XForms is an XML application that represents the next generation of forms for the Web. XForms is not a free-standing document type, but is intended to be integrated into other markup languages, such as XHTML, ODF or SVG. An XForms-based web form gathers and processes XML data using an architecture that separates presentation, purpose and content. The underlying data of a form is organized into instances of data schema (though formal schema definitions are not required). An XForm allows processing of data to occur using three mechanisms: * a declarative model composed of formulae for data calculations and constraints, data type and other property declarations, and data submission parameters * a view layer composed of intent-based user interface controls * an imperative controller for orchestrating data manipulations, interactions between the model and view layers, and data submissions. Thus, XForms accommodates form component reuse, fosters strong data type validation, eliminates unnecessary round-trips to the server, offers device independence and reduces the need for scripting. XForms 1.1 refines the XML processing platform introduced by [XForms 1.0] by adding several new submission capabilities, action handlers, utility functions, user interface improvements, and helpful datatypes as well as a more powerful action processing facility, including conditional, iterated and background execution, the ability to manipulate data arbitrarily and to access event context information.

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W3C
W3C Recommendations

Boyer, J. M. (2007). XForms 1.1 candidate recommendation. W3C Recommendations. W3C.