The usage of Column Wise Ntuples (CWN) in KLOE has started more than 3 years ago. You can find motivations and other discussion here:
The situation has evolved nicely in the last 3 years, Prod2ntu V3.0 ntuple is going to be used by the Ks/Kl/K and Radiative physics groups:
This page is preliminary and still under development !
S. Miscetti 30-May-2000
Mail to: Stefano.Miscetti@lnf.infn.it