[IPP] [EXTERNAL] Media size issue for 10x15"

[IPP] [EXTERNAL] Media size issue for 10x15"

Michael Ziller mziller at microsoft.com
Fri Oct 17 21:29:50 UTC 2025


Thanks, I'll attend.

Also, how do these IANA namings make any sense?

	oe_photo-20x30_20x30in		- 20x30 as in inches
	om_photo-30x90_300x900mm		 - 30x90 as in ???

Is oN_photo-XxY just some shorthand which has no meaning in terms of units? 30x90 is not in inches, nor in mm.

-----Original Message-----
From: Michael Sweet <msweet at msweet.org> 
Sent: Friday, October 17, 2025 1:59 PM
To: Michael Ziller <mziller at microsoft.com>
Cc: ISTO-PWG Internet Printing Protocol workgroup discussion forum <ipp at pwg.org>
Subject: Re: [EXTERNAL] [IPP] Media size issue for 10x15"

Michael,

> On Oct 17, 2025, at 3:57 PM, Michael Ziller <mziller at microsoft.com> wrote:
> 
> But I thought IANA did not permit duplicate paper size registrations:
>        na_10x15_10x15in                - already IANA registered
>        oe_photo-s10r_10x15in           - not IANA registered, but in MSN2.1
> 
> So won't they reject registering oe_photo-s10r_10x15in?

They don't validate the registry beyond conformance to the XML schema, avoiding duplicate dimensions for media size names is our thing.

That said, what I see is that MSN 2.1 defined both of these sizes - na_10x15_10x15in is an envelope size and oe_photo-s10r_10x15in is a photo size.

Let's discuss this at the next IPP concall and I'll remove one of the sizes and mark it for removal from the next revision of MSN.

________________________
Michael Sweet



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