How do you find the UUID for a repository workspace?
Accepted answer
I'm not aware of any exposure of the UUID in the Eclipse client (though it would be nice!).
You can get it from the web UI: just navigate to a workspace and then look at the address bar; the UUID of the workspace should be associated with the id parameter in the request.
You can also use scm -u list workspaces from the command line.
One other answer
Another alternative is to open the repository workspace editor (select the repository workspace in the Pending Changes view, right click, then run 'Open') and get the URI from the header (right click on the header and select 'Copy URL'):
The last segment of the URL is the UUID:
v--------------------gunk--------------------v v----------UUID-------v https://.../itemOid/com.ibm.team.scm.Workspace/_xplk552fEeSbz6D8OlERyw