Hi, There has been a HN posting today concerning PID corrections by Chris Hearty, see http://babar-hn.slac.stanford.edu:5090/HyperNews/get/physAnal/1975.html It basically says, that for PID, tracking and neutral corrections we have to split the datasample into several subsets: PID: run1a, run1b, 2001, 2002, run3 and run4. Tracking: run 1a, run 1b, run2&3, and run4 Neutrals: run 1, run 2, run 3 and run 4 As discussed on Tuesday I have included the run period in the tcl filename (i.e. run1, run2, etc.). Now I'm wondering if we should subdivide the naming even further to facilitate the above mentioned corrections. I suggest the following naming scheme: run1a, run1b, run2a, run2b, run3 & run4 (2001) (2002) I can do this with BbkExpertTcl once I found out the exact definitions of the datasets and they are persistent. Is this a functionality people would like to have or would they apply the corrections rather on e.g. runnumbers? One drawback though, as Chris remarks "Unfortunately, signal MC is not available in such fine divisions right now." I'd quite like to get a consistent (and final) tcl naming scheme asap, which is not that easy as relevant information only becomes available now and things keep changing. And although we'll have to wait for xxx amount of time for the skimmed generic BB to become available I'd like to get the data and whatever is available for signal & cocktail MC out of the way asap (before the queues really fill up for summer, if that isn't already the case). If there're no other opinions I'll implement this and reproduce tcls once more. Cheers, Henning