Both GUDID (US) and EUDAMED (EU) databases have a field for describing a device model. In GUDID it is called "Device Description" and in EUDAMED it is called "Additional Product description". A catalog of device must be able to capture this description. 

Change requested on DeviceDefinition:

Add at the top level this element:

"description" 0..1 markdown, defined as "Additional information to describe the device".