ipp-usb: exposing device serial number and vendor/device ID via TXT record

Hi!

I want to be able to match devices, exported by the ipp-usb, with the 
underlying USB devices, because every second user asks "where is my 
newly connected USB printer?" and needs to be pointed to the list of the 
network printers.

For this purpose I want to add a couple of parameters to the TXT record, 
published by the ipp-usb:

     usb_SER=VCF9192281  ; Device serial number
     usb_HWID=0482&069d  ; Its vendor and device ID

However, if there are already standard names defined for this purpose, 
I'd prefer to follow the standard. Please, point me to the right 
direction at this case.

WDYT?

-- 

	Wishes, Alexander Pevzner ([email protected])