Library of Congress >> MARC >> Bibliographic >> 3XX  >> 321

321 - Former Publication Frequency (R)


MARC 21 Bibliographic - full
May 2020

First Indicator Second Indicator
Undefined
# - Undefined

Undefined
# - Undefined


Subfield Codes
  • $a - Former publication frequency (NR)
  • $b - Dates of former publication frequency (NR)
  • $0 - Authority record control number or standard number (NR)
  • $1 - Real World Object URI (R)
  • $2 - Source (NR)
  • $6 - Linkage (NR)
  • $8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

Former publication frequency of either an item or an update to an item when a current publication frequency is given in field 310 (Current Publication Frequency).


GUIDELINES FOR APPLYING CONTENT DESIGNATORS

INDICATORS

SUBFIELD CODES

$a - Former publication frequency

The complete statement, exclusive of dates, of the former publication frequency.

310 ##$aMonthly,$b1985-
321 ##$aTen no. a year,$b1982-1984
310 ##$aAnnual,$b1983-
321 ##$aMonthly,$bMar. 1972-Dec. 1980
321 ##$aSemiannual,$b1981-1982

A phrase such as frequency varies may be used in field 321 when more than three past frequencies are known.

310 ##$aMonthly,$bJan. 1984-
321 ##$aFrequency varies,$b1966-1983
310 ##$aUpdated quarterly,$bJan.-Mar. 2001-
321 ##$aFrequency of update varies

$b - Dates of former publication frequency

310 ##$aAnnual,$b1983-
321 ##$aBiennial,$b1981/1982
310 ##$aUpdated irregularly,$b2001-
321 ##$aUpdated monthly,$b1998-2000

If subfield $a contains a phrase such as frequency varies, subfield $b contains the inclusive date for the frequencies.

310 ##$aBimonthly,$b1970-
321 ##$aFrequency varies,$b1920-1969

$0 - Authority record control number or standard number

See description of this subfield in Appendix A: Control Subfields.

321 ##$aAnnual$b1993-2005$0http://id.loc.gov/vocabulary/frequencies/ann

$1 - Real World Object URI

See description of this subfield in Appendix A: Control Subfields.

$2 - Source

MARC code that identifies the source of the term or code used to record former publication frequency information.

$6 - Linkage

See description of this subfield in Appendix A: Control Subfields.

$8 - Field link and sequence number

See description of this subfield in Appendix A: Control Subfields.


INPUT CONVENTIONS

Punctuation - Field 321 does not end with a mark of punctuation unless the last word in the field is an abbreviation, initial/letter, or other data that ends with a mark of punctuation. A comma may be recorded at the end of subfield $a when subfield $b is present.

Order of fields - When more than one 321 field is given, their directory entries are usually arranged in chronological order (earliest to latest).

Temporary Data - Known date(s) that may not be the earliest or latest date associated with the former frequency is customarily enclosed within angle brackets (<...>) or omitted.

321 ##$aQuarterly,$b19<85>-

CONTENT DESIGNATOR HISTORY

$0 - Authority record control number or standard number [NEW, 2020]
$1 - Real World Object URI [NEW, 2020]
$2 - Source [NEW, 2020]

Library of Congress >> MARC >> Bibliographic >> 3XX  >> 321
(05/27/2020)
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