Hi Shirley,
I found a couple of enhancements that are related to dependencies in RRC.  Do either of these features describe what you're looking for?  If not, I would suggest searching yourself, and if you don't see one, submit your own.  If you do submit an enhancement, it would also be a good idea to update this post with the link to the enhancement work item you create so others that come across this will find the work item easily.


Enhancement 73175 - Need a way to create dependent data types
https://jazz.net/jazz03/web/projects/Requirements%20Management#action=com.ibm.team.workitem.viewWorkItem&id=73175

Enhancement 44985 - Provide ability to define dynamic contents for attribute values - ie. calculated values / dependent values
https://jazz.net/jazz03/web/projects/Requirements%20Management#action=com.ibm.team.workitem.viewWorkItem&id=44985

I hope this helps.

The nearest-term solution may be to use JavaScript extensibility to do, though that's not the ideal way to do it, nor is scripting planned for general availability (a.k.a. production use) in this quarter's release. See the 4.0.5 plan items to learn more.