The Artifact Summary page says:

Used to order DME and associated supplies (supports identification of the device by using DeviceRequest.code as a CodableConcept, DeviceRequest.code as a Reference to the Device Resource, or as a reference to DeviceDefintion by using the optional extension).

But the DeviceRequest profile doesn't seem to include the DeviceDefinition extension. Does that need to be added to the profile?

As well, the text contains a typo in "DeviceDefintion " which is missing an "i" in definition