The Truth About HTML5 Forms
HTML5 forms are a neat example of HTML5’s history. The Architecture Astronauts at the W3C developed an XML-based replacement for HTML 4’s forms called XForms (http://en.wikipedia.org/wiki/XForms), which was a W3C candidate recommendation back in 2003. It was powerful but completely useless for the Web.
In late 2003 an alternative was proposed to extend, rather than replace, HTML 4’s forms (http://hixie.ch/specs/html/forms/xforms-basic-1). This became known as Web Forms 2.0 from the WHATWG and was eventually integrated into HTML5.
Note the timeframe: 2003.
The work the WHATWG was doing in the early- to mid-’00s ...