Record Type |
||
BIB, LBD |
||
Input Standards |
||
Field (Full/Minimal) | ||
Optional/Optional | ||
1st Indicator Level of subject | ||
![]() |
Undefined | |
2nd Indicator Thesaurus | ||
![]() |
No information provided | |
0 | Library of Congress subject heading | |
1 | LC subject heading for children's literature | |
2 | Medical subject heading | |
3 | National Agricultural Library subject authority file | |
4 | Source not specified | |
5 | Canadian subject heading | |
6 | Répertoire de vedettes-matière | |
7 | Source is specified in subfield ǂ2 | |
Subfields (R=Repeatable NR=Nonrepeatable) | Input Standards (Full/Minimal) | |
ǂa | Geographic name (NR) | Mandatory/Mandatory |
ǂb | Geographic element following geographic name (R) | Required if applicable/Required if applicable |
ǂg | Miscellaneous information (R) | Required if applicable/Required if applicable |
ǂv | Form subdivision (R) | Required if applicable/Required if applicable |
ǂx | General subdivision (R) | Required if applicable/Required if applicable |
ǂy | Chronological subdivision (R) | Required if applicable/Required if applicable |
ǂz | Geographic subdivision (R) | Required if applicable/Required if applicable |
ǂ1 | Real World Object URI (R) | Optional/Optional |
ǂ2 | Source of heading or term (NR) | Required if applicable/Required if applicable |
ǂ3 | Materials specified (NR) | Optional/Optional |
ǂ6 | Linkage (NR) | System supplied/System supplied |
ǂ8 | Field link and sequence number (R) | Optional/Optional |
ǂ9 | Special entry (NR) | Optional/Optional |
Definition |
A locally devised geographic name used as a subject added entry. Use field 691 only for geographic names not based on LC, AC, NLM, NAL, NLC or Sears or for geographic names based on nonstandard applications of these authorities. Use field 651 if the geographic name is based on LC, AC, NLM, NAL, NLC or Sears. |
||||||
WorldCat record retention | Field 691 is not retained in the WorldCat record. However, it is retained in exported records and records delivered via other services. |
||||||
1st Indicator |
Undefined. The 1st indicator position is undefined and contains a blank.
|
||||||
2nd Indicator |
Thesaurus. The thesaurus or subject heading system used in constructing the subject heading. |
||||||
|
|||||||
|
|||||||
|
|||||||
|
|||||||
|
|||||||
|
|||||||
|
|||||||
|
|||||||
|
|||||||
Subfields |
|||||||
ǂa Geographic name | A geographicname. Enter parenthetical qualifying information also in subfield ǂa.
|
||||||
ǂb Geographic element following geographic name | An additional geographic element following the name in subfield ǂa. |
||||||
ǂg Miscellaneous information | Data element that is not more appropriately contained in another defined subfield. |
||||||
ǂv Form subdivision | A specific kind or genre of material defined by the thesaurus being used. Use only when a form subject subdivision is added to a main term. Use subfield ǂv also for form terms when they function as indicated above. Use subfield ǂx if the terms function as general subdivisions. A form subdivision in subfield ǂv is generally the last subfield in the field. Repeat subfield ǂv if you use more than one form subdivision. |
||||||
ǂx General subdivision | A subject subdivision that is not more appropriately contained in subfield ǂv, ǂy or ǂz. Use subfield ǂx only when a general topical subdivision is added to a main term. |
||||||
ǂy Chronological subdivision | A subject subdivision that represents a period of time. Use only when a chronological subject subdivision is added to a main term. |
||||||
ǂz Geographic subdivision | A geographic subject subdivision. Use only when a geographic subject subdivision is added to a main term. |
||||||
ǂ1 Real World Object URI | For information about subfield ǂ1, see Control Subfields. |
||||||
ǂ2 Source of heading or term | A MARC code that identifies the source list from which the heading in a subject added entry was assigned. Use only when the 2nd indicator value is 7. See MARC Code Lists for Relators, Sources, Descriptive Conventions. |
||||||
ǂ3 Materials specified | For information about subfield ǂ3, see Control Subfields. |
||||||
ǂ6 Linkage | Data that link fields when non-Latin script is entered. This subfield is system supplied and does not appear in OCLC online displays. Do not manually add subfield ǂ6. For more information about subfield ǂ6, see Control Subfields. |
||||||
ǂ8 Field link and sequence number | For information about subfield ǂ8, see Control Subfields. |
||||||
ǂ9 Special entry | For information about subfield ǂ9, see Control Subfields. |
||||||
Indexing |
Field 691 is not indexed. |
||||||
MARC 21 |
Field 691 is OCLC-defined and therefore not included in MARC 21 Format for Bibliographic Data. |
This page last revised: December 28, 2020