UDIMagic - Ways of writing XML tags

A brief introduction to XML is given at http://www.rtslink.com/udimagic-xml-tags.html

There are two methods of writing XML tags for UDIMagic :-

1) In the Excel sheet itself (i.e. in the Comments section of Cell A1)
Refer the Exercise 1

2) In a plain text file
Refer the Exercise 2