A document type declaration, or DOCTYPE, is an instruction that associates a particular XML or SGML document (for example, a web page) with a document type definition (DTD) (for …

A document type definition (DTD) is a specification file that contains a set of markup declarations that define a document type for an SGML -family markup language (GML, SGML, XML, HTML).

The original purpose of the doctype was to enable the parsing and validation of HTML documents by SGML tools based on the document type definition (DTD). The DTD to which the …

Doctype HTML is a declaration that tells the browser what version of HTML the document is written in. Some attribute types function differently when used to modify different element …

An SGML document may have three parts: the SGML Declaration, the Prologue, containing a DOCTYPE declaration with the various markup declarations that together make a Document …

An HTML element is a type of HTML (HyperText Markup Language) document component, one of several types of HTML nodes (some common node types include document, document …

A Formal Public Identifier (FPI) is a short piece of text with a particular structure that may be used to uniquely identify a product, specification or document. FPIs were introduced as part of …

HTML5 (Hypertext Markup Language 5) is a markup language used for structuring and presenting hypertext documents on the World Wide Web. It was the fifth and final [4] major HTML version …