Hi All,
I was able to implement the simple rule which will copy value from "Feature" implements "story", if label value in Feature is "nSt or activity-tracker or Algo".
Now my requirement is
1) story is already created
2) Feature is already created.
3)Linking existing Story with Feature [link type = implements ], then it should check if feature label is "nSt or activity-tracker or Algo" then only it should copy label from feature to story.