01	Dewey	Dewey Decimal Classification. Code
02	Abridged Dewey	Code
03	LC classification	US Library of Congress classification. Code
04	LC subject heading	US Library of Congress subject heading. Text
05	NLM classification	US National Library of Medicine medical classification
06	MeSH heading	US National Library of Medicine Medical subject heading
07	NAL subject heading	US National Agricultural Library subject heading
08	AAT	Getty Art & Architecture Thesaurus heading
09	UDC	Universal Decimal Classification. Code
10	BISAC Subject Heading	BISAC Subject Headings are used in the North American market to categorize books based on topical content. They serve as a guideline for shelving books in physical stores and browsing books in online stores.
11	BISAC region code	A geographical qualifier used with a BISAC subject category. Code
12	BIC subject category	For all BIC subject codes and qualifiers, see http://www.bic.org.uk/subcats.html. Code
13	BIC geographical qualifier	Code
14	BIC language qualifier (language as subject)	Code
15	BIC time period qualifier	Code
16	BIC educational purpose qualifier	Code
17	BIC reading level & special interest qualifier	Code
18	DDC-Sachgruppen der Deutschen Nationalbibliografie	Used for German National Bibliography since 2004 (100 subjects). Is different from value 30.
19	LC fiction genre heading	Text
20	Keywords	Text
21	BIC children’s book marketing category	See http://www.bic.org.uk/cbmc.html. Code
22	BISAC Merchandising Theme	BISAC Merchandising Themes are used in addition to BISAC Subject Headings to denote an audience to which a work may be of particular appeal, a time of year or event for which a work may be especially appropriate, or to further describe fictional works that have been subject-coded by genre
23	Publisher’s own category code	Code
24	Proprietary subject scheme	As specified in <SubjectSchemeName>
25	Tabla de materias ISBN	Latin America. Code
26	Warengruppen-Systematik des deutschen Buchhandels	Code
27	Schlagwort-Normdatei (SWD)	Subject heading text
28	Thèmes Electre	Subject classification used by Electre (France). Code
29	CLIL	France. Code
30	DNB-Sachgruppen	Deutsche Bibliothek subject groups. Code. Used for German National Bibliography until 2003 (65 subjects). Is different from value 18.
31	NUGI	Nederlandse Uniforme Genre-Indeling (former Dutch book trade classification). Code
32	NUR	Nederlandstalige Uniforme Rubrieksindeling (Dutch book trade classification, from 2002). Code
33	ECPA Christian Book Category	ECPA Christian Product Category Book Codes, consisting of up to three x 3-letter blocks, for Super Category, Primary Category and Sub-Category. See http://www.ecpa.org/ECPA/cbacategories.xls. Code
34	SISO	Schema Indeling Systematische Catalogus Openbare Bibliotheken (Dutch library classification). Code
35	Korean Decimal Classification (KDC)	A modified Dewey Decimal Classification used in the Republic of Korea. Code
36	DDC 22 ger	Code. German Translation of DDC 22. Also known as DDC Deutsch 22
37	Bokgrupper	Norwegian book trade product categories (4701)
38	Varegrupper	Norwegian bookselling subject categories (4702)
39	Læreplaner	Norwegian school curriculum version (4703)
40	Nippon Decimal Classification	Japanese subject classification scheme. Code
41	BSQ	BookSelling Qualifier: Russian book trade classification. Code
42	ANELE Materias	Spain: subject coding scheme of the Asociación Nacional de Editores de Libros y Material de Enseñanza. Code
43	Skolefag	Norwegian primary and secondary school subject categories (4705)
44	Videregående	Norwegian list of categories used in higher secondary education and vocational training (4706)
45	Undervisningsmateriell	Norwegian list of categories for books and other material used in education (4707)
46	Norsk DDK	Norwegian version of Dewey Decimal Classification
47	Varugrupper	Swedish bookselling subject categories. Code
48	SAB	Swedish classification scheme. Text
49	Läromedel	Swedish bookselling educational subject. Code
50	Förhandsbeskrivning	Swedish publishers preliminary subject classification. Code
51	Spanish ISBN UDC subset	Controlled subset of UDC codes used by the Spanish ISBN Agency. Code
52	ECI subject categories	Subject categories defined by El Corte Inglés and used widely in the Spanish book trade. Code
53	Soggetto CCE	Classificazione commerciale editoriale (Italian book trade subject category based on BIC). Code
54	Qualificatore geografico CCE	Code
55	Qualificatore di lingua CCE	Code
56	Qualificatore di periodo storico CCE	Code
57	Qualificatore di livello scolastico CCE	Code
58	Qualificatore di età di lettura CCE	Code
59	VdS Bildungsmedien Fächer	Subject code list of the German association of educational media publishers
60	Fagkoder	Undervisningsdirektoratets fagkoder for kunnskapsløftet I videregående (Norwegian educational curriculum for secondary schools) (4708)
61	JEL classification	Journal of Economic Literature classification scheme
62	CSH	National Library of Canada subject heading (English)
63	RVM	Répertoire de vedettes-matière (Bibliothèque et Archives Canada et Bibliothèque de l'Université Laval) (French)
64	YSA	Yleinen suomalainen asiasanasto: Finnish General Thesaurus
65	Allärs	Allmän tesaurus på svenska: Swedish translation of the Finnish General Thesaurus
66	YKL	Yleisten kirjastojen luokitusjärjestelmä: Finnish Public Libraries Classification System
67	MUSA	Musiikin asiasanasto: Finnish Music Thesaurus
68	CILLA	Specialtesaurus för musik: Swedish translation of the Finnish Music Thesaurus
69	Kaunokki	Fiktiivisen aineiston asiasanasto: Finnish thesaurus for fiction
70	Bella	Specialtesaurus för fiktivt material: Swedish translation of the Finnish thesaurus for fiction
71	YSO	Yleinen suomalainen ontologia: Finnish General Upper Ontology
72	Paikkatieto ontologia	Finnish Place Ontology
73	Suomalainen kirja-alan luokitus	Finnish book trade categorisation
74	Sears	Sears List of Subject Headings
75	BIC E4L	BIC E4Libraries Category Headings