Specifications

Official HTML standards and internet drafts.

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HTML Resources

Specifications

Human-readable

Machine-readable (DTDs)

A Document Type Definition (DTD) is a formal way of specifying the valid tags, attributes, entities, and relationships for a markup language in SGML syntax. DTDs can be used with validators and SGML-aware editors to create documents which conform to the HTML specifications. Below are links to all of the current DTDs for HTML. The ``strict'' versions of DTDs can be used to create documents which avoid the elements of a previous version of HTML that have since been deprecated.

Related Standards and Drafts

World Wide Web Specifications: The technical specifications for the World Wide Web are being developed by several Working Groups of the Internet Engineering Task Force (IETF), with support from the World Wide Web Consortium )W3C). This document provides a discussion of the evolving standards, including abstracts of and links to each of the the 50+ primary specification documents, along with links to related resources.