Bill,
> On Sep 1, 2017, at 10:37 AM, wamwagner at comcast.net wrote:
>> By quick skim, PDF/Raster appears to be the raster capability the exists within PDF, with some additional restrictions. Not quite sure why it requires a separate specification, except for the comment that it is the file format required by “TWAIN Working Group’s new TWAIN Direct specification -- the first zero-footprint, cloud-based version of its royalty free open standard protocol that allows applications to talk directly to document scanners without the need for vendor specific drivers.” That us the rub and would suggest that IPP Everwhere/Scan would have some very serious competition, if we ever formalized it. The scanner industry has a long history using TWAIN and, as in other areas, it will tend to continue with what is familiar. Still, a common imaging protocol for MFDs may find some support.
>> The IPP Scan Service spec appears to require that Scan Services support PDF. Modifying that to allow lower end devices to support a PDF subset not be a major effort and might have some benefit in showing some degree of universality. Is there any product that uses IPP Scan?
I can't answer that specifically, but given that IPP Scan requires PDF support and this is a strict PDF subset, there would be no problems supporting it in an IPP Scan implementation. We could even register this spec using a pdf-versions-supported keyword value - no spec updates needed.
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Michael Sweet, Senior Printing System Engineer