First Indicator | Second Indicator |
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Undefined # - Undefined |
Thesaurus 0 - Library of Congress Subject Headings 1 - Library of Congress Children's and Young Adults' Subject Headings 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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Form subdivision term that is equivalent to the 155 genre/form or 185 form 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 785 are the same as those defined for field 185 (Heading-Form Subdivision), field 485 (See From Tracing-Form Subdivision), and field 585 (See Also From Tracing-Form Subdivision). Description, guidelines, and input conventions for shared content designators are given in the X85 Form Subdivisions-General Information section.
Guidelines for applying the second indicator, subfield $w (Control subfield), subfield $2 (Source of heading or term), subfield $i (Relationship information), and subfield $4 (Relationship) in field 785 are given in the 7XX Heading Linking Entries-General Information section.
Established heading genre/form term is also used as a form subdivision; no separate subdivision record:
008/09 | a [established heading record] |
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008/11 | a [code indicating LCSH] |
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155 | ##$aPeriodicals | ||||||||
785 | #0$wa$vPeriodicals |