[IPP] First IPP Everywhere Self-Certified Printers !!!

[IPP] First IPP Everywhere Self-Certified Printers !!!

[IPP] First IPP Everywhere Self-Certified Printers !!!

Michael Sweet msweet at apple.com
Thu Oct 6 14:10:40 UTC 2016


> On Oct 5, 2016, at 4:03 PM, Ira McDonald <blueroofmusic at gmail.com> wrote:
> Hi,
> Per our brief discussion during today's IPP WG call, please consider
> Till's comments and feature request (IEEE 1284 DeviceID values for
> certified printers).   Please reply here on IPP mailing list and copy
> Till on your response.
> ...
> When only the last digit of the number differs, these are only variants with regional adaptations. The printer itself is the same but the power supply can be 110 V or 220 V, the power cord can be with different plug and the printers front panel (what is printed on the printer's shell) can be in different languages.
> So I would like to see the IEEE-1284 device IDs for that printers, as for listing them on OpenPrinting.org, there should be one printer entry per device ID.

While we did decide to require printer-device-id for IPP Everywhere, it was done for interoperability with legacy operating systems and print spoolers that use printer drivers - there is nothing in there that says "this is an IPP Everywhere Printer".  The closest you will get is to see "image/pwg-raster" or "PWGRaster" in the "CMD" field of the 1284 device ID, which indicates that the printer supports the required raster format for IPP Everywhere.  Clients know a printer supports IPP Everywhere by the presence of the 'ipp-everywhere' string in the "ipp-features-supported" Printer Description attribute.

So I don't see any point in adding the 1284 device ID to the IPP Everywhere printer database.  You only need it to match with a non-IPP Everywhere printer driver instead of the generic driver.

Michael Sweet, Senior Printing System Engineer

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