SharePoint Calculated field - Compare 3 Date columns

SharePoint Calculated field - Compare 3 Date columns
The logic
if ([Revised Due Date] = "")
set val = [Chartered Due Date]
else if([Chartered Due Date]="")
set val = [Requested Due Date]
else if([Requested Due Date]="")
set val =" NA")
the formulae
=IF(OR([Revised Due Date]<>"",[Chartered Due Date]<>"", [Requested Due Date]<>""), MAX([Revised Due Date],[Chartered Due Date]
,[Requested Due Date]), "NA")

Getting XML Data From a SharePoint List

http://%7b0%7d/_vti_bin/owssvr.dll?Cmd=Display&List={1}&View={2}&XMLDATA=TRUE

• {0} – The URL to your site.  This could be the root web or a child site.
• {1} – The GUID for your list. 
• {2}- The GUID of the view - optional