EntityQ212327· pop 32· linked from 141 articlesDocument Type DefinitionSign in to saveset of markup declarations that define a document type for an SGML-family markup languageConnectionsExtensible HyperText Markup LanguageEntityUniform Resource IdentifierEntityXML schemaEntityHTMLEntityInternational Standard Book NumberEntityQ698Entityweb browserEntityInternational Organization for StandardizationEntityXMLEntityInternet ExplorerEntityQ11255EntityQ2078EntityQ5289EntityGIFEntitymarkup languageEntitydenial-of-service attackEntitydata typeEntitySemantic WebEntityStandard Generalized Markup LanguageEntitytext fileEntityCategoriesSGMLXML