| 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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| $a - Topical term or geographic name entry element (NR) $b - Topical term following geographic name entry element (NR) $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) |
Topical term that is equivalent to the 150 topical term or 180 general subdivision heading 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 750 are the same as those defined for field 150 (Heading-Topical Term), field 450 (See From Tracing-Topical Term), and field 550 (See Also From Tracing-Topical Term). Description, guidelines, and input conventions for shared content designators are given in the X50 Topical Terms-General Information section.
Guidelines for applying the second indicator, subfield $w (Control subfield), and subfield $2 (Source of heading or term) in field 750 are given in the 7XX Heading Linking Entries-General Information section.
Equivalent topical terms from different thesauri:
| 008/09 | a [established heading record] |
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| 008/11 | c [code indicating MeSH] |
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| 150 | ##$aNeoplasms$xNursing | ||||||||
| 750 | #0$aCancer$xNursing [Heading from LCSH] |
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| 008/09 | a [established heading record] |
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| 008/11 | c [code indicating MeSH] |
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| 150 | ##$aOncologic Nursing | ||||||||
| 750 | #0$aCancer$xNursing [Heading from LCSH] |
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| 008/09 | a [established heading record] |
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| 008/11 | a [code indicating LCSH] |
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| 150 | ##$aCancer$xNursing | ||||||||
| 450 | ##$aOncologic nursing | ||||||||
| 750 | #2$aNeoplasms$xNursing | ||||||||
| 750 | #2$aOncologic Nursing [Headings from MeSH] |
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Equivalent topical terms from different thesauri:
| 008/09 | a [established heading record] |
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| 008/11 | a [code indicating LCSH] |
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| 150 | ##$aDrill and minor tactics | ||||||||
| 750 | #7$aMilitary training$2lctgm [Heading from LC Thesaurus for Graphic materials] |
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| 008/09 | a [established heading record] |
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| 008/11 | z [code indicating other] |
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| 040 | ##$aDLC$cDLC$flctgm | ||||||||
| 150 | ##$aMilitary training | ||||||||
| 750 | #0$aDrill and minor tactics [Heading from LCSH] |
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Topical term used within a thesaurus both as an established heading and as a general subdivision:
| 008/09 | d [subdivision record] |
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| 008/11 | a [code indicating LCSH] |
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| 180 | ##$xUniforms | ||||||||
| 750 | #0$aUniforms$0 [record control number] | ||||||||
| 008/09 | a [established heading record] |
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| 008/11 | a [code indicating LCSH] |
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| 150 | ##$aUniforms | ||||||||
| 780 | #0$xUniforms$0 [record control number] | ||||||||
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