, .htm
Internet media type text/html
Type code TEXT
Uniform Type Identifier public.html
Developed by World Wide Web Consortium
Type of format Markup language
Extended from SGML
Extended to XHTML
Standard(s) W3C HTML 4.01
W3C HTML 3.2
HTML, an initialism of HyperText Markup Language, is the predominant markup language for Web pages. It provides a means to describe the structure of text-based information in a document — by denoting certain text as links, headings, paragraphs, lists, and so on — and to supplement that text with interactive forms, embedded images, and other objects. HTML is written in the form of tags, surrounded by angle brackets. HTML can also describe, to some degree, the appearance and semantics of a document, and can include embedded scripting language code (such as JavaScript) which can affect the behavior of Web browsers and other HTML processors.

Files and URLs containing HTML often have a .html or .htm filename extension.

Contents [hide]
1 History of HTML
1.1 Origins
1.2 First specifications
1.3 Version history of the standard
1.3.1 HTML version timeline
1.3.1.1 Drafts
1.3.2 XHTML versions
2 HTML markup
2.1 Elements
2.2 Attributes
2.3 Character and entity references
2.4 Data types
2.5 The Document Type Declaration
3 Semantic HTML
4 Delivery of HTML
4.1 HTTP
4.2 HTML e-mail
4.3 Naming conventions
5 Current flavors of HTML
5.1 SGML-based versus XML-based HTML
5.2 Transitional versus Strict
5.3 Frameset versus transitional
5.4 Summary of flavors
6 Hypertext features not in HTML
7 See also
8 References
9 External links
9.1 HTML Reference
9.2 HTML Tutorials
9.3 HTML Markup Validators
9.4 Standard HTML specifications
9.5 Other specifications