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

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

Anton Thomasson antonthomasson at gmail.com
Sat Oct 18 08:24:04 UTC 2025


Hi

30x90 will be centimeters, which is the every-day unit for small-ish things
in the rest of the world.
Nothing strange here, just SI/metric at work.

Br,
Anton

Den fre 17 okt. 2025 kl 23:30 skrev Michael Ziller via ipp <ipp at pwg.org>:

> 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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>
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