Then, for each group we study some specific properties which correspond to fields in SPCs (Summary of Product Characteristics), e.g. contraindications, and for each possible value in these domains we calculate the ratio of this value’s number of occurrences on the total number of elements of the group. We attribute the property, i.e., via a previously defined OWL property, to a concept when that ratio is above a predefined threshold. This step is semi-automatic, meaning that a health care professional supervises the results inferred and has the ability to overrule them.