A classification allows to dipatch data in a set of mutually exclusive categories defined by defines a set of criteria.
To avoid creating a classification that already exists or a classification that is very similar to another existing classification, please make sure to check the available classifications :
Classification Cashman GEPAN Hynek Hynek étendu 2 Hynek étendu 1 McCampbell Vallée
In case that your classification is not similar to any classification described above, you can start creating your own classification.