C QA - Recommended list of Doctype declarations you can use in your Web document. Warning The list is informative and does not try to be exhaustive (there are many other proper declarations you could use), but it has most of the declarations commonly used on the Web at the moment. Recommended Doctype Declarations to use in your Web document. When authoring document is HTML or XHTML, it is important to Add a Doctype declaration. The doctype declaration must be exact (both in spelling and in case) to have the desired effect, which makes it sometimes difficult. To ease the work, below is a list of recommended doctype declarations that you can use in your Web documents. Template Use the following markup as a template to create a new XHTML 1.0 document using a proper Doctype declaration. <! (X)HTML Doctype Declarations List Strict Transitional Frameset Strict (quick reference) Transitional Frameset XHTML Basic 1.1 (quick reference): HTML 5 [NOT a standard yet] MathML Doctype Declarations MathML 2.0 - DTD: MathML 1.01 - DTD: Compound documents doctype declarations SVG 1.1 Full - DTD:
Fix Your Site With the Right DOCTYPE! You’ve done all the right stuff, but your site doesn’t look or work as it should in the latest browsers. Article Continues Below You’ve written valid XHTML and CSS. You’ve used the W3C standard Document Object Model (DOM) to manipulate dynamic page elements. Yet, in browsers designed to support these very standards, your site is failing. A faulty DOCTYPE is likely to blame. This little article will provide you with DOCTYPEs that work, and explain the practical, real–world effect of these seemingly abstract tags. WHY A DOCTYPE? Per HTML and XHTML standards, a DOCTYPE (short for “document type declaration”) informs the validator which version of (X)HTML you’re using, and must appear at the very top of every web page. As mentioned in previous ALA articles (and in other interesting places), DOCTYPES are also essential to the proper rendering and functioning of web documents in compliant browsers like Mozilla, IE5/Mac, and IE6/Win.
Clearly, this is not what you want. DOCTYPES THAT WORK#section3. Online Web Tutorials. HTML 4.01 Specification. Abstract This specification defines the HyperText Markup Language (HTML), the publishing language of the World Wide Web. This specification defines HTML 4.01, which is a subversion of HTML 4. In addition to the text, multimedia, and hyperlink features of the previous versions of HTML (HTML 3.2 [HTML32] and HTML 2.0 [RFC1866]), HTML 4 supports more multimedia options, scripting languages, style sheets, better printing facilities, and documents that are more accessible to users with disabilities. HTML 4 also takes great strides towards the internationalization of documents, with the goal of making the Web truly World Wide. HTML 4 is an SGML application conforming to International Standard ISO 8879 -- Standard Generalized Markup Language [ISO8879].
Status of this document This section describes the status of this document at the time of its publication. This document has been reviewed by W3C Members and other interested parties and has been endorsed by the Director as a W3C Recommendation. World Wide Web Consortium - Web Standards.