Ira,
I am on the printing-architecture list as well, and I responded that this is fine (we already do something similar to expose IEEE-1284 key/value pairs with the "usb_" prefix), and the advertisement is only available on the host since you can't directly share a local IPP-USB printer (which only understands "localhost").
> On Nov 13, 2024, at 8:55 AM, Ira McDonald <blueroofmusic at gmail.com> wrote:
>> Hi Mike,
>> [Forwarded from OP mailing list]
>> This looks questionable, from the point of interoperability. Comments to Alexander?
>> Cheers,
> - Ira
>> Ira McDonald (Musician / Software Architect)
> Chair - SAE Trust Anchors and Authentication TF
> Co-Chair - TCG Trusted Mobility Solutions WG
> Co-Chair - TCG Metadata Access Protocol SG
> Chair - Linux Foundation Open Printing WG
> Secretary - IEEE-ISTO Printer Working Group
> Co-Chair - IEEE-ISTO PWG Internet Printing Protocol WG
> IETF Designated Expert - IPP & Printer MIB
> Blue Roof Music / High North Inc
>http://sites.google.com/site/blueroofmusic>http://sites.google.com/site/highnorthinc> mailto: blueroofmusic at gmail.com> (permanent) PO Box 221 Grand Marais, MI 49839 906-494-2434
>>> ---------- Forwarded message ---------
> From: Alexander Pevzner <pzz at apevzner.com>
> Date: Wed, Nov 13, 2024 at 6:36 AM
> Subject: ipp-usb: exposing device serial number and vendor/device ID via TXT record
> To: Open Printing <printing-architecture at lists.linux-foundation.org>
>>> 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 (pzz at apevzner.com)
>>
________________________
Michael Sweet