MARC 21 Format for Authority Data: 748: Established Heading Linking Entry-Chronological Term (Network Development and MARC Standards Office, Library of Congress)

Chronological term that is equivalent to the 148 chronological term or 182 chronological subdivision heading field of the same record. It links headings within a system or from different thesauri or authority files.

See field 148 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 - Chronological term (NR)

$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

748

#7$a1710-1714$wna$2fast

748

#7$a1800-1899$wnb$2fast

748

#7$a1862$wnb$2fast

748 - Established Heading Linking Entry-Chronological Term (R)

Indicators

Subfield Codes

Examples