MARC Authority Format
Heading Linking Entry Fields (7XX)
Fields 700-788 contain information that provides a machine link within a system between equivalent headings whether they are structured in the same or different form, are from the same or different authority files or printed thesauri, or whether they exist as separate authority records.
HEADING LINKING ENTRIES: GENERAL INFORMATION
700 - ESTABLISHED HEADING LINKING ENTRY: PERSONAL NAME
710 - ESTABLISHED HEADING LINKING ENTRY: CORPORATE NAME
711 - ESTABLISHED HEADING LINKING ENTRY: MEETING NAME
730 - ESTABLISHED HEADING LINKING ENTRY: UNIFORM TITLE
750 - ESTABLISHED HEADING LINKING ENTRY: TOPICAL TERM
751 - ESTABLISHED HEADING LINKING ENTRY: GEOGRAPHIC NAME
755 - ESTABLISHED HEADING LINKING ENTRY: GENRE/FORM TERM
780 - SUBDIVISION HEADING LINKING ENTRY: GENERAL SUBDIVISION
781 - SUBDIVISION HEADING LINKING ENTRY: GEOGRAPHIC SUBDIVISION
782 - SUBDIVISION HEADING LINKING ENTRY: CHRONOLOGICAL SUBDIVISION
785 - SUBDIVISION HEADING LINKING ENTRY: FORM SUBDIVISION
788 - COMPLEX LINKINGENTRY DATA
HEADING LINKING ENTRIES: GENERAL INFORMATION
The inclusion of a linking entry field in an established heading or established heading and subdivision record for a name, name/title, uniform title, topical term, form term, or extended subject heading or in an established heading record for an authorized subject subdivision may be used to relate headings.
First indicator
The definition of the first indicator for each 7XX field is the same as in the corresponding 1XX field. A description can be found with the corresponding 1XX field.
Second indicator
Subject heading system/Thesaurus
Specifies the subject heading system or thesaurus used in constructing the heading.
0Library of Congress Subject Headings/LC authority files The subject added entry conforms to and is appropriate for use in the Library of Congress Subject Headings (LCSH) and the LC authority files.
1LC subject headings for children's literature
The subject added entry conforms to the "AC Subject Headings" section of the LCSH and is appropriate for use in the LC Annotated Card Program.
2Medical Subject Headings/NLM authority files
The subject added entry conforms to the NLM authority files.
3National Agricultural Library subject authority file
The subject added entry conforms to the NAL subject authority file.
4Source not specified
The subject added entry conforms to a controlled list that cannot be identified by another defined value or by a code in subfield 2.
5Canadian Subject Headings/NLC authority file
The subject added entry conforms to and is appropriate for use in the Canadian Subject Headings and the NLC authority files.
6Rpertoire des vedettes-matire/NLC authority file
The subject added entry conforms to and is appropriate for use in the Repertoire des vedettes-matiere and the NLC authority files.
7Source specified in subfield 2
The subject added entry conforms to the subject heading/thesaurus building conventions identified by the code contained in subfield 2.
HEADING LINKING ENTRIES: GENERAL INFORMATION p. 2
Special subfield codes:
Subfields defined for the 7XX fields are generally the same as those for the corresponding 1XX fields, where some descriptions can be found. Descriptions of subfield w, subfield 0, subfield 2, and subfield 8 as defined for the 7XX fields are given in this section.
‚wControl subfield
Only one character position (designated by /0) that controls the generation of a link display
from a 7XX field. Subfield w need be used only if the display is to be suppressed.
0 Link display
A one character alphabetic code that controls the suppression of a link display from a 7XX field.
aLink not displayed
Used for local system-dependent reason for suppression that is not covered by code b or c. For interchange purposes, code a is converted to n or a fill character ( | ).
bLink not displayed, field 788 used
cLink not displayed, non-7XX field used
nNot applicable
Used when there is no restriction on displaying a link from the 7XX field. If code n
is applicable, subfield w need not be used.
‚0Record control number
Contains the system control number of the related authority record preceded by the MARC
code, enclosed in parentheses, for the system to which the control number applies. The
source of the code is the USMARC Code List for Organizations.
‚2Source of heading or term
Contains a code that identifies the source of the heading when the second indicator position
contains value 7. The source of the code is the USMARC Code List for Relators, Sources,
Description Conventions that is maintained by the Library of Congress.
‚8Linking number
Contains a number that links a 7XX (Heading Linking) field to one or more other 7XX fields
when it and the other field(s) together form an equivalent for the heading in the 1XX field.
The linking number is a variable length whole number. The same number is used in each of
the related 7XX linking fields.
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700ESTABLISHED HEADING LINKING ENTRY: PERSONAL NAMERepeatable
Contains a personal name heading that is equivalent to the heading contained in the 1XX field or the same record. It links headings within a system or from different thesauri or authority files.
Content designators defined for this field are generally the same as those for 100 field. Descriptions of the second indicator and subfields w, 0, 2, and 8 are given in the Heading Linking Entries: General Information section.
First indicator:
Type of personal name entry element
0Forename
1Surname
3Family name
Second indicator:
Subject heading system/thesaurus
0Library of Congress Subject Headings/LC authority files
1LC subject headings for children's literature
2Medical Subject Headings/NLM authority files
3National Agricultural Library subject authority file
4Source not specified
5Canadian Subject Headings/NLC authority file
6Rpertoire des vedettes-matire /NLC authority file
7Source specified in subfield 2
Subfield codes:
M‚aPersonal name
‚bNumeration
R‚cTitles and other words associated with a name
‚dDates associated with a name
R‚eRelator term
‚fDate of a work
‚gMiscellaneous information
‚hMedium
R‚kForm subheading
‚lLanguage of a work
R‚mMedium of performance for music
R‚nNumber of part/section of a work
‚oArranged statement for music
R‚pName of part/section of a work
‚qFuller form of name
‚rKey for music
‚sVersion
‚tTitle of a work
R‚vForm subdivision
700ESTABLISHED HEADING LINKING ENTRY: PERSONAL NAMEp. 2
‚wControl subfield
0Link display
a Link not displayed
b Link not displayed, field 788 used
c Link not displayed, non-7XX field used
n Not applicable
R‚xGeneral subdivision
R‚yChronological subdivision
R‚zGeographic subdivision
R‚0Record control number
‚2Source of heading or term
‚5Institution to which field applies
‚6Linkage
‚8Linking number
Examples:
1000b‚a Francis, ‚c of Assisi, Saint, ‚d 1182-1226
70005‚w a ‚a Francis, of Assisi, ‚c Saint, ‚d 1182-1226 [NLC English heading]
70006‚w a ‚a Francois, d'Assise, ‚c saint, ‚d 1182-1226 [NLC French heading]
70007‚w a ‚a Francis, of Assisi, ‚c Saint, ‚d 1182-1226 ‚2 [source code] [British Library heading]
1001b‚a Dostoyevsky, Fyodor, ‚d 1821-1881. ‚t Prestuplenie i nakazenie. ‚l English
70011‚w a ‚a Dostoyevsky, Fyodor, ‚d 1821-1881. ‚t Crime and punishment [LC subject heading for children's literature]
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710ESTABLISHED HEADING LINKING ENTRYCORPORATE NAME Repeatable
Contains a corporate name heading that is equivalent to the heading contained in the 1XX field or the same record. It links headings within a system or from different thesauri or authority files.
Content designators defined for this field are generally the same as those for the 110 field. Descriptions of the second indicator and subfields w, 0, 2, and 8 are given in the Heading Linking Entries: General Information section.
First indicator:
Type of corporate name entry element
0Inverted name
1Jurisdiction name
2Name in direct order
Second indicator:
Subject heading system/thesaurus
0Library of Congress Subject Headings/LC authority files
1LC subject headings for children's literature
2Medical Subject Headings/NLM authority files
3National Agricultural Library subject authority file
4Source not specified
5Canadian Subject Headings/NLC authority file
6Rpertoire des vedettes-matire /NLC authority file
7Source specified in subfield 2
Subfield codes:
M‚aCorporate name or jurisdiction name as entry element
R‚bSubordinate unit
‚cLocation of meeting
R‚dDate of meeting or treaty signing
R‚eRelator term
‚fDate of a work
‚gMiscellaneous information
‚hMedium
R‚kForm subheading
‚lLanguage of a work
R‚mMedium of performance for music
R‚nNumber of part/section/meeting
‚oArranged statement for music
R‚pName of part/section of a work
‚rKey for music
‚sVersion
‚tTitle of a work
R‚vForm subdivision
710ESTABLISHED HEADING LINKING ENTRYCORPORATE NAME p. 2
‚wControl subfield
0Link display
a Link not displayed
b Link not displayed, field 788 used
c Link not displayed, non-7XX field used
n Not applicable
R‚xGeneral subdivision
R‚yChronological subdivision
R‚zGeographic subdivision
R‚0Record control number
‚2Source of heading or term
‚5Institution to which field applies
‚6Linkage
‚8Linking number
Examples:
1102b‚a Last Poets (Group)
71027‚w a ‚a Last Poets ‚2 [source code]
1102b‚a Royal Society of Medicine (Great Britain)
71027‚w a ‚a Royal Society of Medicine ‚2 [source code] [British Library heading]
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711ESTABLISHED HEADING LINKING ENTRY: MEETING NAMERepeatable
Contains a meeting name heading that is equivalent to the heading contained in the 1XX field or the same record. It links headings within a system or from different thesauri or authority files.
Content designators defined for this field are generally the same as those for the 111 field. Descriptions of the second indicator and subfields w, 0, 2, and 8 are given in the Heading Linking Entries: General Information section.
First indicator:
Type of meeting name entry element
0Inverted name
1Jurisdiction name
2Name in direct order
Second indicator:
Subject heading system/thesaurus
0Library of Congress Subject Headings/LC authority files
1LC subject headings for children's literature
2Medical Subject Headings/NLM authority files
3National Agricultural Library subject authority file
4Source not specified
5Canadian Subject Headings/NLC authority file
6Rpertoire des vedettes-matire /NLC authority file
7Source specified in subfield 2
Subfield codes:
M‚aMeeting name or jurisdiction name as entry element
‚cLocation of meeting
‚dDate of meeting
R‚eSubordinate unit
‚fDate of a work
‚gMiscellaneous information
‚hMedium
R‚kForm subheading
‚lLanguage of a work
R‚nNumber of part/section/meeting
R‚pName of part/section of a work
‚q Name of meeting following jurisdiction name entry element
‚sVersion
‚tTitle of a work
R‚vForm subdivision
‚wControl subfield
0Link display
a Link not displayed
b Link not displayed, field 788 used
c Link not displayed, non-7XX field used
n Not applicable
711ESTABLISHED HEADING LINKING ENTRY: MEETING NAMEp. 2
R‚xGeneral subdivision
R‚yChronological subdivision
R‚zGeographic subdivision
R‚0Record control number
‚2Source of heading or term
‚5Institution to which field applies
‚6Linkage
‚8Linking number
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730ESTABLISHED HEADING LINKING ENTRY: UNIFORM TITLERepeatable
Contains a uniform title heading that is equivalent to the heading contained in the 1XX field or the same record. It links headings within a system or from different thesauri or authority files.
Content designators defined for this field are generally the same as those for the 130 field. Descriptions of the second indicator and subfields w, 0, 2, and 8 are given in the Heading Linking Entries: General Information section.
First indicator:
bUndefined
Second indicator:
Subject heading system/thesaurus
0Library of Congress Subject Headings/LC authority files
1LC subject headings for children's literature
2Medical Subject Headings/NLM authority files
3National Agricultural Library subject authority file
4Source not specified
5Canadian Subject Headings/NLC authority file
6Rpertoire des vedettes-matire/NLC authority file
7Source specified in subfield 2
Subfield codes:
M‚aUniform title
R‚dDate of treaty signing
‚fDate of a work
‚gMiscellaneous information
‚hMedium
R‚kForm subheading
‚lLanguage of a work
R‚mMedium of performance for music
R‚nNumber of part/section of a work
‚oArranged statement for music
R‚pName of part/section of a work
‚rKey for music
‚sVersion
‚tTitle of a work
R‚vForm subdivision
‚wControl subfield
0Link display
a Link not displayed
b Link not displayed, field 788 used
c Link not displayed, non-7XX field used
n Not applicable
R‚xGeneral subdivision
R‚yChronological subdivision
R‚zGeographic subdivision
R‚0Record control number
730ESTABLISHED HEADING LINKING ENTRY: UNIFORM TITLEp. 2
‚2Source of heading or term
‚5Institution to which field applies
‚6Linkage
‚8Linking number
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750ESTABLISHED HEADING LINKING ENTRY:TOPICAL TERMRepeatable
Contains a topical term heading that is equivalent to the heading contained in the 1XX field or the same record. It links headings within a system or from different thesauri or authority files.
Content designators defined for this field are generally the same as those for the 150 field. Descriptions of the second indicator and subfields w, 0, 2, and 8 are given in the Heading Linking EntriesGeneral Information section.
First indicator:
bUndefined
Second indicator:
Subject heading system/thesaurus
0Library of Congress Subject Headings/LC authority files
1LC subject headings for children's literature
2Medical Subject Headings/NLM authority files
3National Agricultural Library subject authority file
4Source not specified
5Canadian Subject Headings/NLC authority file
6Rpertoire des vedettes-matire /NLC authority file
7Source specified in subfield 2
Subfield codes:
M‚aTopical term or geographic name as entry element
‚bTopical term following geographic name as entry element
R‚vForm subdivision
‚wControl subfield
0Link display
a Link not displayed
b Link not displayed, field 788 used
c Link not displayed, non-7XX field used
n Not applicable
R‚xGeneral subdivision
R‚yChronological subdivision
R‚zGeographic subdivision
R‚0Record control number
‚2Source of heading or term
‚5Institution to which field applies
‚6Linkage
‚8Linking number
750ESTABLISHED HEADING LINKING ENTRY:TOPICAL TERMp. 2
Examples:
150bb‚a Genetic engineering [LCSH heading]
750b2‚a Genetic Engineering [NLM heading]
150bb‚a Hydroponique [French Canadian subject]
750b5‚a Hydroponics [English Canadian subject]
150bb‚a Radiography in orthopedics [LCSH heading
750b2‚8 1 ‚w b ‚a Orthopedics [MeSH heading]
750b2‚8 1 ‚w b ‚a Radiography [MeSH heading]
150bb‚a Cancer ‚x Nursing [LCSH heading]
450bb‚a Oncologic nursing
750b2‚a Neoplasms ‚x Nursing [MeSH heading]
750b2‚a Oncologic Nursing [MeSH heading]
150bb‚a Drill and minor tactics [LCSH heading]
750b7‚a Military training ‚2 lctgm [LC Thesaurus for Graphic Materials heading]
Topical term used in LCSH both as an established heading and as a general subdivision:
008/09 d [subdivision record]
180bb‚x Uniforms
750b0‚a Uniforms ‚0 [record control number]
008/09 a [established heading record]
150bb‚a Uniforms
780b0‚x Uniforms ‚0 [record control number]
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751ESTABLISHED HEADING LINKING ENTRY: GEOGRAPHIC NAMERepeatable
Contains a geographic name heading that is equivalent to the heading contained in the 1XX field or the same record. It links headings within a system or from different thesauri or authority files.
Content designators defined for this field are generally the same as those for the 151 field. Descriptions of the second indicator and subfields w, 0, 2, and 8 are given in the Heading Linking Entries: General Information section.
First indicator:
bUndefined
Second indicator:
Subject heading system/thesaurus
0Library of Congress Subject Headings/LC authority files
1LC subject headings for children's literature
2Medical Subject Headings/NLM authority files
3National Agricultural Library subject authority file
4Source not specified
5Canadian Subject Headings/NLC authority file
6Rpertoire des vedettes-matire /NLC authority file
7Source specified in subfield 2
Subfield codes:
M‚aGeographic name
R‚vForm subdivision
‚wControl subfield
0Link display
a Link not displayed
b Link not displayed, field 788 used
c Link not displayed, non-7XX field used
n Not applicable
R‚xGeneral subdivision
R‚yChronological subdivision
R‚zGeographic subdivision
R‚0Record control number
‚2Source of heading or term
‚5Institution to which field applies
‚6Linkage
‚8Linking number
751ESTABLISHED HEADING LINKING ENTRY: GEOGRAPHIC NAMEp. 2
Examples:
151bb‚a New York (N.Y.) [LCSH heading]
751b2‚a New York City [MeSH heading]
Geographic name used in LCSH both as an established heading and as a geographic subdivision:
008/09 d [subdivision record]
181bb‚zFrance‚zCorsica
751b0‚a Corsica (France) ‚0 [record control number]
008/09 a [established heading record]
151bb‚a Corsica (France)
781b0‚zFrance‚zCorsica‚0 [record control number]
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755ESTABLISHED HEADING LINKING ENTRY: GENRE/FORM TERMRepeatable
Contains a genre/form term heading that is equivalent to the heading contained in the 1XX field or the same record. It links headings within a system or from different thesauri or authority files.
Content designators defined for this field are generally the same as those for the 155 field. Descriptions of the second indicator and subfields w, 0, 2, and 8 are given in the Heading Linking Entries: General Information section.
First indicator:
bUndefined
Second indicator:
Subject heading system/thesaurus
0Library of Congress Subject Headings/LC authority files
1LC subject headings for children's literature
2Medical Subject Headings/NLM authority files
3National Agricultural Library subject authority file
4Source not specified
5Canadian Subject Headings/NLC authority file
6Rpertoire des vedettes-matire /NLC authority file
7Source specified in subfield 2
Subfield codes:
M‚aGenre/form term as entry element
R‚vForm subdivision
‚wControl subfield
0Link display
a Link not displayed
b Link not displayed, field 788 used
c Link not displayed, non-7XX field used
n Not applicable
R‚xGeneral subdivision
R‚yChronological subdivision
R‚zGeographic subdivision
R‚0Record control number
‚2Source of heading or term
‚5Institution to which field applies
‚6Linkage
‚8Linking number
Examples:
155bb‚a Periodicals ‚v Indexes [LCSH heading]
755b6‚a Periodiques ‚v Indexes [French Canadian heading]
Topical term used both as an established heading and as a general subdivision:
185bb‚v atlases [AAT subdivision record]
755b7‚a atlases ‚0 [record control number] ‚2 aat
155bb‚a atlases [AAT established heading record]
785b7‚v atlases ‚0 [record control number] ‚2 aat
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780SUBDIVISION HEADING LINKING ENTRY: GENERAL SUBDIVISIONRepeatable
Contains a general subdivision heading that is equivalent to the heading contained in the 1XX field or the same record. It links headings within a system or from different thesauri or authority files.
Content designators defined for this field are generally the same as those for the 180 field. Descriptions of the second indicator and subfields w, 0, 2, and 8 are given in the Heading Linking Entries: General Information section.
First indicator:
bUndefined
Second indicator:
Subject heading system/thesaurus
0Library of Congress Subject Headings/LC authority files
1LC subject headings for children's literature
2Medical Subject Headings/NLM authority files
3National Agricultural Library subject authority file
4Source not specified
5Canadian Subject Headings/NLC authority file
6Rpertoire des vedettes-matire /NLC authority file