\[ **BT: [[knowledge]]** ] --- # library science - ↬ [Why You Should Fall To Your Knees and Worship a Librarian](https://librarianavengers.org/worship-2/) --- [[Classification is where things go (on the library shelf). Cataloguing is what we call things (i.e. subject headings, tags, etc).]][^1] ## classification systems *Library warrant*—i.e., how many books etc there are likely to be on any given topic—should be the foundation of developing a classification system.[^2] - Enumerative classification - Synthetic classification - Hierarchical classification Other considerations: - **generalities class** (e.g. general encyclopaedias, current affairs, etc) - **form classes** (e.g. for literature—poetry, drama, prose, etc) - **form divisions**—for subjects ‘presented in a particular bibliographic form’ such as dictionaries, periodicals, etc.[^3] [[When considering a classification system, ‘resources that are used together should be shelved together.’]][^4] ### Universal Decimal Classification (UDC) > ‘UDC is one of the most widely used classification schemes for all fields of knowledge. It is used in libraries, bibliographic, documentation and information services in over 130 countries around the world and is published in over 40 languages.’[^5] - **↬ external resources:** - [UDC Structure & Tables](https://udcc.org/index.php/site/page?view=about_structure) - [UDC Summary](https://udcsummary.info/) - [Universal Decimal Classification (Vocabulary Server)](https://vocabularyserver.com/udc/en/index.php) - [Collections indexed by UDC](https://udcc.org/index.php/site/page?view=collections) ### Dewey Decimal Classification (DDC) > [[‘In the print version of DDC, numbers are written in groups of three digits, with a space between each group—e.g., 344.063 635 1. This is done to make remembering and writing numbers easier.’]][^2] [[Some copy cataloguing sources show the segmentation of DDC numbers. This enables easier identification of the shorter numbers]][^3] - **↬ external resources:** - [Universal Decimal Classification (Vocabulary Server)](https://vocabularyserver.com/udc/en/index.php) --- ## cataloguing ### subject headings - see also: [[Homosaurus, n.d.|Homosaurus: An International LGBTQ+ Linked Data Vocabulary]] + ↬ **external resources:** + [Internship Diaries #3: Thesaurasize Me, Captain](https://musings.brimwats.com/blog/2020-03-05.ki-thesaurasize-me/) #### Library of Congress Subject Headings (LCSH) + [[LCSH’s ‘social life and customs’ vs ‘manners and customs’]] + [[LCSH subject headings (notes)]] - **↬ external resources:** - [Library of Congress Subject Headings search](https://id.loc.gov/authorities/subjects.html) — allows for heading search; results give BT (broader terms), NT (narrower terms), RT (related terms); as well as matches in other schema - [Library of Congress Authorities search](https://authorities.loc.gov/) — breaks things down in great detail; *very* worth using (albeit rather slow) - [Cataloging and Acquisitions](https://www.loc.gov/aba/) — Acquisitions and Bibliographic Access Directorate of the Library of Congress - [Internship Diaries #3: Thesaurasize Me, Captain](https://musings.brimwats.com/blog/2020-03-05.ki-thesaurasize-me/) - [Australian extension to Library of Congress Subject Headings](https://trove.nla.gov.au/australian-extension-library-congress) - [AIATSIS’s Place Thesaurus](https://aiatsis.gov.au/thesaurus?from=www1.aiatsis.gov.au) - [AUSTLANG (language and people authorities](https://aiatsis.gov.au/austlang/search) - [American Folklore Society Ethnographic Thesaurus](https://id.loc.gov/vocabulary/ethnographicTerms.html) [^1]: brimwats \[pseud.], ‘[[research notes/source notes/Watson, ‘Cataloging, Classification, Information Science, PKMs and YOU!’, 2020|Cataloging, Classification, Information Science, PKMs and YOU!]]’, Obsidian Forum, 16 December 2020, https://forum.obsidian.md/t/cataloging-classification-information-science-pkms-and-you/10071. [^2]: Lynn Farkas, *[[Farkas, Learn Dewey Decimal Classification, 2015|Learn Dewey Decimal Classification: International Edition]]*, 23rd ed. (Total Recall Publications, 2015), p. 10. [^3]: Lynn Farkas, *[[Farkas, Learn Dewey Decimal Classification, 2015|Learn Dewey Decimal Classification: International Edition]]*, 23rd ed. (Total Recall Publications, 2015), p. 10. [^4]: Lynn Farkas, *[[Farkas, Learn Dewey Decimal Classification, 2015|Learn Dewey Decimal Classification: International Edition]]*, 23rd ed. (Total Recall Publications, 2015), p. 1. [^5]: ‘Universal Decimal Classification’, *UDC Consortium*, accessed 19 December 2022, https://udcc.org/index.php/site/page?view=about.