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 Similarily, the Canadian compromise size PA4 from withdrawn national standard CAN2-200.2-M79 could probably be registered by one of the following media size names: om_pa4_210x280mm om_can-pa4_210x280mm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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