All common asset attributes types are defined and described within chapter 7.11.
Note to the optional property 2:DeviceClass applied from IMachineryItemVendorNameplateType defined in OPC 40001-1: OPC UA for Machinery: All asset types of this specification are defined as “Drive”. If a manufacturer creates its own subtype of PtAssetType to represent a component for which none of the defined subtypes of PtAssetType can be used, the new subtype should also use the DeviceClass “Drive”.
Note to the mandatory properties 2:Manufacturer and 2:SerialNumber: If there are assets where these values cannot be provided the use of a “empty string” is recommended.