Library of Congress >> MARC >> Authority >> 7XX >> 750

750 - Established Heading Linking Entry-Topical Term (R)

MARC 21 Authority - concise

December 2017

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.

See field 150 for descriptions of most content designators.

Indicators

First - Undefined: # - Undefined
Second - Thesaurus Thesaurus or authority file from which the heading came.: 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

$a - Topical term or geographic name entry element (NR)

$b - Topical term following geographic name entry element (NR)

$g - Miscellaneous information (R)

$i - Relationship information (R)

$v - Form subdivision (R)

$w - Control subfield (NR): See Heading Linking Entries--General Information; /0 - Link display; a - Link not displayed; b - Link not displayed, field 788 used; c - Link not displayed, non-7XX field used; n - Not applicable; /1 - Replacement complexity; a - Heading replacement does not require review; b - Heading replacement requires review; n - Not applicable

$x - General subdivision (R)

$y - Chronological subdivision (R)

$z - Geographic subdivision (R)

$0 - Authority record control number or standard number (R): See description of this subfield in Appendix A: Control Subfields.

$1 - Real World Object URI (R): See description of this subfield in Appendix A: Control Subfields.

$2 - Source of heading or term (NR): See Heading Linking Entries--General Information

$4 - Relationship (R): See Heading Linking Entries--General Information

$5 - Institution to which field applies (R): See description of this subfield in Appendix A: Control Subfields.

$6 - Linkage (NR): See description of this subfield in Appendix A: Control Subfields.

$8 - Field link and sequence number (R): See description of this subfield in Appendix A: Control Subfields.

Examples

750

#0$aCancer$xNursing

750	#2$aNeoplasms$xNursing
750	#2$aOncologic Nursing

750

#7$aMilitary training$2lctgm

750

#0$aDrill and minor tactics

750

#0$aUniforms$0 [record control number]

Library of Congress >> MARC >> Authority >> 7XX >> 750

(12/18/2017)