🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTürkçeРусскийالعربيةفارسی한국어中文日本語EntityQ212327· pop 32· linked from 141 articlesDocument Type DefinitionAlso known as DTDset of markup declarations that define a document type for an SGML-family markup languageWikidata factsShow 1 more factP13411Cervelle de canutSources (4)wikidata.orgdocs.openalex.orgweb.archive.orgpygments.orgvia Wikidata · CC0Available in 31 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةCatalanCroatianConnectionsExtensible HyperText Markup LanguageEntityUniform Resource IdentifierEntityCategoriesSGMLXML