| First Indicator Undefined # - Undefined |
Second Indicator Thesaurus 0 - Library of Congress Subject Headings 1 - LC subject headings for children's literature 2 - Medical Subject Headings 3 - National Agricultural Library subject authority file 4 - Source not specified 5 - Canadian Subject Headings 6 - Répertoire de vedettes-matière 7 - Source specified in subfield $2 |
| Subfield Codes |
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| $v - Form subdivision (R) $w - Control subfield (NR) /0 - Link display /1 - Replacement complexity $x - General subdivision (R) $y - Chronological subdivision (R) |
$z - Geographic subdivision (R) $0 - Record control number (R) $2 - Source of heading or term (NR) $5 - Institution to which field applies (R) $6 - Linkage (NR) $8 - Field link and sequence number (R) |
General subdivision term that is equivalent to the 150 topical term or 180 general subdivision field of the same record. It links headings within a system or from different thesauri or authority files.
Most of the content designators defined for field 780 are the same as those defined for field 180 (Heading-General Subdivision), field 480 (See From Tracing-General Subdivision), and field 580 (See Also From Tracing-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 second indicator, subfield $w (Control subfield), and $2 (Source of heading or term) in field 780 are given in the 7XX Heading Linking Entries-General Information section.
Equivalent terms used within a thesaurus in established heading and subdivision records:
| 008/09 | a [established heading record] |
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| 008/11 | a [code indicating LCSH] |
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| 150 | ##$aUniforms | ||||||||
| 780 | #0$xUniforms$0 [record control number] | ||||||||
| 008/09 | d [subdivision record] |
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| 008/11 | a [code indicating LCSH] |
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| 180 | ##$xUniforms | ||||||||
| 750 | #0$aUniforms$0 [record control number] | ||||||||
Established heading topical term is also used as a general subdivision; no separate subdivision record:
| 008/09 | a [established heading record] |
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| 008/11 | a [code indicating LCSH] |
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| 150 | ##$aHistory | ||||||||
| 780 | #0$wa$xHistory | ||||||||
| (03/06/2008) | Contact Us |