XSLTForms/Additional functions

XSLTForms has implemented a number of functions beyond those required by the XForms specification. As of r638, these include:


 * alert
 * control-property
 * encode-for-uri
 * fromtostep a functional equivalent of the XPath 2.0  operator (  =  )
 * invalid-id
 * is-valid
 * itext (for text internationalization)
 * js-eval
 * selection
 * transform

There are separate pages for some of these. [And there should be separate pages for each of them.]