MARC 21 Concise Authority: Heading Linking Entry Fields (7XX)
This is an ARCHIVED VERSION of the 2000 electronic
edition of the MARC 21 Concise Formats. Please see www.loc.gov/marc/concise/
for the most up-to-date version of the electronic MARC 21 Concise Formats.
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.
Information for Translators and Other Users
Items highlighted in red indicate changes made after
the 1998 edition of the USMARC Concise Formats was published (This publication
included the 1993 base text, along with Updates No. 1 (July 1995) and No. 2 (March
1997) of the USMARC Format for Authority Data).
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 related such headings as
- Equivalent names in a multilingual thesaurus
- Example: National Library of Canada English heading Francis,
of Assisi, Saint, 1182-1226 and National Library of Canada French
heading François, d'Assise, saint, 1182-1226
- Equivalent topical term headings in different authority systems
- Example:Library of Congress Subject Headings (LCSH) headings
Medical referral and Medical consultation and Medical
Subject Headings (MeSH) heading Referral and Consultation
- A topical term heading (field 150) and the same or similar term used as
a subject subdivision (field 78X)
-
Example: established term
History and the subject subdivision
History
-
Example: established term
Twentieth century and the subject subdivision
20th century
- A geographic name heading (field 151) and the indirect form of that name
used as a geographic subject subdivision (field 751)
-
Example: established heading
Rome (N.Y.) and the subject subdivision
New York (State) -- Rome.
- A genre/form term heading (field 155) and the same or similar term used
as a form subject subdivision (field 755)
-
Example: established heading
Periodicals and the subject subdivision
Periodicals.
The 7XX field tag identifies whether the heading linking entry field contains
an established heading (fields 700-755) or an authorized subdivision heading (fields
780-785). The second indicator or the subfield $2 identify the authority system
to which the heading in field 7XX belongs. Subfield $0 (Record control number)
contains the system control number of the related record when a separate MARC
authority record exists for the 7XX heading.
A relationship that cannot be adequately expressed by the 700-785 linking entry fields is
described textually in field 788.
Guidelines for the second indicator, subfield $2 (Source of heading or term),
and subfield $w (Control subfield) in the 7XX fields are provided in this section.
Guidelines for applying the other content designators defined for fields 700-785
are provided in each field's corresponding section.
Indicators
- First
The definition of the first indicator for each 7XX field
is the same as in the corresponding 1XX (Heading) field. A
description can be found with the corresponding
1XX
field.
- Second - Thesaurus
Specifies the subject heading system or thesaurus used in
constructing the heading.
- 0 - Library of Congress Subject
Headings/Name authority file
The subject added entry conforms to and is
appropriate for use in the
Library of Congress Subject Headings (LCSH)
and/or the Name Authority Cooperative (NACO) file.
- 1 - LC subject headings for children's
literature
The subject added entry conforms to the "AC Subject
Headings" section of the
LCSH
- 2 - Medical Subject Headings/NLM
name authority file
The subject added entry conforms to
Medical Subject Headings (MeSH) and/or the NLM
name authority files.
- 3 - National Agricultural Library
subject authority file
The subject added entry conforms to the NAL subject
authority file.
- 4 - Source 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.
- 5 - Canadian Subject Headings/NLC
name authority file
The subject added entry conforms to and is
appropriate for use in the
Canadian Subject Headings and/or the
National Library of Canada name authority file.
- 6 - Répertoire de vedettes-matière
The subject added entry conforms to and is
appropriate for use in the
Répertoire de
vedettes-matière
- 7 - Source specified in subfield $2
The subject added entry conforms to a controlled list other than that specified by one of
the other defined values and for which an identifying MARC code is contained in subfield
$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 both subfield $w and subfield
$2 defined for the 7XX fields are given in this section.
- $w - Control subfield
(NR)
One character position (designated by /0) that controls
the generation of a link display from a 700-785 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 700-785 field.
- a - Link 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 code n of a fill character
( | ).
- b - Link not displayed, field 788 used
- c - Link not displayed, non-7XX field used
- n - Not 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.
- $2 - Source of heading or term
(NR)
A MARC code that identifies the source of
the heading when the second indicator position contains
value 7. The source of the code is the
MARC Code Lists
for Relators, Sources, Description Conventions that is maintained by the
Library of Congress.
Examples
785 |
#7$vatlases
$0[record control number]
$2att |
750 |
#0$81
$wb
$aMedical referral |
700 |
11$wa
$aDostoyevsky, Fyodor,
$d1821-1881.
$tCrime and punishment |
710 |
27$wa
$aLast Poets
$2[source code] |
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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. See field
100 for descriptions of most content designators.
Indicators
- First - Type of personal name entry
element
- 0 - Forename
- 1 - Surname
- 3 - Family
name
- Second - Thesaurus
- 0 - Library of Congress Subject
Headings/Name authority file
- 1 - LC subject headings for
children's literature
- 2 - Medical Subject Headings/NLM
name authority file
- 3 - National Agricultural Library
subject authority file
- 4 - Source not
specified
- 5 - Canadian Subject Headings/NLC
name authority file
- 6 - Répertoire de
vedettes-matière
- 7 - Source specified in subfield
$2
Subfield Codes
- $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)
Attribution information for names when the responsibility is unknown or uncertain.
- $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 Heading Linking Entries--General
Information
- /0 - Link display
- a - Link not displayed
- b - Link not displayed, field 788 used
- c - Link not displayed, non-7XX field used
- n - Not applicable
- $x - General subdivision
(R)
- $y - Chronological subdivision
(R)
- $z - Geographic subdivision
(R)
- $0 - Record control number
(R)
See
Control
Subfields
- $2 - Source of heading or term
(NR)
See Heading Linking Entries---General
Information
- $5 - Institution to which field applies (R)
See Control
Subfields
- $6 - Linkage
(NR)
See
Control
Subfields
- $8 - Field link and sequence number
(R)
See
Control
Subfields
Examples
700 |
05$wa
$aAugustin
$csaint, évêque d'Hippone.
$0(CaOONL)0053A1978F# |
700 |
11$wa
$aDostoyevsky, Fyodor,
$d1821-1881.
$tCrime and punishment
[LC name/title (as subject)
heading for children's
literature] |
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A corporate name heading 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. See field
110 for descriptions of most content designators.
Indicators
- First - Type of corporate name entry
element
- 0 - Inverted name
- 1 - Jurisdiction
name
- 2 - Name in direct
order
- Second - Thesaurus
- 0 - Library of Congress Subject
Headings/Name authority file
- 1 - LC subject headings for
children's literature
- 2 - Medical Subject Headings/NLM
name authority file
- 3 - National Agricultural Library
subject authority file
- 4 - Source not
specified
- 5 - Canadian Subject Headings/NLC
name authority file
- 6 - Répertoire de
vedettes-matière
- 7 - Source specified in subfield
$2
Subfield Codes
- $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 - 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 Heading Linking Entries--General
Information
- /0 - Link display
- a - Link not displayed
- b - Link not displayed, field 788 used
- c - Link not displayed, non-7XX field used
- n - Not applicable
- $x - General subdivision
(R)
- $y - Chronological subdivision
(R)
- $z - Geographic subdivision
(R)
- $0 - Record control number
(R)
See
Control
Subfields
- $2 - Source of heading or term
(NR)
See Heading Linking Entries--General
Information
- $5 - Institution to which field applies (R)
See Control
Subfields
- $6 - Linkage
(NR)
See
Control
Subfields
- $8 - Field link and sequence number
(R)
See
Control
Subfields
Examples
710 |
25$wa
$aNational Gallery of Canada
$0(CaOONL)0000J0193E# |
710 |
27$wa
$aRoyal Society of Medicine
$2[source code] |
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A meeting name that is equivalent to the name contained in the 111 field or the
same record. It links headings within a system or from different thesauri or authority
files. See field
111 for descriptions of most content designators.
Indicators
- First - Type of meeting name entry
element
- 0 - Inverted name
- 1 - Jurisdiction
name
- 2 - Name in direct
order
- Second - Thesaurus
- 0 - Library of Congress Subject
Headings/Name authority file
- 1 - LC subject headings for
children's literature
- 2 - Medical Subject Headings/NLM
name authority file
- 3 - National Agricultural Library
subject authority file
- 4 - Source not
specified
- 5 - Canadian Subject Headings/NLC
name authority file
- 6 - Répertoire de
vedettes-matière
- 7 - Source specified in subfield
$2
Subfield Codes
- $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 Heading Linking Entries--General
Information
- /0 - Link display
- a - Link not displayed
- b - Link not displayed, field 788 used
- c - Link not displayed, non-7XX field used
- n - Not applicable
- $x - General subdivision
(R)
- $y - Chronological subdivision
(R)
- $z - Geographic subdivision
(R)
- $0 - Record control number
(R)
See
Control
Subfields
- $2 - Source of heading or term
(NR)
See Heading Linking Entries--General
Information
- $5 - Institution to which
field applies
(R)
See
Control
Subfields
- $6 - Linkage
(NR)
See
Control
Subfields
- $8 - Field link and sequence number
(R)
See
Control
Subfields
Example
711 |
25$wa
$aConférence canadienne des sciences de I'information
$n(10e :
$d1982 :
$cOttawa, Ont.)
$0(CaOONL)0014G4758F# |
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A uniform title heading that is equivalent to the heading contained in the 130
field of the same record. It links headings within a system or from different
thesauri or authority files. See field
130 for descriptions of most content designators.
Indicators
- First - Undefined
- Second - Thesaurus
- 0 - Library of Congress Subject
Headings/Name authority file
- 1 - LC subject headings for
children's literature
- 2 - Medical Subject Headings/NLM
name authority file
- 3 - National Agricultural Library
subject authority file
- 4 - Source not
specified
- 5 - Canadian Subject Headings/NLC
name authority file
- 6 - Répertoire de
vedettes-matière
- 7 - Source specified in subfield
$2
Subfield Codes
- $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 Heading Linking Entries--General
Information
- /0 - Link display
- a - Link not displayed
- b - Link not displayed, field 788 used
- c - Link not displayed, non-7XX field used
- n - Not applicable
- $x - General subdivision
(R)
- $y - Chronological subdivision
(R)
- $z - Geographic subdivision
(R)
- $0 - Record control number
(R)
See
Control
Subfields
- $2 - Source of heading or term
(NR)
See Heading Linking Entries--General
Information
- $5 - Institution to which field applies (R)
See Control
Subfields
- $6 - Linkage
(NR)
See
Control
Subfields
- $8 - Field link and sequence number
(R)
See
Control
Subfields
Example
730 |
#5$wa
$aBible.
$pA.T.
$0(CaOONL)0004E5217F# |
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A topical term heading that is equivalent to the heading contained in 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. See field
150 for descriptions of most content designators.
Indicators
- First - Undefined
- Second - Thesaurus
- 0 - Library of Congress Subject
Headings/Name authority file
- 1 - LC subject headings for
children's literature
- 2 - Medical Subject Headings/NLM
name authority file
- 3 - National Agricultural Library
subject authority file
- 4 - Source not
specified
- 5 - Canadian Subject Headings/NLC
name authority file
- 6 - Répertoire de
vedettes-matière
- 7 - Source specified in subfield
$2
Subfield Codes
Examples
750 |
#0$81
$wb
$aMedical referral |
750 |
#0$81
$wb
$aMedical consultation |
750 |
#2$81
$wb
$aOrthopedics |
750 |
#2$81
$wb
$aRadiography |
750 |
#0$aCancer
$xNursing |
750 |
#2$aNeoplasms
$xNursing |
750 |
#2$aOncologic Nursing |
750 |
#7$aMilitary training
$2lctgm |
750 |
#0$aDrill and minor tactics
|
750 |
#0$aUniforms
$0[record control number] |
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A geographic name heading that is equivalent to the heading contained in 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. See field
151 for descriptions of most content designators.
Indicators
- First - Undefined
- Second - Thesaurus
- 0 - Library of Congress Subject
Headings/Name authority file
- 1 - LC subject headings for
children's literature
- 2 - Medical Subject Headings/NLM
name authority file
- 3 - National Agricultural Library
subject authority file
- 4 - Source not
specified
- 5 - Canadian Subject Headings/NLC
name authority file
- 6 - Répertoire de
vedettes-matière
- 7 - Source specified in subfield
$2
Subfield Codes
Examples
751 |
#2$aNew York City |
751 |
#0$aNew York (N.Y.) |
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A genre/form term heading 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. See field
155 for descriptions of most content designators.
Indicators
- First - Undefined
- Second - Thesaurus
- 0 - Library of Congress Subject
Headings/Name authority file
- 1 - LC subject headings for
children's literature
- 2 - Medical Subject Headings/NLM
name authority file
- 3 - National Agricultural Library
subject authority file
- 4 - Source not
specified
- 5 - Canadian Subject Headings/NLC
name authority file
- 6 - Répertoire de
vedettes-matière
- 7 - Source specified in subfield
$2
Subfield Codes
Examples
755 |
#6$aPériodiques
$vIndex |
755 |
#0$aPeriodicals
$vIndexes |
755 |
#7$aatlases
$0[record control number]
$2aat |
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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. See field
180 for descriptions of most content designators.
Indicators
- First - Undefined
- Second - Thesaurus
- 0 - Library of Congress Subject
Headings/Name authority file
- 1 - LC subject headings for
children's literature
- 2 - Medical Subject Headings/NLM
name authority file
- 3 - National Agricultural Library
subject authority file
- 4 - Source not
specified
- 5 - Canadian Subject Headings/NLC
name authority file
- 6 - Répertoire de
vedettes-matière
- 7 - Source specified in subfield
$2
Subfield Codes
Examples
780 |
#0$wc
$xCorrosion |
780 |
#0$xUniforms
$0[record control number] |
780 |
#0$wa
$xHistory |
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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. See field
181 for descriptions of most content designators.
Indicators
- First - Undefined
- Second - Thesaurus
- 0 - Library of Congress Subject
Headings/Name authority file
- 1 - LC subject headings for
children's literature
- 2 - Medical Subject Headings/NLM
name authority file
- 3 - National Agricultural Library
subject authority file
- 4 - Source not
specified
- 5 - Canadian Subject Headings/NLC
name authority file
- 6 - Répertoire de
vedettes-matière
- 7 - Source specified in subfield
$2
Subfield Codes
Examples
781 |
#0$zUkraine, Southern |
781 |
#0$zNew York (State)
$zRome |
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A chronological subdivision heading 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. See field
182 for descriptions of most content designators.
Indicators
- First - Undefined
- Second - Thesaurus
- 0 - Library of Congress Subject
Headings/Name authority file
- 1 - LC subject headings for
children's literature
- 2 - Medical Subject Headings/NLM
name authority file
- 3 - National Agricultural Library
subject authority file
- 4 - Source not
specified
- 5 - Canadian Subject Headings/NLC
name authority file
- 6 - Répertoire de
vedettes-matière
- 7 - Source specified in subfield
$2
Subfield Codes
Example
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A form subdivision term that is
equivalent to the 155 genre/form term or 185 form subdivision field of the same record.
It links headings within a system or from different thesauri or authority files. See
field
185 for descriptions of most content designators.
Indicators
- First - Undefined
- Second - Thesaurus
- 0 - Library of Congress Subject
Headings/Name authority file
- 1 - LC subject headings for
children's literature
- 2 - Medical Subject Headings/NLM
name authority file
- 3 - National Agricultural Library
subject authority file
- 4 - Source not
specified
- 5 - Canadian Subject Headings/NLC
name authority file
- 6 - Répertoire de
vedettes-matière
- 7 - Source specified in subfield
$2
Subfield Codes
Examples
785 |
#7$vatlases
$0[record control number]
$2aat |
785 |
#0$wa
$vPeriodicals |
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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 fields 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.
Indicators
- First - Undefined
- Second - Thesaurus
- 0 - Library of Congress Subject
Headings/Name authority file
- 1 - LC subject headings for
children's literature
- 2 - Medical Subject Headings/NLM
name authority file
- 3 - National Agricultural Library
subject authority file
- 4 - Source not
specified
- 5 - Canadian Subject Headings/NLC
name authority file
- 6 - Répertoire de
vedettes-matière
- 7 - Source specified in subfield
$2
Subfield Codes
Examples
788 |
#0$isubdivision
$aForeign bodies
$iunder names of organs, e.g.
$aEye--Foreign bodies |
788 |
#7$iterms
$aChinese
$iand
$aFurniture
$iare separate facets.
$2aat |
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