IPP> Last Call Comment: Job and Printer time attributes shou ld be REQ

IPP> Last Call Comment: Job and Printer time attributes shou ld be REQ

IPP> Last Call Comment: Job and Printer time attributes shou ld be REQ

Zehler, Peter Peter.Zehler at usa.xerox.com
Tue Apr 27 13:24:05 EDT 1999


Carl,
There are many ways to get a pretty good time value.  From sniffing the HTTP
traffic to using a time server.  Printers can have their time set via a
console or web page.  They could ask
"http://tycho.usno.navy.mil/cgi-bin/timer.pl".  they could use a GPS
module...I hear they are getting pretty cheap.
I do not believe requiring dateTime attributes will be an undue burden on
printer implementations.  It will be useful to IPP client applications.
Pete

				Peter Zehler
				XEROX
				Xerox Architecture Center
				Email: Peter.Zehler at usa.xerox.com
				Voice:    (716) 265-8755
				FAX:      (716) 265-8792 
				US Mail: Peter Zehler
				        Xerox Corp.
				        800 Phillips Rd.
				        M/S 129-39B
				        Webster NY, 14580-9701



-----Original Message-----
From: kugler at us.ibm.com [mailto:kugler at us.ibm.com]
Sent: Tuesday, April 27, 1999 11:50 AM
To: ipp at pwg.org
Subject: Re: IPP> Last Call Comment: Job and Printer time attributes
should be REQ




> However, we could write the requirement such that the IPP/1.1 Printer
> implementation had to attempt to get the time by some means, such as
getting
> the time from a networked NTP Time server, from an incoming HTTP request
> (where it is always present),

I don't think you can count on that.  From draft-ietf-http-v11-spec-rev-06,
section 14.18 Date: "If the server does not have a clock that can provide a
reasonable approximation of the current time, its responses MUST NOT
include a Date header field.

   - Carl




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