To open the XML file, you can use a third-party custom application for XML editing, or you can use Windows Notepad, which is included with each version of the Windows operating system.

1] Notepad. Opening an XFDL file in Notepad is a no-brainer. Right-click on the XFDL file, hover to “Open with” in the context menu, and select Notepad.

This is an attempt to port Microsoft's XML Notepad to build and run on Mono. (Specifically, I am using Mono 3.10 on Mac OS X "Mavericks" 10.9. And since it appears that in the official relase of 3.10, ...

If XML is the "new currency" for the Web, then Altova's XMLSPY is the money changer. Long recognized as the premier tool for editing XML, the latest version, XMLSPY 2004, has raised the standard ...