🌐EnglishEnglishDeutschFrançaisРусский中文日本語EntityQ1307872· pop 6· linked from 108 articlesunit typetype allowing only one value in type theoryAvailable in 6 languagesFrançaisDeutsch中文Estonianwikifunctionsvia Wikidata sitelinks · CC0ConnectionssetEntityinitial and terminal objectsEntityCategoriesData typesType theory