I've down loaded the updated "The 'ippget' Delivery Method for Event
Notifications" document. The versions with revisions are also in the .zip
file for next week's IPP WG meeting and are on the agenda.
The major change was to add the necessary material to be able to register
the 'ippget' scheme with IANA (see section 9). Also added client and
Printer conformance requirements for using the 'ippget' method (see section
11).
This document has been in the Area Director's queue since last August, so
this February 28, 2001 version will replace the November 16, 2000 version
according to the IETF procedures for this situation.
The files are at:
ftp://ftp.pwg.org/pub/pwg/ipp/new_NOT/ipp-notify-get-010228-rev.pdfftp://ftp.pwg.org/pub/pwg/ipp/new_NOT/ipp-notify-get-010228-rev.docftp://ftp.pwg.org/pub/pwg/ipp/new_NOT/ipp-notify-get-010228.pdfftp://ftp.pwg.org/pub/pwg/ipp/new_NOT/ipp-notify-get-010228.docftp://ftp.pwg.org/pub/pwg/ipp/new_NOT/ipp-notify-get-010228.txtftp://ftp.pwg.org/pub/pwg/ipp/new_NOT/draft-ietf-ipp-notify-get-02.txt
Here is the Abstract:
The notification extension document [ipp-ntfy] defines operations
that a client can perform in order to create Subscription Objects in a
Printer and carry out other operations on them. A Subscription Object
represents a Subscription abstraction. The Subscription Object specifies
that when one of the specified Events occurs, the Printer sends an
asynchronous Event Notification to the specified Notification Recipient via
the specified Delivery Method (i.e., protocol).
The notification extension document [ipp-ntfy] specifies that each
Delivery Method is defined in another document. This document is one such
document, and it specifies the 'ippget' delivery method.
The 'ippget' Delivery Method is a 'pull and push' Delivery Method.
That is, the Printer saves Event Notification for a period of time and
expects the Notification Recipient to fetch the Event Notifications (the
pull part). The Printer continues to send Event Notifications to the
Notification Recipient as Events occur (the push part) if the client has
selected the option to wait for additional Event Notifications.
When a Printer supports this Delivery Method, it holds each Event
Notification for an amount of time, called the Event Notification Lease
Time.
When a Notification Recipient wants to receive Event Notifications,
it performs an IPP operation called 'Get-Notifications', which this document
defines. This operation causes the Printer to return all Event Notifications
held for the Notification Recipient. If the Notification Recipient has
selected the option to wait for additional Event Notifications, the Printer
continues sending Event Notifications to the Notification Recipient as
additional Events occur.
Please send comments to the mailing list.
Thanks,
Tom