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690  Local Subject Added Entry--Topical Term (R)

Record Type

BIB, LBD

Input Standards

Field (Full/Minimal)
Optional/Optional
1st Indicator  Level of subject
blank character No information provided
0 No level specified
1 Primary
2 Secondary
2nd Indicator  Thesaurus
blank character No information provided
0 Library of Congress Subject Headings
1 LC subject headings for children's literature
2 Medical Subject Headings
3 National Agricultural Library subject authority file
4 Source not specified
5 Canadian Subject Headings
6 Répertoire de vedettes-matière
7 Source specified in subfield ǂ2
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards (Full/Minimal)
ǂa Topical term or geographic name entry element (NR) Mandatory/Mandatory
ǂb Topical term following geographic name entry element (NR) Required if applicable/Required if applicable
ǂc Location of event (NR) Required if applicable/Required if applicable
ǂd Active dates (NR) Required if applicable/Required if applicable
ǂe Relator term (NR) Optional/Optional
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 topical subject used as a local subject access point. Field 690 is used for locally created access points and for access points that do not follow standard guidelines. However, if the subject access point is of value to others, then use field 653.

Field 690 is not retained in the WorldCat record. However, it is retained in exported records and records delivered via other services.

For more information, see Subjects--General Information.

1st Indicator

Level of subject. For information about the 1st indicator position, see Subjects--General Information.

 
blank character

No information provided

 
0

No level specified

 
1

Primary

 
2

Secondary

2nd Indicator

Thesaurus. For information about the 2nd indicator position, see Subjects--General Information.

 
blank character

No information provided. No information is provided as to the thesaurus or subject heading system used.

 
0

Library of Congress Subject Headings

 
1

LC subject headings for children's literature

 
2

Medical Subject Headings

 
3

National Agricultural Library subject authority file

 
4

Source not specified

 
5

Canadian Subject Headings

 
6

Répertoire de vedettes-matière

 
7

Source specified in subfield ǂ2

Subfields

 
ǂa Topical term or geographic name entry element

For information about subfield ǂa, see Subjects--General Information.

ǂb Topical term following geographic name entry element

For information about subfield ǂb, see Subjects--General Information.

ǂc Location of event

For information about subfield ǂc, see Subjects--General Information.

ǂd Active dates

For information about subfield ǂd, see Subjects--General Information.

ǂe Relator term

For information about subfield ǂe, see Subjects--General Information.

ǂg Miscellaneous information

For information about subfield ǂg, see Subjects--General Information.

ǂv Form subdivision

For information about subfield ǂv, see Subjects--General Information.

ǂx General subdivision

For information about subfield ǂx, see Subjects--General Information.

ǂy Chronological subdivision

For information about subfield ǂy, see Subjects--General Information.

ǂz Geographic subdivision

For information about subfield ǂz, see Subjects--General Information.

ǂ1 Real World Object URI

For information about subfield ǂ1, see Control Subfields.

ǂ2 Source of heading or term

For information about subfield ǂ2, see Subjects--General Information.

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.

Punctuation

For information about punctuation, see Subjects--General Information.

Indexing

Field 690 is not indexed.

MARC 21

Field 690 is OCLC-defined and therefore not included in MARC 21 Format for Bibliographic Data.

This page last revised: August 20, 2021