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Initial Years
HTML went through a number of changes and extensions. Initially it was hosted at CERN, and then moved to IETF by '95. Link text -
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HTML 3.0
The W3C hosted began to host the HTML development. In '95-'97 HTML 3.0 was worked on and led to the final version as 3.2. Later in '97, however, HTML4 was created. Link text -
HTML4
Quickly after the publication of HTML 3.0, HTML4 was completed and put out within the same year. HTML4, however, was not used for too long before becoming a base for an XML based language. Link text -
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DOM
Parts of the API for HTML developed by browser vendors were published under the name DOM Level 1 then eveolved into DOM Level 2 Core and DOM Level 2 HTML. Some DOM Level 3 specifications published in 2004 but the group being closed before all the drafts were completed.Link text -
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XHTML
The W3C stopped evolving HTML and began on developing an XML-based equivalent. HTML4 was reformed to XML and this was known as XHTML 1.0. After the completion of XHTML 1.0, the W3C worked on a new language called XHTML2 which was not compatible with HTML or XHTML. Link text -
XFORMS
The publication of XFORMS sparked a renewed interest in evolving HTML. This was born from the realization that XML was limited. Link text -
Attempting to Re-Open HTML
In a 2004 W3C workshop, some of the groundwork of HTML5 was proposed, but large corporations wanted to stay with the XML based system. The proposal covered forms-related features and was presented to Mozilla and Opera. Link text -
WHATWG Creation
After the W3C workshop in 2004, Apple, Mozilla, and Opera announced their partnership in WHATWG. They worked on backwards compatablity mainly. Link text -
W3C Gets Invloved with HTML5
The W3C announced its interest to participate in the production of HTML5. A year later they got involved. Link text -
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HTML5
After years of working on HTML5, the W3C created a new group to work on HTML5 Recommendation in 2011. The WHATWG wanted to continue working on a "Living Standard" for HTML and the W3C wanted to stop adding features. Link text -
W3C and HTML5
The W3C formed a working group to partner with WHATWG. They worked on HTML5 specification. The specification was under the W3C copyright while Apple, Mozilla, and Opera kept a version with a less restrictive license. Link text -
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HTML5 to Present
There is a committee that was formed by the W3C that is working on maintaining HTML5. This same committee is working on the next version of HMTL. Patches have been rolling out consistently, 8152+.