Thanks for your careful reading of these IPP specs.
We discussed this comment during the Thursday IPP WG session
at the PWG F2F meeting last week, when looking at IPP Scan with
The IPP F2F minutes state that this issue should be resolved on the
IPP mailing list, but there was unanimous consensus in the meeting:
(1) IPP FaxOut - these date-time attributes should remain REQUIRED
(because they satisfy regulatory requirements for a Fax service).
(2) IPP Scan - these date-time attributes should be changed to either
RECOMMENDED (i.e., best practice) or simply OPTIONAL.
Please note that in IPP Everywhere (PWG 5100.14), the attributes
printer-config-change-date-time and printer-state-change-date-time
attributes are REQUIRED in Table 6 for conformance (see notes 2
and 3 below the table).
Obviously, the underlying printer-date-time attribute should have
the same conformance level as the change-xxx attributes in IPP
Everywhere, IPP FaxOut, and IPP Scan. This appears to me to
be an oversight in these specs.
Please comment further on this thread, to clarify your thoughts.
- Ira (co-chair of IPP WG)
Ira McDonald (Musician / Software Architect)
Co-Chair - TCG Trusted Mobility Solutions WG
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
mailto: blueroofmusic at gmail.com
Winter 579 Park Place Saline, MI 48176 734-944-0094
Summer PO Box 221 Grand Marais, MI 49839 906-494-2434
On Tue, May 13, 2014 at 10:34 PM, Soma Meiyappan <
Soma.Meiyappan at conexant.com> wrote:
> Hi Pete et al,
>>>> I have a concern about
>>>> These attributes figure in the REQUIRED table in section 4.3. The above
> attributes require the scan device to have a notion of wall clock time
> (whether it is accurate or not to the global wall clock time). To increase
> the chances of making use of that effectively & correctly, all clients
> would be required to use this somehow in reference to printer-current-time
> and not to the wall-clock time that the client might know through other
> sources. That makes me wonder if it is sufficient to have
> printer-state-change-time and printer-config-change-time as required and
> make xxxx-date-time as optional.
>>>> I have a similar question on FaxOut; but at least on FaxOut, the devices
> are expected to have a notion of wall-clock time although the point about
> how clients should use that information with reference to
> printer-current-time still seems applicable.
>>>> *From:* ipp-bounces at pwg.org [mailto:ipp-bounces at pwg.org] *On Behalf Of *Zehler,
> *Sent:* Friday, May 09, 2014 10:35 PM
> *To:* IPP at pwg.org> *Subject:* [IPP] WG Last Call of IPP Scan Service specification
>> This message initiates the IPP Working Group last call of the IPP Scan
> Service specification updated per prototype experience and subsequent
>>>>ftp://ftp.pwg.org/pub/pwg/ipp/wd/wd-ippscan10-20140509.pdf>>http://ftp.pwg.org/pub/pwg/ipp/wd/wd-ippscan10-20140509.pdf>>>> Please send all feedback to the IPP mailing list (reply-all works fine for
> this) and it will be collected and processed as quickly as possible.
>> Our intent is to move IPP Scan Service to PWG Formal Vote before the
> August 2014 F2F.
>>>> Peter Zehler
>> Xerox Research Center Webster
> Email: Peter.Zehler at Xerox.com> Voice: (585) 265-8755
> FAX: (585) 265-7441
> US Mail: Peter Zehler
> Xerox Corp.
> 800 Phillips Rd.
> M/S 128-25E
> Webster NY, 14580-9701
> ipp mailing list
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