Editing W3C Markup Validation Service (section)

==History==
The Markup Validation Service began as ''The Kinder, Gentler HTML Validator'', a project by Gerald Oskoboiny.<ref name="w3.org_about"/> It was developed to be a more intuitive version of the first online HTML validator written by Dan Connolly and Mark Gaither, which was announced on July 13, 1994.<ref name="www-html_validator">{{cite mailing list|url=//lists.w3.org/Archives/Public/www-html/1994Jul/0015|title=ANNOUNCE: HaL Interactive HTML Validation Service|date=1994-07-13|access-date=2008-06-28|mailing-list=www-html|last= Connolly|first=Dan}}</ref>

In September 1997, Oskoboiny began working for the W3C, and on December 18, 1997, the W3C announced its ''W3C HTML Validator'' based upon his works.<ref name="oskoboiny_kgv">{{cite web |url=http://impressive.net/people/gerald/1996/ugweb/validate/changes.html |title=History of the Kinder, Gentler HTML Validator |access-date=2008-06-28 |first=Gerald |last=Oskoboiny |date=2003-03-22}}</ref> In November 2008, the W3C released the validator.nu HTML5 engine and the ability to check documents for conformance to HTML5.<ref>{{Cite web|url=https://validator.w3.org/whatsnew.html|title=What's New at The W3C Markup Validation Service|website=validator.w3.org|access-date=2016-05-31}}</ref>

W3C also offers validation tools for web technologies other than HTML/XHTML, such as [[CSS]], [[XML Schema (W3C)|XML schemas]], and [[MathML]].<ref name="W3C_CSS" />