|First Indicator||Second Indicator|
# - Undefined
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
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.
Most of the content designators defined for field 748 are the same as those defined for field 148 (Heading-Chronological Term), field 448 (See From Tracing-Chronological Term), and field 548 (See Also From Tracing-Chronological Term). Description, guidelines, and input conventions for shared content designators are given in the X48 Chronological Terms-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 $4 (Relationship code) in field 748 are given in the 7XX Heading Linking Entries-General Information section.
|150||##$aWar of the Mascates, Brazil, 1710-1714|
|750||#0$aWar of the Mascates, Brazil, 1710-1714$0(DLC)sh#96009215#|
|750||#7$aWar of the Mascates$2fast$wna|
|150||##$aFurniture$zUnited States$xHistory$y19th century|
|150||##$aBull Run, 2nd Battle of, Va., 1862|
|750||##$aBull Run, 2nd Battle$wnb$2fast|