This URI represents the namespace of the *OBSOLETE* XML form
submission data markup language originally proposed and defined in the
now *LONG DEFUNCT* Web Forms 2.0 specification.

For more information on the syntax of XML form submissions, see the
specification:

   http://www.whatwg.org/specs/web-forms/current-work/#x-www-form-xml

This format could also be used to seed forms, see:

   http://www.whatwg.org/specs/web-forms/current-work/#seeding

THIS NAMESPACE SHOULD NO LONGER BE USED.