LC Usage (LC Guidelines: Tracing and Reference Fields - General Information)

Alternate Graphic Representation:

LC does not use alternate graphic representation fields in authority records.

Reference Fields:

LC does not use field 665 (History Reference). Records created before mid-February 1981 may contain this field.

Tracing Fields:

LC does not create separate subdivision records and has not implemented the following fields:

480 See From Tracing - General Subdivision

481 See From Tracing - Geographic Subdivision

482 See From Tracing - Chronological Subdivision

580 See Also From Tracing - General Subdivision

581 See Also From Tracing - Geographic Subdivision

582 See Also From Tracing - Chronological Subdivision

Subfield Codes:

LC does not use the following subfields in 4XX and 5XX tracing fields:

$i - Reference instruction phrase (All reference instruction phrases are generated from subfield $w codes or are tag-related in the LC system.)

$5 - Institution to which field applies

$w - Control subfield in 4XX See From Tracing fields:

____/0 Special relationship

LC does not use the following codes:

a - Earlier heading

b - Later heading

d - Acronym

f - Musical composition

g - Broader term

h - Narrower term

i - Reference instruction phrase in subfield $i

Code d may occur in LC records created before 1981.

____/1 Tracing use restriction

LC does not use the following codes:

a - Name reference structure only

b - Subject reference structure only

c - Series reference structure only

d - Name and subject reference structures

e - Name and series reference structures

f - Subject and series reference structures

g - Name, subject, and series reference structures

____/2 Earlier form of heading

LC does not use the following code:

o - Earlier established form of heading (other authority file)

Code a (Pre-AACR 2 form of heading (national name authority file)) is used when the tracing is for a linking reference from a pre-AACR 2 heading.

Code e (Earlier established form of heading (national authority file)) is used in the national name authority file primarily when a reference from the former heading is appropriate under normal AACR 2 reference practice, and the former heading is not covered by code a. This includes former headings that were previously coded either as AACR 2 (code c) or Non-AACR 2 form used with AACR 2 (code d). Code e is used in the national subject authority file when a reference from the former heading is appropriate under the reference practice of the applicable subject heading/thesaurus conventions.

The following obsolete codes may occur in LC records created before the adoption of AACR 2 in Jan. 1981, until these records have been evaluated (008/29 , Reference evaluation, code a) and the authority record updated.

b - AACR 1 [obsolete]

c - AACR 2 [obsolete]

d - Non-AACR 2 form used with AACR 2 [obsolete]

____/3 Reference display

LC does not use the following codes:

c - Reference not displayed, field 663 or 360 used

d - Reference not displayed, field 665 used

LC has not used field 665 since mid-Feb. 1981.

$w - Control subfield in 5XX See Also from Tracing fields:

____/0 Special relationship

LC does not use the following codes:

d - Acronym

f - Musical composition

h - Narrower term

i - Reference instruction phrase in subfield $i

Codes d and f may occur in LC records created before 1981.

____/1 Tracing use restriction

LC does not use the following codes:

a - Name reference structure only

b - Subject reference structure only

c - Series reference structure only

d - Name and subject reference structures

e - Name and series reference structures

f - Subject and series reference structures

g - Name, subject, and series reference structures

Code b may occur in LC records created before 1988.

____/2 Earlier form of heading

LC does not use the following codes:

a - Pre-AACR 2 form of heading (national name authority file)

e - Earlier established form of heading (national authority file)

o - Earlier established form of heading (other authority file)

____/3 Reference display

LC does not use the following codes:

b - Reference not displayed, field 664 used

d - Reference not displayed, field 665 used

LC has not used field 665 since mid-Feb. 1981. Records created before that time may contain code d in subfield $w/3.

See also:

NACO/LSP Usage [Tracing and Reference Fields - General Information]

For more information on LC Guidelines, select:

Guidelines for Usage: NACO/LSP and LC

To return:

Use the key.