IEC 61987-1 defines a generic structure in which product features of industrial process measurement devices shall be arranged, in order to facilitate the understanding of product descriptions when they are transferred from one party to another. It applies to the production of catalogues supplied by the manufacturer of such devices and helps the user to formulate his requirements. IEC 61987-1 shall also serve as a reference document for all future standards which are concerned with process measuring equipment. In addition, IEC 61987-1 also provides a basic structure for the production of further standards listing the properties of process control equipment, for example, for actuators and infrastructure devices.