Thanks - with your clarifications and revised attribute description,
I'm in favor of this new attribute.
Ira McDonald (Musician / Software Architect)
Chair - Linux Foundation Open Printing WG
Co-Chair - IEEE-ISTO PWG IPP WG
Co-Chair - TCG Hardcopy WG
IETF Designated Expert - IPP & Printer MIB
Blue Roof Music/High North Inc
mailto:blueroofmusic at gmail.com
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On Sun, Mar 20, 2011 at 5:14 PM, Michael Sweet <msweet at apple.com> wrote:
> On Mar 20, 2011, at 9:42 AM, Ira McDonald wrote:
>> Hi Mike,
>> I like this new attribute, but...
>> I think that the remediation info belongs locally in existing
> "printer-state-message" and "printer-alert-description"
> (mapped from Printer MIB remediation info), i.e., can be
> found without fetching an external web page.
>>> The simple instructions ("replace cyan ink") maybe, but the idea is that
> the printer can host a page that provides pictures, instructions, buttons to
> put the printer in "change ink mode" (many consumer inkjets have no physical
> buttons these days), print self-test pages, do head alignment, etc.
>> (This is traditionally stuff that is provided using vendor-specific
> software that is not easy to map to IPP operations and attributes. On the
> Mac we call these Printer Utility programs...)
>> While the how-to-order info may be appropriate in this new
> attribute, though I have seen it put in "printer-more-info"
> web page.
>>> The idea is that this would be specific to supply information and
> management and not the printer as a whole. Also, printer-more-info often
> points to the vendor's product web page and not the printer itself.
>> Or was your intent that this web page was served by the
> printer itself?
>>> Yes, otherwise it would be useless for many of our use cases.
>> I think that implementation would introduce
> freshness problems, i.e., distributors for resupply change
> over time.
>>> Redirect pages are cheap (and probably necessary to handle regional
> differences), and I would expect vendors to direct customers to their own
> online stores and not to some third party anyways.
>> In any case, the primary purpose is to handle stuff on the printer that is
> normally done with vendor-specific UI that cannot be easily mapped to IPP
> attributes or operations. Perhaps a better description would be:
>> printer-supply-info-uri (uri)
>> The RECOMMENDED "printer-supply-info-uri" Printer attribute provides
> a URI
> referring to a human-readable web page that provides controls
> for managing
> the Printer and its supplies, e.g., supply replacement, head alignment,
> self-test pages, and so forth. The web page MAY also provide supply
> numbers, links for ordering supplies, and detailed instructions for
> replacing supplies.
>> The URI MUST use the “http” or “https” scheme with the printer as the
> destination host - external URIs are not allowed.
> Michael Sweet, Senior Printing System Engineer, PWG Chair
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