.ZFO File Extension
What is a ZFO file?
Online form that saves data in a standard XML format; also called an XSL-FO or XSL form; XSL-FO is a markup language that defines how the XML data is formatted; ZFO files are often used for online forms, such as registration forms; they can be filled out using the 602XML Filler.
Most XSL-FO forms use the .FO extension
Programs that open ZFO files
Software602 602XML Form Filler