How to link a work item to a requirement collection?

Hi Team,

We are using RTC 6.0.1 .My client has this exact need - to be able to link a Collection directly to an RTC work item (i.e., not to the RTC Plan).  There will be multiple Collections for any given RTC Plan.  Just the link is what's needed (i.e., the ability to create plan items in RTC for all the requirements in the collection is not important here).

Users need the flexibility to be able to link a collection to a work item like Story or Epic.

Please help me .

Thanks in Advance,

Swapna Das