Rebasing and merging in clear case

Question

While rebasing the development stream in clear case, there are some times where a file needs to be merged because the local version is out of sync with one in the recommended baseline.
Now intuitively, I was thinking that merge tool will offer two options :file 1(local) and file 2:(in recommended baseline).
But in reality, I am being asked to choose from 3 files. What are these 3 files?

Answer 1

The 3 files are:

• common ancestor (or "base contributor")
• source (or "source contributor")
• destination

This is a three-way merge. See "What are the basic clearcase concepts every developer should know?"

(and the fourth screen is the end result)

See also "How files and directories are merged"