- https://help.apple.com/itunesu/sitemanager/#/itu337EEAE0-035A-4660-B53D-46A13A7721E5 (http://sitemanager.itunes.apple.com/help/#itu337EEAE0-035A-4660-B53D-46A13A7721E5)
- https://github.com/campusdomar/PuMuKIT2/blob/master/src/Pumukit/SchemaBundle/Resources/data/tags/itunesu_i18n.csv
- Old iTunes categories:
- 105 Humanities
- 105100 Humanities Communications (new 113 Communications & Media)
- 105101 Humanities Philosophy (new 114 Philosophy)
- 105102 Humanities Religion (new 115 Religion & Spirituality)
- 111100 African-American Studies (new 111107 African Studies and 111108 American Studies)
- http://unesdoc.unesco.org/images/0008/000829/082946eb.pdf
- https://en.wikipedia.org/wiki/UNESCO_nomenclature
- https://en.wikipedia.org/wiki/4-digit_UNESCO_Nomenclature
- https://en.wikipedia.org/wiki/6-digit_UNESCO_nomenclature
- http://www.idi.mineco.gob.es/portal/site/MICINN/menuitem.8ce192e94ba842bea3bc811001432ea0/?vgnextoid=363ac9487fb02210VgnVCM1000001d04140aRCRD&vgnextchannel=28fb282978ea0210VgnVCM1000001034e20aRCRD
- http://www.investigo.biblioteca.uvigo.es/xmlui/page/unesco
- https://github.com/campusdomar/PuMuKIT2/blob/master/src/Pumukit/SchemaBundle/Resources/data/tags/unesco_i18n.csv
- Only in gob.es:
- 530908: Trabajo Social y Servicios Sociales
- Taxonomy: https://en.wikipedia.org/wiki/Taxonomy_(general)
- (es) Taxonomía: https://es.wikipedia.org/wiki/Taxonom%C3%ADa
- Folksonomy: https://en.wikipedia.org/wiki/Folksonomy
- (es) Folcsonomía: https://es.wikipedia.org/wiki/Folcsonom%C3%ADa