LC Guidelines: Tracings and References - General Information - 5XX Fields
NACO:
Subfield Codes
$i - Relationship information
This subfield may be used in either AACR2 or RDA NARs to indicate relationships between authorized access points.
$4 - Relationship
Consult LC's Policy, Training, and Cooperative Programs Division before using this subfield.
$w - Control subfield in 5XX See Also From Tracing fields
____/0 Special relationship
Use code n (Not applicable) when neither code a nor b nor r applies and a subsequent character position in subfield $w is coded. In other respects NACO participants should follow the guidelines in the LC usage section for this subfield.
____/1 Tracing use restriction
Use code n (Not applicable) when a subsequent character position in subfield $w is coded. In other respects NACO participants should follow the guidelines in the LC usage section for this subfield.
____/2 Earlier form of heading
Use code n (Not applicable) when a subsequent character position in subfield $w is coded. In other respects NACO participants should follow the guidelines in the LC usage section for this subfield.
____/3 Reference display
Code n (Not applicable) allows the generation of a cross reference and need not be coded in subfield $w/3. In other respects NACO participants should follow the guidelines in the LC usage section for this subfield.
SACO:
All SACO participants should follow the LC Subject guidelines which follow.
LC:
Subfield Codes
$i - Relationship information
LC catalogers applying RDA instructions may use $i to provide relationship information in either AACR2 or RDA NARs to indicate relationships between authorized access points.
NAMES/SERIES:
$w - Control subfield in 5XX See Also From Tracing fields
____/0 Special relationship
r - must be used when subfield $i or $4 are used in NARs.
Do not use the following codes:
d - Acronym |
f - Musical composition |
h - Narrower term |
i - Reference instruction phrase in subfield $i |
t - Immediate parent body |
Codes d and f may occur in LC records created before 1981.
____/1 Tracing use restriction
Do not use the following codes:
a - Name reference structure only |
e - Name and series reference structures |
b - Subject reference structure only |
f - Subject and series reference structures |
c - Series reference structure only |
g - Name, subject, and series reference structures |
d - Name and subject reference structures |
|
Code b may occur in LC records created before 1988.
____/2 Earlier form of heading
Do 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
Do 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.
Use code a (Reference not displayed) or c (Reference not displayed, field 663 used) when appropriate for suppressing a cross reference display.
SUBJECTS:
$w - Control subfield in 5XX See Also From Tracing fields
____/0 Special relationship
Use code g (Broader term) or code n (Related term) in this position.
____/1 Tracing use restriction
Use code n (Not applicable) in this position.
____/2 Earlier form of heading
Use code n (Not applicable) in this position.
____/3 Reference display
Use code n (Not applicable) in this position.
For more information on LC Guidelines, select:
See also: