copying attribute values from one workitem to another

Hi Naveen,

may not be that easy to implement but you could investigate these 2 directions :

1) Use a participant (a.k.a. "follow-up" action)
   See :
     - the Extensions Workshop ( https://jazz.net/library/article/1000)
     - the following blog post from Ralph Schoon (for an example showing how to update a parent or child W.I. when saving a work item) :
       http://rsjazz.wordpress.com/2012/07/31/rtc-update-parent-duration-estimation-and-effort-participant/

2) Use the HTTP filtered value provider and OSLC (to select the other work-item)
   See :
      - Jorge Diaz's blog post : http://jorgediazblog.wordpress.com/2012/06/27/work-item-customization-httpconector-and-oauth-in-rtc-4-0-for-oslc/
      - the wiki "Data Source Value Set Providers ": https://jazz.net/wiki/bin/view/Main/DataSourceValueSetProviders

   Note that you'd need to figure out the adhoc information to feed into the OSLC request.
 
Stéphane