Glen,
Comments inline...
On Aug 21, 2012, at 11:13 AM, "Petrie, Glen" <glen.petrie at eitc.epson.com> wrote:
> Mike (all)
>> The change below pushes the burden to the printer (at an increased cost to the printer) while the Client, a software entity, has less burden. What is wrong with
>> 1. Discovery:
>> a. Clients MUST support DNS-SD and WS-Discovery
> b. Printers MUST support either DNS-SD or WS-Discovery and RECOMMENED to support both.
Pretty much all printers already support DNS-SD and WS-Discovery, which is why we opted to put the "burden" on the printers (since they already carry that burden).
> 2. Document Formats:
>> a. Clients MUST support both JPEG and PWG Raster
> b. Printers MUST support either JPEG or PWG Raster and RECOMMENDED to support both.
I personally would rather just see a single format (PWG Raster) be required since it is the only simple raster format that works for text, graphics, and photos. However, Justin objected to PWG Raster because Microsoft currently does not support it. Thus the "great compromise".
Many printers already support JPEG via dedicated hardware, and PWG Raster uses the same compression algorithm that is used by most vendor PDLs, so again I am not sure we are really increasing the burden for printers and the printer requirement to support both has been in the spec for over a year now...
> This change to the printer requirements could mean a faster time to market since printers are already support one of the discoveries and documents formats but may not support both discoveries and document formats.
I would argue that document formats and discovery protocols are not the hard parts - doing a GOOD implementation of IPP is much more difficult, as the interoperability reports can attest.
_________________________________________________________
Michael Sweet, Senior Printing System Engineer, PWG Chair
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