# - Undefined
# - Undefined
|$i - Reference instruction phrase (NR)
$v - Form subdivision (R)
$w - Control subfield (NR)
/0 - Special relationship
/1 - Tracing use restriction
/2 - Earlier form of heading
/3 - Reference display
|$x - General subdivision (R)
$y - Chronological subdivision (R)
$z - Geographic subdivision (R)
$0 - Record control number (R)
$5 - Institution to which field applies (R)
$6 - Linkage (NR)
$8 - Field link and sequence number (R)
Tracing for a general subdivision see also from reference.
Used in an established heading or established heading and subdivision record to trace a see also from reference from an authorized general subdivision to a related established heading.
Most of the content designators defined for field 580 are the same as those defined for field 180 (Heading-General Subdivision), field 480 (See From Tracing-General Subdivision), and field 780 (Subdivision Heading Linking Entry-General Subdivision). Description, guidelines, and input conventions for shared content designators are given in the X80 General Subdivisions-General Information section.
Guidelines for applying the subfield $w (Control subfield) and subfield $i (Reference instruction phrase) in field 580 are given in the Tracings and References-General Information section.
|180||##$xOfficials and employees$xFurloughs|
|580||##$xOfficials and employees$xLeave regulations|