Clone for each in XSLT

Hi All,
We all know we use for each when we want to read a array.
We also have another function called as clone for each in XSLT.
Suppose u have a scenario like u want to repeat a bunch of data,with only one of the field changing.
In my scenario i have a employee information,address of the employee for both permanent and present is the same,but i want to set the flag to true for permanent and flag set to false for present.
When i get the input i get the address only once,i am mapping it twice in the XSLT.
For this i used Clone for each,and set the flag to T for Permanent addr,and F for present.

Happy learning.