# subject heading

> lexical unit of a thesaurus (word or phrase) used for indexing and that captures the essence of the topic of a document

**Wikidata**: [Q1128340](https://www.wikidata.org/wiki/Q1128340)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Index_term)  
**Source**: https://4ort.xyz/entity/subject-heading


## References

1. [Source](https://github.com/JohnMarkOckerbloom/ftl/blob/master/data/wikimap)
2. [Source](https://libguides.dickinson.edu/researchprocess/subjects)
3. [Source](https://nsufl.libguides.com/c.php?g=112492&p=725946)
4. [Source](https://edutechwiki.unige.ch/en/Subject_heading)
5. Freebase Data Dumps. 2013
6. Nuovo soggettario
7. [Source](https://books.google.com/ngrams/graph?content=subject+term%2Csubject+heading%2Cindex+term&year_start=1900&year_end=2019&corpus=26&smoothing=3)
8. [Source](https://libguides.usu.edu/subject_terms)
9. [Source](https://academicguides.waldenu.edu/library/subjectsandindex)
10. [Source](https://uhcl.libanswers.com/faq/164296)
11. [Source](https://webhost2.car.chula.ac.th/thaiccweb/)
12. Integrated Authority File
13. Dictionary of Archives Terminology
14. YSO-Wikidata mapping project. 2024
15. BabelNet
16. UMLS 2023
17. National Library of Israel
18. Wikibase TDKIV