Chapter 4. XML Schema in XForms

"Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information on it."

Samuel Johnson

Forms and datatypes always seem to be mentioned together. It's natural to think of data entry in terms of specific types, such as date or phone number. Despite a feint in the opposite direction taken by earlier drafts, XForms incorporates the datatypes defined in W3C XML Schema. This chapter discusses these datatypes, and describes the general framework for describing and defining custom datatypes.