When creating the generic detector elements which do not need any specialised convertors, the classID assigned is 2. When creating specialized detector elements with specialized convertors (like DeRich1), a unique number needs to be assigned as a classID. The attachment below shows the classID's used until May2012 in LHCb. In order to ensure that the classID assigned is a unique number a convention is setup for the ranges of numbers that is recomended for each subdetector for this. They are as follows:

-- SajanEaso - 25-May-2012