21 Leader and 008 field. Records have many variable fields that usually contain textual information. The following table describes the record and field size limits.

Item	Limit
Record size	12,000
Field size	9,999
Number of variable fields in one record	90

All records in this appendix are shown as they appear in CatME^TM.

Mnemonic display

The CatME mnemonic authority record display shows MARC21 fixed field elements and content designators.

CatME: mnemonic authority record display

The mnemonic display is the CatME default format.

The mnemonic display is Passport's default format for Cataloging Search, and for all Interlibrary Loan and WorldCat® authorization modes. All other modes use the tagged display.

Tagged display

The tagged CatME authority record display uses numeric tags only.

CatME: tagged authority record display

C.2 Fixed Field Mnemonic Labels

Passport mnemonic fixed field positions

This table shows the position of the labels in the fixed field of a Passport mnemonic display.

Line	Column
	1	2	3	4
1	Type of Record	In-process note	[blank column]
2	OCLC ARN	Status of record		Data entered in file
3	[blank line]
4	Heading use	Status of heading		Status of references
5	Subject heading system	Geographic subdivision instructions
6	Series type	Series numbering information

The system supplies labels when the data exists. Nothing appears unless the codes are present. For example, the last line (line 6) contains information only when the heading represents a series.

Passport mnemonic code equivalents

The following table lists in alphabetical order the labels that may appear in the fixed field portion of a Passport mnemonic display and the equivalent code for the tagged display.

Label	Definition	Code
ARN: xxxxxxxx	Unique identifier assigned by the OCLC system to each record as it enters the Authority File	ARN:xxxxxxxx
AUTHORITY RECORD	z is the only applicable code for an authority record. It appears in every record	Type: z
BEING UPDATED	Record is being updated and should not be used until updating is completed	Upd status: b
DIRECT	Subdivided geographically—direct (applicable to topical subject headings only)	Geo subd: d
EARLY NOTICE RECORD	Authority record does not contain complete authority data, e.g., applicable tracings	Enc lvl: o
ENTERED: yyyymmdd	Date the record was first loaded in the system
ESTABLISHED HEADING	Fully established heading that has been used on a bibliographic record	Auth status: a
EVALUATED	References have been evaluated and are consistent with the heading	Ref status: a
INDIRECT	Subdivided geographically—indirect (applicable to topical subject headings only)	Geo subd: i
LC	Appropriate for use as an LC subject heading	Subj: a
LC CHILDREN'S	Subject heading for children's literature	Subj: b
MEMORANDUM	Heading has been established but has not been used on a bibliographic record	Auth status: b
MONO SERIES	Heading is for a monographic series (i.e., represents a series consisting of individual volumes and/or subseries which may be cataloged separately)	Series: a
MULTIPART ITEM	Heading is for a multipart item (i.e., represents a monographic publication consisting of individual items which may be cataloged separately)	Series: b
NAL	National Agricultural Library subject heading	Subj: d
NAME	Heading is appropriate for use as a main or added entry	Name use: a
NLC/ENG	National Library of Canada subject heading, English	Subj: k
NLC/FRE	National Library of Canada subject heading, French	Subj: v
NLM	National Library of Medicine subject heading	Subj: c
NOT EVALUATED	References have not been evaluated and are not necessarily consistent with the heading	Ref status: b
NOT SUBD GEOG	Cannot be subdivided geographically (applicable to topical subject headings only)	Geo subd: [blank]
NUMBERED	Heading represents a numbered series	Ser num: a
NUMB/UNNUMB	Heading represents a series whose numbering varies	Ser num: c
OTHER SERIES (SERIAL)	Heading represent a publication for which series-type treatment is required, but the publication does not fit any of the defined categories	Series: z
PRELIMINARY	Heading is established in connection with a bibliographic item that is not available at the time the heading is established.	Auth status: d
PROVISIONAL	Heading cannot be established definitively due to inadequate information	Auth status:c
REC STAT: NEW	This record is new to the Authority File	Rec stat :n
REC STAT: REVISED	This record has been corrected or revised and redistributed	Rec stat: c
REC STAT: UPGRADED	This record has been upgraded to contain necessary data including applicable tracings and encoding level	Rec stat: a
SERIES	Heading is appropriate for use as a series	Ser use: a
SERIES-LIKE PHRASE	Heading is a series-like phrase not to be considered a series	Series: c
SUBJECT	Heading is appropriate for use as a subject	Subj use: a
UNNUMBERED	Heading represent an unnumbered series	Ser num: b

C.3 Fixed Field Element Definitions

The following table lists the fixed field elements in tagged displays and the codes for each element. The elements are listed in alphabetical order. Not all elements and/or codes appear in LC records.

Mnemonic LC-MARC Pos.	Codes	Name	Comments
ARN		Authority Record Number	System-supplied
Auth/Ref: 008/09	a b c d e* f* g*	Kind of record code Established heading record Reference record (untraced reference) Reference record (traced reference) Subdivision record Node label record Established heading and subdivision record Reference and subdivision record	Indicates whether the record is an authority record (1xx is an established heading) or a reference record (1xx is not an established heading)
Auth status: 008/33	a b c d n	Level of establishment code Fully established heading Memorandum (established but not yet used) Provisional Preliminary Not applicable (not an established heading)	Indicates the status of a heading in an authority record
Enc lvl: Leader/17	n o	Encoding level Complete authority record Incomplete authority record	Indicates whether the authority record is complete
Entered: 008/00-05	yyyymmdd	Date entered on file Year, month, day	Date record was created
Geo subd: 008/06	d* i n	Direct/indirect geographic subdivision code Not subdivided geographically Subdivided geographically—direct Subdivided geographically—indirect Not applicable	Indicates whether the 1xx heading can be subdivided geographically
Govt agn: 008/28	i f a s m c l z o u	Type of government agency code Not a government agency International intergovernmental Federal/National Autonomous or semi-autonomous component of Malaysia State, provincial, territorial, dependent, etc. Multistate Multilocal Local Other Government agency—type undetermined Unknown if heading is for government agency No attempt to code	If the heading is the name of a body created or controlled by a government, a one-character code denotes the jurisdictional level of the body. LC does not use this character position. LC always uses a fill character
Mod rec: 008/38	x* s*	Modified record code Record not modified Record is missing characters Record is shortened	Shows whether the machine-readable authority record differs from the manual authority record
Name: 008/32	a b n	Undifferentiated personal name code Differentiated personal name Undifferentiated personal name Not applicable	Indicates whether, because neither date nor distinguishing terms are available, the same heading is used for more than one person
Name use: 008/14	a b	Heading use code—main or added entry Heading appropriate for main or added entry Heading not appropriate for main or added entry	Represents the author aspect of the heading
Rec stat: Leader/05	a* c n	Record status Corrected or revised New	Indicates relationship of record to a file for file maintenance purposes
Ref status: 008/29	a b n	Reference evaluation code Tracings are consistent with heading Tracings are not necessarily consistent with heading Not applicable	Indicates whether references have been evaluated and whether those references are consistent with the heading. Code b is used when the AACR2 form appears as the established heading (1xx) but the references may not have been re-evaluated in their relationships to the new heading
Roman: 008/07	c n	Romanization scheme Converted to Pinyin Not converted to Pinyin No attempt to code	Indicates the Romanization scheme used in formulating the heading in the 1xx field. LC uses only the fill character to code this position.
Rules: 008/10	a b c d n z	Descriptive cataloging rules code Earlier rules AACR1 AACR2 AACR2 compatible heading Not applicable Other	Represents the cataloging rules used for establishing the name, name/title, or uniform title heading in the 1xx field. LC does not currently use a, b, or z. Records on file with a or b are changed to c or d when modified for any other reason
Ser num: 008/13	a b c n	Numbered/unnumbered series code Numbered series Unnumbered series Numbering varies Not applicable	Indicates whether a series is numbered, unnumbered, or varies between the two. The code used reflects the series as a whole; if numbering varies, variations are explained in field 640 and/or 641
Ser use: 008/16	a b	Heading use code—series added entry Heading appropriate as series added entry Heading not appropriate as series added entry	Represents the series aspect of the heading
Series: 008/12	a b c n z	Type of series code Monographic series Multipart item Series-like phrase Not applicable Other	Indicates which type of series the heading in the 1xx field represents, if any
Source: 008/39	c d* u* *	Cataloging source code National bibliographic agency Cooperative cataloging program Other Unknown No attempt to code	Indicates the source of the authority data. Code c is used in records contributed through NACO to LC.
Subd type: 008/17	a* b* c* d* e* n *	Type of subject subdivision Topical Form Chronological Geographic Language Not applicable No attempt to code	LC uses only n to code this position
Subj: 008/11	a b* c* d* k* r* s* v* z* n	Subject heading system/thesaurus code Library of Congress Subject Headings LC subject headings for children's literature Medical Subject Headings (MeSH) National Agricultural Library subject authority file Canadian Subject Headings Art and Architecture Thesaurus Sears List of Subject Headings Répertoire des vedettes-matière Other Not applicable	Indicates the subject heading system used in establishing the heading. Code a routinely appears not only for special subject headings but also for names and uniform title headings valid for use in subject work as LC-established forms
Subj use: 008/15	a b	Heading use code—subject added entry Heading appropriate as subject added entry Heading not appropriate as subject added entry	Represents the subject aspect of the heading
Type: Leader/06	z	Type of record Authority data	Indicates the characteristics of and defines the components of the record
Upd status: 008/31	a b	Record update in process code Record can be used Record is being updated	Indicates whether a change in any field of the record is underway
	*LC does not use; refer to NACO training materials provided by LC for clarification of which fixed-field elements LC uses and which elements NACO participants may use, etc.

C.4 Variable Field Tag Groups and Mnemonic Labels

Each variable field may have between 1 and 9,999 characters. Variable fields have three parts:

Three-digit codes called tags
Two single-digit indicators
One or more subfields

Tag groups

The system groups variable fields by MARC 21 tags. Tags that begin with the same digit have similar functions. In the following list, xx stands for any numeric value (00–99).

Tag group	Function
0xx	Call numbers, control numbers
1xx	Established headings
260	Complex see reference (subject)
360	Complex see also reference (subject)
4xx	See from reference
5xx	See also from reference
6xx	Series treatment information, notes
7xx	Heading linking entries
856	Electronic location and access
9xx	Locally defined headings

Indicators

Indicators supply data for indexing and other system functions. Numbers in the indicator positions have assigned meanings, and in some fields blank ( ) is meaningful. Variable field indicators may have the following combinations:

A number in both positions
A number in one position and a blank space in the other
Two blank spaces

Subfields

Subfields are the smallest logical unit of data in a variable field. Subfield codes (letters or numbers) identify subfields and are preceded by subfield delimiters (‡). Subfields usually have textual descriptions of the authority information, but some contain coded information.

Whenever subfield ‡a is the first subfield, both the delimiter and subfield code are implicit and do not display.

Segmented variable fields

In Passport, when the content of a field exceeds approximately 600 characters, the system displays the field in segments. Each segment consists of:

A line number
A segment number
A tag
Indicators
Data

The line number, tag, and indicators are the same for each segment of the continued field. The system displays segment numbers in brackets after the line number.

Examples:
6 [1] 665 The name of the Baptist . . . American Baptist Education ¶
6 [2] 665 Society. ‡a Works by the Board of Education of the . . . . .

Passport mnemonic vs tagged display

In a Passport mnemonic display, the system supplies some information in square brackets following the text of variable fields. For example, the system displays the established heading for a personal name as follows:

Mnemonic display

100 1 Sayers, Dorothy L. ‡q (Dorothy Leigh), ‡d 1893–1957. [AACR2]

Tagged display

100 1 Sayers, Dorothy L. ‡q (Dorothy Leigh), ‡d 1893–1957.

Heading and tracing information. Some records contain information about the heading or about the relationship between the heading (1xx field) and the tracings (4xx and 5xx fields). Passport mnemonic displays supply this information in brackets. Tagged displays use codes. For example, the system displays a tracing showing the form of the heading for Dorothy Sayers established under earlier cataloging rules as follows:

Mnemonic display

400 10 Sayers, Dorothy Leigh, ‡d 1893–1957 [OLD CATALOG HEADING] ¶

Tagged display

400 10 Sayers, Dorothy Leigh, ‡d 1893–1957 ‡w nna

System-generated labels. The table below lists labels that the system generates for mnemonic displays at the end of a heading or reference field. The system supplies bracketed information if the codes exist in the fixed field or subfield ‡w.

Label Generated	Fixed Field Element or ‡w Code
Following Headings (1xx Fields)
[AACR1]	Rules: b
[AACR2]	Rules: c
[COMPATIBLE]	Rules: d
[EARLIER RULES]	Rules: a
Following Tracings (4xx, 5xx Fields)
[ACRONYM]	‡w, position 1, code d
[BROADER TERM]	‡w, position 1, code g
[EARLIER ESTABLISHED FORM]	‡w, position 3, code e
[EARLIER HEADING]	‡w, position 1, code a
[LATER HEADING]	‡w, position 1, code b
[MUSICAL COMP]	‡w, position 1, code f
[NARROWER TERM]	‡w, position 1, code h
[OLD CATALOG HEADING]	‡w, position 3, code a
[Reference instruction phrase]	‡w, position 1, code i
[REFERENCE: NAMES]	‡w, position 2, code a
[REFERENCE: NAME/SERIES]	‡w, position 2, code e
[REFERENCE: NAME/SUBJECT]	‡w, position 2, code d
[REFERENCE: NAME/SUBJECT/SERIES]	‡w, position 2, code g
[REFERENCE: SERIES]	‡w, position 2, code c
[REFERENCE: SUBJECTS]	‡w, position 2, code b
[REFERENCE: SUBJECT/SERIES]	‡w, position 2, code f

Control subfield ‡w

Subfield ‡w appears only in tagged displays and only in applicable 4xx, 5xx, and 7xx fields.

4xx and 5xx fields. Control subfield ‡w in the 4xx and 5xx fields contains four character positions (designated as ‡w/0, ‡w/1, etc). It provides information about a specific relationship between a heading (1xx field) and tracing (4xx or 5xx field).

Use to indicate whether special instructions apply to the display of the heading in the 4xx or 5xx field.
Use to indicate whether a tracing is restricted to the reference structure of a particular type of authority.
Each character position has a list of coded values that pertain to it. See the following table.

The code definitions are position-dependent. If you code any of character positions 2-4 with a meaningful value [that is, a value other than n (not applicable)], you must code all the preceding positions with n as a placeholder. Succeeding positions need not be coded. If all four positions contain n, subfield ‡w does not appear.

Example:

400 10 Sayers, Dorothy Leigh, ‡d 1893–1957 ‡w nna

The first two positions are coded n because the third position requires code a. The field contains a form of Sayers' name established under earlier cataloging rules. No code is needed in the fourth position because it does not apply to this tracing.

Position	Code	Description
1 (w/0)		Special Relationship • Specifies the relationship between the tracing and the heading.
	a	Earlier heading
	b	Later heading
	d	Acronym
	f	Musical composition
	g	Broader term
	h	Narrower term
	i	Reference instruction phrase in subfield ‡i
	n	Not applicable
2 (w/1)		Tracing Use Restriction • Indicates the authority reference structure in which the tracing is appropriate.
	a	Name reference structure only
	b	Subject reference structure only
	c	Series reference structure only
	d	Name and subject reference structures
	e	Name and series reference structures
	f	Subject and series reference structures
	g	Name, subject, and series reference structures
	n	Not applicable
3 (w/2)		Earlier Form of Heading • Indicates whether the 4xx field is an earlier form of the heading established in the relevant national authority file or in an authority file other than the national authority file.
	a	Pre-AACR2 form of heading (national name authority file)
	e	Earlier established form of heading (national authority file)
	n	Not applicable. [Until all pre-1981 tracings have been evaluated, some 4xx fields carry earlier codes: b (AACR1), c (AACR2), or d (AACR2-compatible)]
	o	Earlier established form of heading (other authority file).
4 (w/3)		Reference Display • Enables the generation or surpression of a cross reference from a 4xx or 5xx tracing.
	a	Reference not displayed
	b	Reference not displayed, field 664 used
	c	Reference not displayed, field 663 used
	d	Reference not displayed, field 665 used
	n	Not applicable

7xx fields. Control subfield ‡w in the 7xx fields contains two character positions designated as ‡w/0 and ‡w/1.

Field w/0 controls the generation of a link display from a 700–785 field. Use subfield ‡w to suppress the display. The table below shows the values for Subfield ‡w/0.

Position	Code	Description
1		Link Display Code • Controls the surpression of a link display.
	a	Link not displayed
	b	Link not displayed, field 788 used
	c	Link not displayed, non-7xx field used
	n	Not applicable

Field w/1indicates whether heading replacement requires review. The table below shows the values for Subfield ‡w/1.

Position	Code	Description
1		Replacement Complexity Code • Indicates whether heading replacement requires review.
	a	Heading replacement does not require review
	b	Heading replacement requires review
	n	Not applicable

C.5 Variable Field Definitions

The table below lists variable fields defined for authority records. Not all fields and/or subfields appear in records distributed by LC. Throughout this table, R = repeatable tag and NR = nonrepeatable tag.

For additional information, see:

MARC 21 Concise Format for Authority data at < http://www.loc.gov/marc/authority/ >
Library of Congress Authorities at < http://authorities.loc.gov/ >

Thesauri. 7xx headings are derived from a number of sources, including but not limited to:

Medical Subject Headings at < http://www.nlm.nih.gov/mesh/2002/MBrowser.html >
National Agricultural Library Subject Authority File (see the NAL Agricultural Thesaurus at < http://agclass.nal.usda.gov/agt/agt.htm > )
Amicus — Canadian National Catalog (see information at: < http://www.nlc-bnc.ca./amicus/ >)
Répertoire de vedettes-matière (see information at: < http://www.nlc-bc.ca/8/19 >)

Tag	Ind 1	Ind 2	Subfield	Name	Comment
005				Date and Time of Latest Transaction (NR)	Date of last update
				Undefined
			‡a	Date and time of latest transaction (NR)
010				Library of Congress Control Number (NR)	Indexed for searching; also called LCCN
				Undefined	Indexed for searching; also called LCCN
			‡a	LC control number (NR)
			‡z	Canceled/invalid LC control number (R)
014				Link to Bibliographic Record for Serial or Multipart Item (R)	The number is preceded by the MARC Organization Code (in parentheses) of the agency that created the bibliographic record
				Undefined
			‡a	Control number of related bibliographic record (NR)
016				National Bibliographic Agency Control Number (R)
				National Library of Canada
	7			Agency identified in subfield ‡2
				Undefined
			‡a	Record control number (NR)
			‡z	Canceled/invalid record control number (R)
			‡2	Source (NR)
020				International Standard Book Number (ISBN) (R)	Contains the ISBN for a multipart item that is cataloged as a set.
				Undefined
			‡a	ISBN (NR)
			‡c	Terms of availability (NR)
			‡z	Canceled/invalid ISBN (R)
022				International Standard Serial Number (ISSN) (R)	Contains the ISSN associated with a series heading.
				Undefined
			‡a	ISSN (NR)
			‡y	Incorrect ISSN
			‡z	Canceled/invalid ISSN (R)
035				System Control Number (R)	The number is preceded by the agency's MARC Organization Code (in parentheses)
				Undefined
			‡a	System control number (NR)
			‡z	Canceled/invalid control number (R)
040				Cataloging Source (NR)	Identifies agencies that provided, transcribed, or modified the data for the record. Agencies are represented by MARC Organization Codes.
				Undefined
			‡a	Original cataloging agency (NR)
			‡b	Language of cataloging (NR)
			‡c	Transcribing agency (NR)
			‡d	Modifying agency (R)
			‡e*	Description conventions
			‡f*	Subject heading/thesaurus conventions
042*				Authentication Code (NR)	Contains one or more authentication codes assigned by centers that review and upgrade an authority record.
				Undefined
			‡a	Authentication code (R)
043*				Geographic Area Code (NR)	Contains a code assigned from the MARC code list for geographic areas if a geographic area is associated with the record.
				Undefined
			‡a	Geographic area code (R)
			‡b	Local GAC code (R)
			‡2	Source of local code (R)
045*				Time Period of Heading (NR)	Contains a time period (subfield ‡a) and/or a formatted time period associated with a 15x or a 18x heading.
				Subfield ‡b or ‡c not present
	0			Single date/time
	1			Multiple single dates/times
	2			Range of dates/times
				Undefined
			‡a	Time period of heading (R)
			‡b	Formatted 9999 B.C. through C.E. time period (R)
			‡c	Formatted pre-9999 B.C. time period (R)
050				Library of Congress Call Number (R)	Contains the LC call number of a series if LC has classified all or part of the series as a set. May contain call numbers that do not follow the LC classification schedules (e.g., LAW). LC has not implemented the second indicator values.
				Undefined
		**		Undefined
		0		Assigned by LC
		4		Assigned by agency other than LC
			‡a	Classification number (NR)
			‡b	Item number (NR)
			‡d	Volumes/dates to which call number applies (NR)
			‡5	Institution to which field applies (R)
052*				Geographic Classification Code (R)
				Library of Congress Classification
				Undefined
			‡a	Geographic classification area code (NR)
			‡b	Geographic classification subarea code (R)
053				LC Classification Number (R)	Contains one or more LC class numbers, or a range of numbers, associated with the heading, plus any explanatory terms.
				Undefined
		0		Assigned by LC
		4		Assigned by agency other than LC
			‡a	Classification number element–single number or beginning number of a span (NR)
			‡b	Classification number element–ending number of a span (NR)
			‡c	Explanatory term (NR)
			‡5	Institution to which field applies (R)
055*				National Library of Canada Call Number (R)
				Undefined
		0		Assigned by NLC
		4		Assigned by agency other than NLC
			‡a	Classification number (NR)
			‡b	Item number (NR)
			‡d	Volumes/dates to which call number applies (NR)
			‡5	Institution to which field applies (R)
060*				National Library of Medicine Call Number (R)
				Undefined
		0		Assigned by NLM
		4		Assigned by agency other than NLM
			‡a	Classification number (NR)
			‡b	Item number (NR)
			‡d	Volumes/dates to which call number applies (NR)
			‡5	Institution to which field applies (R)
065				Other Classification number (R)
				Undefined
			‡a	Assigned by agency other than LC
			‡b	Classification number element–single number or beginning number of a span (NR)
			‡c	Classification number element–ending number of a span (NR)
			‡2	Number source (NR)
			‡5	Institution to which field applies (R)
070*				National Agricultural Library Call Number (R)
				Undefined
			‡a	Classification number (NR)
			‡b	Item number (NR)
			‡d	Volumes/dates to which call number applies (NR)
072*				Subject Category Code (R)
				Undefined
				No information provided
		0		NAL subject category code list
		7		Code source specified in subfield ‡2
			‡a	Subject category code (NR)
			‡x	Subject category code subdivision (R)
			‡2	Code source (NR)
073*				Subdivision Usage (NR)
				Undefined
			‡a	Subdivision usage (R)
			‡z	Source (NR)
082				Dewey Decimal Call Number (R)
	0			Full
	1			Abridged
				No information provided
		0		Assigned by LC
		4		Assigned by agency other than LC
			‡a	Classification number (NR)
			‡b	Item number (NR)
			‡d	Volumes/dates to which call number applies (NR)
			‡2	Edition number (NR)
			‡5	Institution to which field applies (R)
083				Dewey Decimal Classification Number (R)	Contains one or more Dewey class numbers, or a range of numbers, associated with the authority heading and any explanatory terms.
	0			Full
	1			Abridged
		0		Assigned by LC
		4		Assigned by agency other than LC
			‡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)
			‡z	Table identification–table number (NR)
			‡2	Edition number (NR)
			‡5	Institution to which field applies (R)
086*				Government Document Call Number (R)
				Source specified in subfield ‡2
	0			Superintendent of Documents Classification System
	1			Government of Canada Publications: Outline of Classification
				Undefined
			‡a	Call number (NR)
			‡d	Volumes/dates to which call number applies (NR)
			‡z	Canceled/invalid call number (R)
			‡2	Number source (NR)
			‡5	Institution to which field applies (R)
087				Government Document Classification Number (R)
				Source specified in subfield ‡2
	0			Superintendent of Documents Classification System
	1			Government of Canada Publications: Outline of Classification
				Undefined
			‡a	Classification number element–single number or beginning number of span (NR)
			‡b	Classification number element–ending number of span (NR)
			‡c	Explanatory information (R)
			‡2	Number source (NR)
090				Local Call Number (Obsolete)
				Undefined
			‡a	Classification number (NR)
			‡b	Item number (NR)
			‡d	Volumes/dates to which call number applies (NR)
098				Other Classification Schemes (R) Note: OCLC defined.	Field is not retained in master record
	0–9			OCLC defined
		0–9		OCLC defined
			‡a	Call number based on other classification scheme (NR)
			‡e	Feature heading (NR)
			‡f	Filing suffix (NR)
099				Local Free-Text Call Number (R) Note: OCLC defined.	Field is not retained in master record
				Undefined
		0		Library of Congress classification scheme
		1		Dewey Decimal Classification scheme
		9		Local classification scheme
			‡a	Classification number (NR)
			‡e	Feature heading (NR)
			‡f	Filing suffix (NR)
100				Heading–Personal Name (NR)	Contains a personal name heading established according to AACR2, AACR1, or earlier cataloging rules
	0			Forename
	1			Surname
	3*			Family name
				Undefined
			‡a	Personal name (NR)
			‡b	Numeration (NR)
			‡c	Titles and other words associated with a name (R)
			‡d	Dates associated with a name (NR)
			‡e*	Relator term (R)
			‡f	Date of a work (NR)
			‡g*	Miscellaneous information (NR)
			‡j*	Attribution qualifier (R)
			‡k	Form subheading (R)
			‡l	Language of a work (NR)
			‡m	Medium of performance for music (R)
			‡n	Number of part/section of a work (R)
			‡o	Arranged statement for music (NR)
			‡p	Name of part/section of a work (R)
			‡q	Fuller form of name (NR)
			‡r	Key for music (NR)
			‡s	Version (NR)
			‡t	Title of a work (NR)
			‡v	Form subdivision (R)
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
110				Heading–Corporate Name (NR)	Contains a corporate name heading established according to AACR2, AACR1, or earlier cataloging rules
	0			Inverted name
	1			Jurisdiction name
	2			Name in direct order
				Undefined
			‡a	Corporate name or jurisdiction name as entry element (NR)
			‡b	Subordinate unit (R)
			‡c	Location of meeting (NR)
			‡d	Date of meeting or treaty signing (R)
			‡e*	Relator term (R)
			‡f	Date of a work (NR)
			‡g	Miscellaneous information (NR)
			‡k	Form subheading (R)
			‡l	Language of a work (NR)
			‡m	Medium of performance for music (R)
			‡n	Number of part/section/meeting (R)
			‡o	Arranged statement for music (NR)
			‡p	Name of part/section of a work (R)
			‡r	Key for music (NR)
			‡s	Version (NR)
			‡t	Title of a work (NR)
			‡v	Form subdivision (R)
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
111				Heading–Meeting Name (NR)	Contains a conference or meeting name heading established according to AACR2, AACR1, or earlier cataloguing rules. Formerly, meeting numbers appeared in subfield ‡b, not ‡n. In 1980, subfield ‡b was made obsolete, but pre-1980 records could contain this subfield code.
	0			Inverted name
	1			Jurisdiction name
	2			Name in direct order
				Undefined
			‡a	Meeting name or jurisdiction name as entry element (NR)
			‡c	Location of meeting (NR)
			‡d	Date of meeting (NR)
			‡e	Subordinate unit (R)
			‡f	Date of a work (NR)
			‡g	Miscellaneous information (NR)
			‡k	Form subheading (R)
			‡l	Language of a work (NR)
			‡n	Number of part/section/meeting (R)
			‡p	Name of part/section of a work (R)
			‡q	Name of meeting following jurisdiction name entry element (NR)
			‡s	Version (NR)
			‡t	Title of a work (NR)
			‡v	Form subdivision (R)
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
130				Heading–Uniform Title (NR)	Contains an established uniform title heading
				Undefined	Contains an established uniform title heading
		0		Number of nonfiling characters present
			‡a	Uniform title (NR)
			‡d	Date of treaty signing (R)
			‡f	Date of a work (NR)
			‡g	Miscellaneous information (NR)
			‡k	Form subheading (R)
			‡l	Language of a work (NR)
			‡m	Medium of performance for music (R)
			‡n	Number of part/section of a work (R)
			‡o	Arranged statement for music (NR)
			‡p	Name of part/section of a work (R)
			‡r	Key for music (NR)
			‡s	Version (NR)
			‡t	Title of a work (NR)
			‡v	Form subdivision (R)
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
150*				Heading–Topical Term (NR)	Contains a topical subject heading
				Undefined	Contains a topical subject heading
			‡a	Topical term or geographic name entry element (NR)
			‡b	Topical term following geographic name entry element (NR)
			‡v	Form subdivision (R)
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
151				Heading–Geographic Name (NR)	Contains a geographic name or subject heading. Records created before subfield ‡b became obsolete in 1987 may contain a jurisdiction name in an x51 field followed by a subfield ‡b containing a city section name.
				Undefined
			‡a	Geographic name (NR)
			‡v	Form subdivision (R)
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
155*				Heading–Genre/Form Term (NR)	Identifies the subelements occurring in genre/form term headings constructed according to generally accepted thesaurus-building conventions (e.g., Art & Architecture Thesaurus).
				Undefined
			‡a	Genre/form term (NR)
			‡v	Form subdivision (R)
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
180*				Heading–General Subdivision (NR)	A topical or language term used as a heading in a subdivision record
				Undefined
			‡v	Form subdivision (R)
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
181*				Heading–Geographic Subdivision (NR)	A geographic name or term used as a heading in a subdivision record
				Undefined
			‡v	Form subdivision (R)
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
182*				Heading–Chronological Subdivision (NR)	A chronological term used as a heading in a subdivision record
				Undefined
			‡v	Form subdivision (R)
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
185*				Heading–Form Subdivision (NR)	A form or genre term used as a heading in a subdivision record
				Undefined
			‡v	Form subdivision (R)
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
260*				*Complex See* Reference–Subject (R)**	Used in a reference record. Field 260 contains the established form referred to and explanatory text. An unestablished form of the subject referred from is given in the 1xx field
				Undefined
			‡a	Heading referred to (R)
			‡i	Explanatory text (R)
360*				Complex See Also Reference–Subject (R)	The established form of the heading referred from is given in the 1xx field. Field 360 contains the form of the heading referred to and explanatory text.
				Undefined
			‡a	Heading referred to (R)
			‡i	Explanatory text (R)
400				See From Tracing–Personal Name (R)	Contains the tracing for the form of personal name referred from.
	0			Forename
	1			Surname
	3			Family name
				Undefined
			‡a	Personal name (NR)
			‡b	Numeration (NR)
			‡c	Titles and other words associated with a name (R)
			‡d	Dates associated with a name (NR)
			‡e*	Relator term (R)
			‡f	Date of a work (NR)
			‡g*	Miscellaneous information (NR)
			‡j*	Attribution qualifier (R)
			‡k	Form subheading (R)
			‡l	Language of a work (NR)
			‡m	Medium of performance for music (R)
			‡n	Number of part/section of a work (R)
			‡o	Arranged statement for music (NR)
			‡p	Name of part/section of a work (R)
			‡q	Fuller form of name (NR)
			‡r	Key for music (NR)
			‡s	Version (R)
			‡t	Title of a work (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details.
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies (R)
410				See From Tracing–Corporate Name (R)	Contains the tracing for the form of corporate name referred from.
	0			Inverted name
	1			Jurisdiction name
	2			Name in direct order
				Undefined
			‡a	Corporate name or jurisdiction name as entry element (NR)
			‡b	Subordinate unit (R)
			‡c	Location of meeting (NR)
			‡d	Date of meeting or treaty signing (R)
			‡e*	Relator term (R)
			‡f	Date of a work (NR)
			‡g	Miscellaneous information (NR)
			‡k	Form subheading (R)
			‡l	Language of a work (NR)
			‡m	Medium of performance for music (R)
			‡n	Number of part/section/meeting (R)
			‡o	Arranged statement for music (NR)
			‡p	Name of part/section of a work (R)
			‡r	Key for music (NR)
			‡s	Version (NR)
			‡t	Title of a work (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)
				/0 Special relationship	See page C:13 table for details
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies (R)
411				See From Tracing–Meeting Name (R)	Contains the tracing for the form of conference or meeting name referred from. Formerly, meeting numbers appeared in subfield ‡b, not ‡n. In 1980, subfield ‡b was made obsolete, but pre-1980 records could contain this subfield code.
	0			Inverted name
	1			Jurisdiction name
	2			Name in direct order
				Undefined
			‡a	Meeting name or jurisdiction name as entry element (NR)
			‡c	Location of meeting (NR)
			‡d	Date of meeting (NR)
			‡e	Subordinate unit (R)
			‡f	Date of a work (NR)
			‡g	Miscellaneous information (NR)
			‡k	Form subheading (R)
			‡l	Language of a work (NR)
			‡n	Number of part/section/meeting (R)
			‡p	Name of part/section of a work (R)
			‡q	Name of meeting following jurisdiction name entry element (NR)
			‡s	Version (NR)
			‡t	Title of a work (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies
430				See From Tracing–Uniform Title (R)	Contains the tracing for the form of uniform title referred from
				Undefined
		0		Number of nonfiling characters present
			‡a	Uniform title (NR)
			‡d	Date of treaty signing (R)
			‡f	Date of a work (NR)
			‡g	Miscellaneous information (NR)
			‡k	Form subheading (R)
			‡l	Language of a work (NR)
			‡m	Medium of performance for music (R)
			‡n	Number of part/section of a work (R)
			‡o	Arranged statement for music (NR)
			‡p	Name of part/section of a work (R)
			‡r	Key for music (NR)
			‡s	Version (NR)
			‡t	Title of a work (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies (R)
450*				See From Tracing–Topical Term (R)	Contains the topical term tracing for the form of heading referred from
				Undefined
			‡a	Topical term or geographic name as entry element (NR)
			‡b	Topical term following geographic name as entry element (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5	Institution to which field applies (R)
451				See From Tracing–Geographic Name (R)	Contains the tracing for the form of geographic name or subject referred from. Records created before subfield ‡b became obsolete in 1987 may contain a jurisdiction name in an x51 field followed by a subfield ‡b containing a city section name
				Undefined
			‡a	Geographic name (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies (R)
455				See From Tracing–Genre/Form Term (R)	Used in an established heading or established heading and subdivision record to trace a see from reference from a genre/form term not used in an established heading
				Undefined
			‡a	Genre/form term (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies (R)
480				See From Tracing–General Subdivision (R)	Used in an established heading or established heading and subdivision record to trace a see from reference from a general subdivision not used in an established heading
				Undefined
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies (R)
481				See From Tracing–Geographic Subdivision (R)	Used in an established heading or established heading and subdivision record to trace a see from reference from a geographic subdivision not used in an established heading
				Undefined
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies (R)
482				See From Tracing–Chronological Subdivision (R)	Used in an established heading or established heading and subdivision record to trace a see from reference from a chronological subdivision not used in an established heading
				Undefined
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies (R)
485				See From Tracing–Form Subdivision (R)	Used in an established heading or established heading and subdivision record to trace a see from reference from a form subdivision not used in an established heading
				Undefined
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies (R)
500				See Also From Tracing–Personal Name (R)	Contains the tracing for a personal name that is in some way related to the established heading
	0			Forename
	1			Surname
	3			Family name
				Undefined
			‡a	Personal name (NR)
			‡b	Numeration (NR)
			‡c	Titles and other words associated with a name (R)
			‡d	Dates associated with a name (NR)
			‡e*	Relator term (R)
			‡f	Date of a work (NR)
			‡g*	Miscellaneous information (NR)
			‡j*	Attribution qualifier (R)
			‡k	Form subheading (R)
			‡l	Language of a work (NR)
			‡m	Medium of performance for music (R)
			‡n	Number of part/section of a work (R)
			‡o	Arranged statement for music (NR)
			‡p	Name of part/section of a work (R)
			‡q	Fuller form of name (NR)
			‡r	Key for music (NR)
			‡s	Version (NR)
			‡t	Title of a work (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies (R)
510				See Also From Tracing–Corporate Name (R)	Contains the tracing for a corporate name that is in some way related to the established heading
	0			Inverted name
	1			Jurisdiction name
	2			Name in direct order
				Undefined
			‡a	Corporate name or jurisdiction name as entry element (NR)
			‡b	Subordinate unit (R)
			‡c	Location of meeting (NR)
			‡d	Date of meeting or treaty signing (R)
			‡e*	Relator term (R)
			‡f	Date of a work (NR)
			‡g	Miscellaneous information (NR)
			‡k	Form subheading (R)
			‡l	Language of a work (NR)
			‡m	Medium of performance for music (R)
			‡n	Number of part/section/meeting (R)
			‡o	Arranged statement for music (NR)
			‡p	Name of part/section of a work (R)
			‡r	Key for music (NR)
			‡s	Version (NR)
			‡t	Title of a work (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies (R)
511				See Also From Tracing–Meeting Name (R)	Contains the tracing for a conference or meeting name that is in some way related to the established heading.
	0			Inverted name
	1			Jurisdiction name
	2			Name in direct order
				Undefined
			‡a	Meeting name or jurisdiction name as entry element (NR)
			‡c	Location of meeting (NR)
			‡d	Date of meeting (NR)
			‡e	Subordinate unit (R)
			‡f	Date of a work (NR)
			‡g	Miscellaneous information (NR)
			‡k	Form subheading (R)
			‡l	Language of a work (NR)
			‡n	Number of part/section of a work (R)
			‡p	Name of part/section of a work (R)
			‡q	Name of meeting following jurisdiction name entry element (NR)
			‡s	Version (NR)
			‡t	Title of a work (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies (R)
530				See Also From Tracing–Uniform Title (R)	Contains the tracing for a uniform title that is in some way related to the established heading
				Undefined
		0		Number of nonfiling characters present
			‡a	Uniform title (NR)
			‡d	Date of treaty signing (R)
			‡f	Date of a work (NR)
			‡g	Miscellaneous information (NR)
			‡k	Form subheading (R)
			‡l	Language of a work (NR)
			‡m	Medium of performance for music (R)
			‡n	Number of part/section of a work (R)
			‡o	Arranged statement for music (NR)
			‡p	Name of part/section of a work (R)
			‡r	Key for music (NR)
			‡s	Version (NR)
			‡t	Title of a work (NR)
			‡v	Form subdivision (R)
			‡w	/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies (R)
550*				See Also From Tracing–Topical Term (R)	Contains the tracing for a topical term that is in some way related to the established heading
				Undefined
			‡a	Topical term or geographic name as entry element (NR)
			‡b	Topical term following geographic name as entry element (NR)
			‡i	Reference instruction phrase (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5	Institution to which field applies (R)
551				See Also From Tracing–Geographic Name (R)	Contains the tracing for a geographic name/subject that is in some way related to the established heading
				Undefined
			‡a	Geographic name (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies (R)
555*				See Also From Tracing–Genre/Form Term (R)	Used in an established heading or established heading and subdivision record to trace a see also from reference from a geographic name to a related subject heading
				Undefined
			‡a	Genre/form term (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5	Institution to which field applies (R)
580*				See Also From Tracing–General Subdivision (R)	Used in an established heading or established heading and subdivision record to trace a see also from reference from a general subdivision to a related established heading
				Undefined
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies (R)
581*				See Also From Tracing–Geographic Subdivision (R)	Used in an established heading or established heading and subdivision record to trace a see also from reference from a geographic subdivision to a related established heading
				Undefined
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5*	Institution to which field applies (R)
582*				See Also From Tracing–Chronological Subdivision (R)	Used in an established heading or established heading and subdivision record to trace a see also from reference from a chronological subdivision to a related established heading
				Undefined
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5	Institution to which field applies (R)
585*				See Also From Tracing–Form Subdivision (R)	Used in an established heading or established heading and subdivision record to trace a see also from reference from a form subdivision to a related established heading
				Undefined
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See page C:13 table for details
				/0 Special relationship
				/1 Tracing use restriction
				/2 Earlier form of heading
				/3 Reference display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡5	Institution to which field applies (R)
640				Series Dates of Publication and/or Volume Designation (R)	Contains the beginning/ending dates of series publication and/or series volume designation. This field is used to differentiate series with the same or similar titles
	0			Formatted style
	1			Unformatted style
				Undefined
			‡a	Dates of publication and/or sequential designation (NR)
			‡z	Source of information (NR)
641				Series Numbering Peculiarities (R)	Contains notes about coverage during the reporting year or irregularities in numbering, e.g., double numbering, combined issues, suspension of publication
				Undefined
			‡a	Numbering peculiarities note (NR)
			‡z	Source of information (NR)
642				Series Numbering Example (R)	Contains an example of the form of series numbering that should be used in subfield ‡v of series added entry fields in bibliographic records for individual issues of the series
				Undefined
			‡a	Series numbering example (NR)
			‡d	Volumes/dates to which series numbering example applies (NR)
			‡5	Institution/copy to which field applies (R)
643				Series Place and Publisher/Issuing Body (R)	Contains series' place of publication, publisher or issuing body, and volumes or dates to which this information applies
				Undefined
			‡a	Place (R)
			‡b	Publisher/issuing body (R)
			‡d	Volumes/dates to which place and publisher/issuing body apply (NR)
644				Series Analysis Practice (R)	Indicates a specific organization's analysis practice for a series named in the 1xx field of an established heading record for a series.
				Undefined
			‡a	Series analysis practice (NR)
				f Analyzed in full
				p Analyzed in part
				n Not analyzed
			‡b	Exceptions to analysis practice (NR)
			‡d	Volumes/dates to which analysis practice applies (NR)
			‡5	Institution/copy to which field applies (R)
645				Series Tracing Practice (R)	Indicates a specific organization's tracing practice for a series named in the 1xx field of an established heading record for a series.
				Undefined
			‡a	Series tracing practice (NR)
				t Traced as series added entry
				n Not traced as series added entry
			‡d	Volumes/dates to which tracing practice applies (NR)
			‡5	Institution/copy to which field applies (R)
646				Series Classification Practice (R)	Indicates a specific organization's classification practice for a series named in the 1xx field of an established heading record for a series.
				Undefined
			‡a	Series classification practice (NR)
				m Volumes are classified with main or other series
				c Volumes are classified as a collection
				s Volumes are classified separately
			‡d	Volumes/dates to which classification practice applies (NR)
			‡5	Institution/copy to which field applies (R)
663				*Complex See Also* Reference–Name (NR)**	Contains a see also reference prepared by the cataloger when the reference is more complex than can be conveyed solely through the contents of one or more 5xx fields
				Undefined
			‡a	Explanatory text (R)
			‡b	Heading referred to (R)
			‡t	Title referred to (R)
664				*Complex See* Reference–Name (NR)**	Contains a see reference prepared by the cataloger when the reference is more complex than can be conveyed solely through the contents of one or more 4xx fields
				Undefined
			‡a	Explanatory text (R)
			‡b	Heading referred to (R)
			‡t	Title referred to (R)
665*				History Reference (NR)	Historical information, usually about a corporate body. (As of 1981 February, LC no longer includes these notes and removes them if the record needs to be updated.)
				Undefined
			‡a	History reference (R)
666				General Explanatory Reference–Name (NR)	Used in a reference record, field 666 contains information relating to searching and filing arrangement. Very rarely used
				Undefined
			‡a	General explanatory reference (R)
667				Nonpublic General Note (R)	Used in records being updated. Also used to give scope of heading to the cataloger
				Undefined
			‡a	Nonpublic general note (NR)
			‡5*	Institution to which field applies (R)
670				Source Data Found (R)	Citation of source in which information about the heading was found
				Undefined
			‡a	Source citation (NR)
			‡b	Information found (NR)
			‡u	Uniform Resource Identifier (R)
675				Source Data Not Found (NR)	Reference sources that provided no information about the heading
				Undefined
			‡a	Source citation (R)
678*				Biographical or Historical Data (R)	A summary of the essential biographical, historical, or other information about the 1xx heading in an established heading record, an established heading and subdivision record, or a subdivision record
				No information provided
	0			Biographical sketch
	1			Administrative history
				Undefined
			‡a	Biographical or historical data (R)
			‡b	Expansion (NR)
680*				Public General Note (R)	Statement indicating the usage of a subject heading usually referring to related or overlapping headings
				Undefined
			‡a	Heading or subdivision term (R)
			‡i	Explanatory text (R)
			‡5	Institution to which field applies (R)
681*				Subject Example Tracing Note (R)	Serves in Record 1 as a tracing for another record (Record 2) in which the heading in Record 1 appears as an example in a complex see or see also reference (260 or 360) or in a scope note (680)
				Undefined
			‡a	Subject heading or subdivision term (R)
			‡i	Explanatory text (R)
682*				Subject Example Tracing Note	Explains why a heading has been deleted from an authority file. May contain replacement heading(s). Only appropriate when Leader/05 (Rec Stat) contains code d (Deleted (other)).

			‡a	Replacement heading (R)
			‡i	Explanatory text (R)
688*				Application History Note (R)	Contains information that documents changes in the application of the 1xx field
				Undefined
			‡a	Application history note (NR)
			‡5	Institution to which field applies (R)
690				Local Note (R) Note: OCLC defined.	Field not retained in the master record
				Undefined
			‡a	Local note (NR)
700				Established Heading Linking Entry–Personal Name (R)	Contains a personal name that is equivalent to the name contained in the 100 field of the same record. It links headings within a system or from different thesauri or authority files
	0			Forename
	1			Single surname
	3			Family name
		0		Library of Congress Subject Headings/Name Authority file
		1		LC subject headings for children's literature
		2		Medical Subject Headings/NLM authority file
		3		National Agricultural Library subject authority file
		4		Source not specified
		5		Canadian Subject Headings/NLC authority file
		6		Répertoire des vedettes-matière
		7		Source specified in subfield ‡2
			‡a	Personal name (NR)
			‡b	Numeration (NR)
			‡c	Titles and other words associated with a name (R)
			‡d	Dates associated with a name (NR)
			‡e	Relator term (R)
			‡f	Date of a work (NR)
			‡g	Miscellaneous information (NR)
			‡h	Medium (NR)
			‡j	Attribution qualifier (R)
			‡k	Form subheading (R)
			‡l	Language of a work (NR)
			‡m	Medium of performance for music (R)
			‡n	Number of part/section of a work (R)
			‡o	Arranged statement for music (NR)
			‡p	Name of part/section of a work (R)
			‡q	Fuller form of name (NR)
			‡r	Key for music (NR)
			‡s	Version (NR)
			‡t	Title of a work (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See table page C:14 for coding instructions
				/0 Link display	See table page C:14 for coding instructions
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡0	Record control number (R)
			‡2	Source of heading or term (R)
			‡5	Institution to which field applies (R)
710				Established Heading Linking Entry–Corporate Name (R)	Contains a corporate name that is equivalent to the name contained in the 110 field of the same record. It links headings within a system or from different thesauri or authority files
	0			Inverted name
	1			Jurisdiction name
	2			Name in direct order
		0		Library of Congress Subject Headings/Name Authority file
		1		LC subject headings for children's literature
		2		Medical Subject Headings/NLM authority file
		3		National Agricultural Library subject authority file
		4		Source not specified
		5		Canadian Subject Headings/NLC authority file
		6		Répertoire des vedettes-matière
		7		Source specified in subfield ‡2
			‡a	Corporate name or jurisdiction name as entry element (NR)
			‡b	Subordinate unit (R)
			‡c	Location of meeting (NR)
			‡d	Date of meeting or treaty signing (R)
			‡e	Relator term (R)
			‡f	Date of a work (NR)
			‡g	Miscellaneous information (NR)
			‡h	Medium (NR)
			‡k	Form subheading (R)
			‡l	Language of a work (NR)
			‡m	Medium of performance for music (R)
			‡n	Number of part/section/meeting (R)
			‡o	Arrangement statement for music (NR)
			‡p	Name of part/section of a work (R)
			‡r	Key for music (NR)
			‡s	Version (NR)
			‡t	Title of a work (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See table page C:14 for coding instructions
				/0 Link display	See table page C:14 for coding instructions
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡0	Record control number (R)
			‡2	Source of heading or term (NR)
			‡5	Institution to which field applies (R)
711				Established Heading Linking Entry–Meeting Name (R)	Contains a meeting name that is equivalent to the name contained in the 111 field of the same record. It links headings within a system or from different thesauri or authority files
	0			Inverted name
	1			Jurisdiction name
	2			Name in direct order
		0		Library of Congress Subject Headings/Name Authority file
		1		LC subject headings for children's literature
		2		Medical Subject Headings/NLM authority file
		3		National Agricultural Library subject authority file
		4		Source not specified
		5		Canadian Subject Headings/NLC authority file
		6		Répertoire des vedettes-matière
		7		Source specified in subfield ‡2
			‡a	Meeting name or jurisdiction name as entry element (NR)
			‡c	Location of meeting (NR)
			‡d	Date of meeting (NR)
			‡e	Subordinate unit (R)
			‡f	Date of a work (NR)
			‡g	Miscellaneous information (NR)
			‡h	Medium (NR)
			‡k	Form subheading (R)
			‡l	Language of a work (NR)
			‡n	Number of part/section/meeting (R)
			‡p	Name of part/section of a work (R)
			‡q	Name of meeting following jurisdiction name entry element (NR)
			‡s	Version (NR)
			‡t	Title of a work (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See table page C:14 for coding instructions
				/0 Link display
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡0	Record control number (R)
			‡2	Source of heading or term (NR)
			‡5	Institution to which field applies (NR)
730				Established Heading Linking Entry–Uniform Title (R)	Contains a uniform title that is equivalent to the title contained in the 130 field of the same record. It links equivalent headings within a system or from different thesauri or authority files
				Undefined
		0		Library of Congress Subject Headings/Name authority file
		1		LC subject headings for children's literature
		2		Medical Subject Headings/NLM authority file
		3		National Agricultural Library subject authority file
		4		Source not specified
		5		Canadian Subject Headings/NLC authority file
		6		Répertoire des vedettes-matière
		7		Source specified in subfield ‡2
			‡a	Uniform title (NR)
			‡d	Date of treaty signing (R)
			‡f	Date of a work (NR)
			‡g	Miscellaneous information (NR)
			‡h	Medium (NR)
			‡k	Form subheading (R)
			‡l	Language of a work (NR)
			‡m	Medium of performance for music (R)
			‡n	Number of part/section of a work (R)
			‡o	Arranged statement for music (NR)
			‡p	Name of part/section of a work (R)
			‡r	Key for music (NR)
			‡s	Version (NR)
			‡t	Title of a work (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See table page C:14 for coding instructions
				/0 Link display	See table page C:14 for coding instructions
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡0	Record control number (R)
			‡2	Source of heading or term (NR)
			‡5	Institution to which field applies (R)
748				Established Heading Linking Entry–Chronological Term (R)	Contains a chronological term that is equivalent to the 148 chronological term or 182 chronological subdivision heading field of the same record. It links headings within a system or from different thesauri or authority files
				Undefined
		0		Library of Congress Subject Headings/Name authority file
		1		LC subject headings for children's literature
		2		Medical Subject Headings/NLM authority file
		3		National Agricultural Library subject authority file
		4		Source not specified
		5		Canadian Subject Headings/NLC authority file
		6		Répertoire des vedettes-matière
		7		Source specified in subfield ‡2
			‡a	Chronological term (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See table page C:14 for coding instructions
				/0 Link display	See table page C:14 for coding instructions
				/1 Replacement complexity	See table page C:14 for coding instructions
			‡x	General subdivision (R)	See table page C:14 for coding instructions
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡0	Record control number (R)
			‡2	Source of heading or term (NR)
			‡5	Institution to which field applies (R)
750*				Established Heading Linking Entry–Topical Term (R)	Contains a topical term that is equivalent to the 150 topical term or 180 general subdivision heading field of the same record. It links headings within a system or from different thesauri or authority files
				Undefined
		0		Library of Congress Subject Headings/Name authority file
		1		LC subject headings for children's literature
		2		Medical Subject Headings/NLM authority file
		3		National Agricultural Library subject authority file
		4		Source not specified
		5		Canadian Subject Headings/NCL name authority file
		6		Répertoire des vedettes-matière
		7		Source specified in subfield ‡2
			‡a	Topical term or geographic name as entry element (NR)
			‡b	Topical term following geographic name as entry element (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See table page C:14 for coding instructions
				/0 Link display	See table page C:14 for coding instructions
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡0	Record control number (R)
			‡2	Source of heading or term (NR)
			‡5	Institution to which field applies (R)
751				Established Heading Linking Entry–Geographic Name (R)	Contains a geographic name that is equivalent to the 151 geographic name or 181 geographic subdivision field of the same record. It links headings within a system or from different thesauri or authority files
				Undefined
		0		Library of Congress Subject Headings/Name authority file
		1		LC subject headings for children's literature
		2		Medical Subject Headings/NLM authority file
		3		National Agricultural Library subject authority file
		4		Source not specified
		5		Canadian Subject Headings/NLC authority file
		6		Répertoire des vedettes-matière
		7		Source specified in subfield ‡2
			‡a	Geographic name (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See table page C:14 for coding instructions
				/0 Link display	See table page C:14 for coding instructions
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡0	Record control number (R)
			‡2	Source of heading or term (NR)
			‡5	Institution to which field applies (NR)
			‡8	Linking number (NR)

755*				Established Heading Linking Entry–Genre/Form Term (R)	Contains a genre/form term that is equivalent to the 155 genre/form term or 185 form subdivision heading field of the same record. It links headings within a system or from different thesauri or authority files
				Undefined
		0		Library of Congress Subject Headings/Name authority file
		1		LC subject headings for children's literature
		2		Medical Subject Headings/NLM authority file
		3		National Agricultural Library subject authority file
		4		Source not specified
		5		Canadian Subject Headings/NLC authority file
		6		Répertoire des vedettes-matière
		7		Source specified in subfield ‡2
			‡a	Genre/form term as entry element (NR)
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See table page C:14 for coding instructions
				/0 Link display	See table page C:14 for coding instructions
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡0	Record control number (R)
			‡2	Source of heading or term (NR)
			‡5	Institution to which field applies (NR)
780*				Subdivision Heading Linking Entry–General Subdivision (R)	Contains a general subdivision term that is equivalent to the 150 topical term or 180 general subdivision field of the same record. It links headings within a system or from different thesauri or authority files
				Undefined
		0		Library of Congress Subject Headings/Name authority file
		1		LC subject headings for children's literature
		2		Medical Subject Headings/NLM authority file
		3		National Agricultural Library subject authority file
		4		Source not specified
		5		Canadian Subject Headings/NLC authority file
		6		Répertoire des vedettes-matière
		7		Source specified in subfield ‡2
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See table page C:14 for coding instructions
				/0 Link display	See table page C:14 for coding instructions
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡0	Record control number (R)
			‡2	Source of heading or term (NR)
			‡5	Institution to which field applies (R)
781				Subdivision Heading Linking Entry–Geographic Subdivision (R)	Contains a geographic subdivision name that is equivalent to the 151 geographic name or 181 geographic subdivision field of the same record. It links headings within a system or from different thesauri or authority files
				Undefined
		0		Library of Congress Subject Headings/Name Authority file
		1		LC subject headings for children's literature
		2		Medical Subject Headings/NLM authority file
		3		National Agricultural Library subject authority file
		4		Source not specified
		5		Canadian Subject Headings/NLC authority file
		6		Répertoire des vedettes-matière
		7		Source specified in subfield ‡2
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See table page C:14 for coding instructions
				/0 Link display	See table page C:14 for coding instructions
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡0	Record control number (R)
			‡2	Source of heading or term (NR)
			‡5	Institution to which field applies (R)
782*				Subdivision Heading Linking Entry–Chronological Subdivision (R)	Contains a chronological subdivision term that is equivalent to the 150 topical term or 182 chronological subdivision field of the same record. It links headings within a system or from different thesauri or authority files
				Undefined
		0		Library of Congress Subject Headings/Name authority file
		1		LC subject headings for children's literature
		2		Medical Subject Headings/NLM authority file
		3		National Agricultural Library subject authority file
		4		Source not specified
		5		Canadian Subject Headings/NLC authority file
		6		Répertoire des vedettes-matière
		7		Source specified in subfield ‡2
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See table page C:14 for coding instructions
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡0	Record control number (R)
			‡2	Source of heading or term (NR)
			‡5	Institution to which field applies (R)
785*				Subdivision Heading Linking Entry–Form Subdivision (R)	Contains a general subdivision term that is equivalent to the 150 topical term or 180 general subdivision field of the same record. It links headings within a system or from different thesauri or authority files
				Undefined
		0		Library of Congress Subject Headings/Name authority file
		1		LC subject headings for children's literature
		2		Medical Subject Headings/NLM authority file
		3		National Agricultural Library subject authority file
		4		Source not specified
		5		Canadian Subject Headings/NLC authority file
		6		Répertoire des vedettes-matière
		7		Source specified in subfield ‡2
			‡v	Form subdivision (R)
			‡w	Control subfield (NR)	See table page C:14 for coding instructions
				/0 Link display	See table page C:14 for coding instructions
			‡x	General subdivision (R)
			‡y	Chronological subdivision (R)
			‡z	Geographic subdivision (R)
			‡0	Record control number (R)
			‡2	Source of heading or term (NR)
			‡5	Institution to which field applies (R)
788*				Complex Linking Entry Data (NR)	Contains the explanatory text and the headings referred to when the linking relationship between headings from different subject heading systems or thesauri cannot be adequately conveyed by field 700–785. No subelements of the heading referred to are separately subfield coded. Adjacent headings referred to may be contained in a single subfield ‡a. The heading referred to may be an established heading or a subject subdivision that is not equivalent to but is related to the heading in the 1xx field
				Undefined
		0		Library of Congress Subject Headings/Name authority file
		1		LC subject headings for children's literature
		2		Medical Subject Headings/NLM authority file
		3		National Agricultural Library subject authority file
		4		Source not specified
		5		Canadian Subject Headings/NLC authority file
		6		Répertoire des vedettes-matière
		7		Source specified in subfield ‡2
			‡a	Heading referred to (R)
			‡i	Explanatory text (R)
			‡2	Source of heading or term (NR)
			‡5	Institution to which field applies (R)
856				Electronic Location and Access (R)	Contains the information needed to locate and access electronic information. Use to provide supplementary information available electronically about the entity for which the record was created. Repeat field 856 when the location data elements vary (the URL in subfield ‡u or subfields ‡a, ‡b and ‡d, when used). Also, repeat it when more than one access method is used, mirror sites are recorded, different formats/resolutions with different URLs are indicated and related items are recorded
				No information provided
	0			E-mail
	1			FTP
	2			Remote login (Telnet)
	3			Dial-up
	4			HTTP (Hypertext Transfer Protocol)
	7			Method specified in ‡2
				Undefined
		0		Resource
		1		Version of resource
		2		Related resource
		8		No display constant generated
			‡a	Host name (R)
			‡b	Access number (R)
			‡c	Compression of information (R)
			‡d	Path (R)
			‡f	Electronic name (R)
			‡g	Uniform Resource Name (R)
			‡h	Processor of request (NR)
			‡i	Instruction (R)
			‡j	Bits per second (NR)
			‡k	Password (NR)
			‡l	Logon (NR)
			‡m	Contact for access assistance (R)
			‡n	Name of location of host (NR)
			‡o	Operating system (NR)
			‡p	Port (NR)
			‡q	Electronic format type (NR)
			‡r	Settings (NR)
			‡s	File size (R)
			‡t	Terminal emulation (R)
			‡u	Uniform Resource Locator (NR)
			‡v	Hours access method available (R)
			‡w	Record control number (R)
			‡x	Nonpublic note (R)
			‡z	Public note (R)
			‡2	Access method (NR)
			‡3	Materials specified (NR)
945–949				Local Processing Information (R) Note: OCLC defined.	Fields do not remain in master record
	, 0–9			Locally defined
		, 0–9		Locally defined
			‡a–z	Locally defined (R)
952				Cataloger's Notes (R) Note: OCLC defined.
				Undefined
			‡a	Cataloger's notes (NR)
* Do not use in name authority records. Ind=Indicator; R=Repeatable; NR=Nonrepeatable; ==Blank

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