(28)Part B of the Annex to Directive 96/25/EC and columns 2 to 4 of the Annex to Directive 82/471/EEC contain lists of designations, descriptions and labelling provisions for certain feed materials. Those lists facilitate the exchange of information on the product properties between the producer and the purchaser. The experience of encouraging stakeholders to set voluntary standards by means of Community guidelines in the field of feed hygiene has been positive throughout. A more extensive listing could be achieved more flexibly, and could be better adapted to the information needs of the user, if undertaken by the stakeholders rather than by the legislator. The stakeholders can decide on the efforts they expend depending on the value of a list of feed materials. It is desirable, therefore, to establish a non-exhaustive Catalogue of feed materials to be used by feed business operators on a voluntary basis, except as regards use of the name of the feed material.