+//
+//
+// 2.) Space points transformation:
+//
+// a.) General coordinate tranformation - AliTPCtransform (see $ALICE_ROOT/TPC/AliTPCtransform.cxx)
+// Created on fly - use the other calibration components
+// Unisochronity - (substract time0 - pad by pad)
+// Drift velocity - Currently common drift velocity - functionality of AliTPCParam
+// ExB effect
+// Simulation - Not used directly (the effects are applied one by one (see AliTPC::MakeSector)
+// Reconstruction -
+// AliTPCclustererMI::AddCluster
+// AliTPCtrackerMI::Transform
+// b.) ExB effect calibration -
+// classes (base class AliTPCExB, implementation- AliTPCExBExact.h AliTPCExBFirst.h)
+// a.a) Simulation: applied in the AliTPC::MakeSector -
+// calib->GetExB()->CorrectInverse(dxyz0,dxyz1);
+// a.b) Reconstruction -
+//
+// in AliTPCtransform::Correct() - called calib->GetExB()->Correct(dxyz0,dxyz1)
+//
+// 3.) cluster error, shape and Q parameterization
+//
+//
+//