(17)To adequately define the range of products to which this Regulation applies, the definition of ESG rating should be limited to opinions or scores, or a combination thereof, that are based on both an established methodology and a defined ranking system such as rating categories. For instance, the assignment of an item to a category or a scale that is either positive or negative, based on an established methodology with regard to environmental, social and human rights, or governance factors or with regard to exposure to risks, should be considered a ranking system for the purposes of this Regulation.