Authority 070

Kezdőlap - A MARC21 authority formátum - Authority 01X-09X

First Indicator

Undefined

'#' - Undefined

Second Indicator

Undefined

'#' - Undefined

Subfield Codes

$a - Classification number (NR)

$b - Item number (NR)

$d - Volumes/dates to which call number applies (NR)

$6 - Linkage (NR)

$8 - Field link and sequence number (R)

FIELD DEFINITION AND SCOPE

Call number assigned by the National Agricultural Library (NAL) to a series when all or part of the series is classified as a collected set or with the main series (646, Series Classification Practice, subfield $a, code c or m).

Used only for class numbers and call numbers assigned by NAL. May also contain NAL accession numbers for visual materials.

May also contain the volumes/dates to which the number applies. Varying numbers for different ranges of volumes/dates within a series are contained in separate 070 fields.

Prior to 1965, NAL used a USDA library classification scheme. In 1965, NAL began using the Library of Congress Classification for all newly-cataloged materials. Both schemes are still used because some series title changes have been kept with the USDA scheme call number.

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

INDICATORS

Both indicator positions are undefined; each contains a blank (#).

SUBFIELD CODES

$a - Classification number

070 ##$a99.8$bF76322

[Number assigned from the USDA library scheme]

$b - Item number

070 ##$aQH545.A$bT6

[Number assigned from the LC classification scheme]

$d - Volumes/dates to which call number applies

Statement used only when the call number does not apply to all items of the series. Applies to: may be generated for display.

May also contain a copy (or set) number.

$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

Order - The 070 field for a current call number precedes the 070 field for an earlier call number.

Capitalization - Alphabetic characters in the classification portion of the field are usually uppercase.

Kezdőlap - A MARC21 authority formátum - Authority 01X-09X