Thank you all for taking time to discuss this.
om_din-e4_280x400mm
DIN E4 envelopes – mailers, jiffy bags? – are still widely available in German stationery, but due to their bulky nature they are probably not often printed on directly; address label stickers are used instead in most offices. I’m not sure whether that passes the bar for common usage, hence registration.
om_can-pa4_210x280mm
I think paper trimmed to CAN PA4 size was hardly ever available in bulk, although the size is sometimes used in publishing. However, this (rounded) intersection of ISO A4 and ANSI A / CAN P4 “Letter” makes sense to have as a virtual print media size (for PDFs etc.) and therefore I was surprised to find it hasn’t been registered under any name yet, e.g. L4. I would prefer the three-letter ISO 3166 country ID since it coincides with the NSB acronym. However, again I’m uncertain whether that is enough to actually register it.
Weltformat, elongated sizes (whether ISO, GOST or other) etc. don’t seem relevant enough nowadays.
> Am 04.12.2025 um 22:16 schrieb Michael Sweet <msweet at msweet.org>:
> The results of our discussions during today's conference call yielded the following consensus for DIN E4:
>> om_din-e4-280x400mm
That second hyphen should be an underscore obviously.
> The general form of "om_SOURCE-NAME_WIDTHxLENGTHmm" and "oe_SOURCE-NAME_WIDTHxLENGTHin" can be used for any size from a source other than the existing prefixes (iso, na, prc, jpn, jis, etc.), where the "SOURCE" string is either the standard organization acronym or a 2 or 3 letter ISO country code. That would make the Canadian PA4 size "om_ca-pa4_210x280mm" (this is really the intersection of US Letter and ISO A4, which has been used and called other things including "universal letter"), and the Swiss Weltformat size "om_ch-weltformat-xiv_905x1280mm" or "om_ch-weltformat-xiv_895x1280mm".
>> The name portion does indeed allow for letters, numbers, dash (-), and period (.), so sizes like "iso_a1.0_594x1189mm" would indeed be allowed.
>> That said, there was not interest in registering size names for historical media that is not in common usage. If you feel these sizes *are* common enough, please provide a list based on the above guidance and we'll get the registration going.
>> Thanks!
>>>> On Dec 3, 2025, at 1:55 PM, Michael Sweet <msweet at msweet.org> wrote:
>>>> Christoph,
>>>> Let's discuss this during tomorrow's IPP WG concall. My inclination is for us to use the form "om_SOURCE-SIZENAME_WIDTHxLENGTHmm" and "oe_SOURCE-SIZENAME_WIDTHxLENGTHin" for metric and imperial dimensions going forward unless "SOURCE" is one of the existing prefixes, mainly because a) media size names are less important today because we have "media-col", and b) existing Client implementation that use size names might not recognize new prefixes ("disc" and "roll" still cause some confusion/issues after 12 years...)
>>>>>>>> On Dec 3, 2025, at 1:40 PM, Christoph Päper via ipp <ipp at pwg.org> wrote:
>>> Dear PWG
>>> The German standard DIN 678-1:1998-01 for envelope sizes, not fully obsoleted by DIN 476-2:2008-02 (which specifies the C series not part of ISO 216 = DIN 476-1), mentions a large size outside a series proper: E4 of 280 by 400 millimeters. If this were to be included as a media size self-describing name, which form would that take?
>>> om_e4_280x400mm
>>> om_din-e4_280x400mm
>>> om_germany-e4_280x400mm
>>> din_e4_280x400mm
>>> iso_e4_280x400mm
>>> deu_e4_280x400mm
>>> ger_e4_280x400mm
>>> deu_din-e4_280x400mm
>>> ger_din-e4_280x400mm
>>> Since the grammar in PWG MSN 2.1 section 5.1 only includes prefixes 'iso', 'jis', 'jpn', 'prc', 'om' and 'roll' for metric sizes, all but the first three and the fifth option probably disqualify, although the prose mentions that those are the "currently" defined classes of namespaces and jurisdictions. Since it is not part of an ISO standard, the fifth option is also out, but what if one wanted to add historic systematic sizes like 4A0, A11, A12, A13, B11, B12, B13 or the D series once specified in DIN 476?
>>> The original question boils down to: should there be a prefix before the label `e4` and should it give the standards body (DIN) or the country (Germany: DEU, GER)?
>>> Similarily, the Canadian compromise size PA4 from withdrawn national standard CAN2-200.2-M79 could probably be registered by one of the following media size names:
>>> om_pa4_210x280mm
>>> om_can-pa4_210x280mm
>>> om_canada-pa4_210x280mm
>>> Although no name currently seems to contain a dot '.' outside the dimensions, it seems to be allowed by the grammar for `base-name`. Elongated sizes specified by ISO 5457:1999 would therefore be, if someone wanted to register them:
>>> iso_a1.0_594x1189mm
>>> iso_a2.0_420x1189mm
>>> iso_a2.1_420x841mm
>>> iso_a3.0_297x1189mm
>>> iso_a3.1_297x841mm
>>> iso_a3.2_297x594mm
>>> Although the name "Weltformat" apparently is still in colloquial use in some national advertisment printing businesses, particularly in Switzerland, there is disagreement about the proper size. Original sources seem to have specified the only ever-relevant number 14 (or XIV in Roman numerals) of the 'world format' as 905 by 1280 millimeters, whereas APG/SGA co-lists its F4 size of 895 by 1280 millimeters under that name. Not considering sibling formats, this still leaves a plethora of options and I would not know which to choose:
>>> om_welt_905x1280mm
>>> om_welt-14_905x1280mm
>>> om_welt-xiv_905x1280mm
>>> om_weltformat_905x1280mm
>>> om_weltformat-14_905x1280mm
>>> om_weltformat-xiv_905x1280mm
>>> om_world_905x1280mm
>>> om_world-14_905x1280mm
>>> om_world-xiv_905x1280mm
>>> om_world-format_905x1280mm
>>> om_world-format-14_905x1280mm
>>> om_world-format-xiv_905x1280mm
>>> om_f4_895x1280mm
>>> om_swiss-f4_895x1280mm
>>> om_apg-f4_895x1280mm
>>> om_sga-f4_895x1280mm
>>> om_apgsga-f4_895x1280mm
>>> om_apg-sga-f4_895x1280mm
>>> _______________________________________________
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>>>ipp at pwg.org>>>https://www.pwg.org/mailman/listinfo/ipp>>>> ________________________
>> Michael Sweet
>> ________________________
> Michael Sweet