IPP Mail Archive: IPP> IPP/IPPFAX telecon: IPPGET, Fri, Nov

IPP Mail Archive: IPP> IPP/IPPFAX telecon: IPPGET, Fri, Nov

IPP> IPP/IPPFAX telecon: IPPGET, Fri, Nov 2 and 9, 1-3PM EST (10-12 PS T)

From: Hastings, Tom N (hastings@cp10.es.xerox.com)
Date: Mon Oct 29 2001 - 15:32:47 EST

  • Next message: Hastings, Tom N: "IPP> RE: NOT - IPPGET Delivery Method ISSUE 01: Event Wait Mode for Jo b Creation operations"

    Since IPPGET is also an IPP Event Notification Delivery method, the first of
    the two telecons is for IPP and IPPFAX WG folks:

    Friday, Nov 2 and 9, 10-12 AM PDT (1-3 PM EDT)
    Phone: 1(712) 884-1555, (Xerox folks: 8*596-5170), passcode: 654970

    The agenda for Friday, Nov 2, will be the IPPGET Event Notification Delivery
    Method. We'll decide at the end of that telecon what the agenda will be for
    the next telecon the following Friday (November 9).

    The IPPFAX WG spent most of the meeting last week (10/24) on the IPPFAX
    Protocol document and finished reviewing it. We discussed the changes that
    John had made to the UIF document, but did not review those changes
    thoroughly. We did not address the IPP IPPGET Event Delivery Method
    document at all. We agreed to have two telecons, to address IPPGET and
    updated UIF and IPPFAX Protocol documents as well.

    Here is the mail that I sent out before the IPP FAX WG meeting. Since then
    there has been a lot of good email discussion about resolving issues 1 and

    We did discuss ISSUE 01 (adding Event Wait Mode) to Job Creation operations
    at the meeting. The sentiment was against. I'll send out a separate email
    message on that discussion.

    The current favored resolution to ISSUE 02 (IPPGET URL) on the DL would
    probably best require editing the IPP Event Notification Spec itself (which
    is still in the IESG queue) to add the "notify-put-method" (type2 keyword)
    Subscription Template attribute for pull methods which goes along with the
    "notify-recipient-uri" (uri) Subscription Template attribute for push
    methods. A Subscription object MUST have one or the other, but not both.

    Please send any comments on the agenda or the issues to both DLs.


    -----Original Message-----
    From: Hastings, Tom N [mailto:hastings@cp10.es.xerox.com]
    Sent: Friday, October 19, 2001 03:37
    To: ipp (E-mail); IPP FAX DL (E-mail)
    Subject: IFX> NOT - IPPGET Delivery Method down-loaded - REQUIRED for

    I've posted the updated IPPGET Event Notification Delivery Method that is


    The -rev version show the revisions since the July 17, 2001 version.

    It has all of the agreements reached at the August 1, IPP FAX meeting in
    Toronto and the subsequent 3 telecon, August 11, 14, and 17. See the
    telecon and meeting notes for the list of the changes.

    I'll send a .txt I-D later Friday. Please send any comments to the mailing
    list. We'll also review at the IPPFAX WG meeting, next Wednesday, October
    24 in San Antonio.

    There are two issues:

            ISSUE 01: Although we agreed to extend Job Creation operations to
    support Event Wait Mode, it seems to be an unnecessary complication, since
    the Printer MUST keep events for at least 15 seconds. So OK NOT to add the
    "notify-wait" (boolean) operation attribute to Job Creation operations and
    NOT have to have Job Creation responses return Event Notification Groups (in
    addition to returning Subscription Attribute Groups).

            ISSUE 02: How unique do we need the "notify-recipient-uri" (uri)
    URL now that the Printer doesn't use anything but the scheme in the URL to
    match on?

    Here are the major changes:

    1. Removed the "notify-recipients-uri" operation attribute from
    Get-Notifications, so no URI matching.

    2. Changed "notify-subscription-id" (integer(1:MAX)) to
    "notify-subscription-ids" (1setOf integer(1:MAX)); the client MUST supply
    with at least one value. Printer MUST support multiple-values.

    3. Added "notify-sequence-numbers" (1setOf integer(1:MAX)) to be parallel
    and be a floor to the Event Notifications sequence numbers returned. The
    client SHOULD supply. Printer MUST support multiple-values.

    4. In Event Wait Mode, each response is a full IPP response.

    5. Moved "notify-get-interval" back to the operations attributes group in
    the response.

    6. Added 'successful-ok-events-complete to indicate that there will be no
    more events for this Subscription object.

    7. The Printer MUST support Event Wait Mode.

    8. The client can end Event Wait Mode (without closing the connection) by
    sending "notify-wait" = 'false' any time. The Printer can end Event Wait
    Mode (without closing the connection) by returning "notify-get-internal"
    operation attribute any time (including immediately).

    9. Changed the lower limit for "ippget-event-life" from 1 to 15 seconds and
    recommend 60 seconds to agree with the PWG Job Monitoring MIB (RFC 2707).


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