"Printers MUST support X or Y and SHOULD support both."
- Rich
Petrie, Glen 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.
>>>> 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.
>>>> 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.
>>>> As was discussed in the meeting, if either discovery or document format
> change in the future, the backward compatibility burden would have to be
> on the Client to deal with legacy printers. There 'may' be an issue of
> Client legacy but I content that is still easier to update Clients
> rather than printer firmware. In the event of a Cloud Print Service or
> a Print Manager; then, I would assume the "RECOMMEDED" support of both
> would be implemented.
>>>> Glen
>>>>>> ________________________________
>> From: ipp-bounces at pwg.org [mailto:ipp-bounces at pwg.org] On Behalf Of
> Michael Sweet
> Sent: Monday, August 20, 2012 6:42 PM
> To: ipp at pwg.org> Subject: [IPP] IPP Everywhere and "The Great Compromise"
>>>> All,
>>>> We discussed the PWG Last Call comments received thus far at today's IPP
> WG conference call. Two of the comments concerned the client
> requirements to support DNS-SD for discovery and both PWG Raster and
> JPEG for document formats. After over an hour of spirited debate, the
> following "great compromise" was proposed to resolve the last call
> comments:
>>>> 1. Discovery:
>>>> a. Printers MUST support both DNS-SD and WS-Discovery (adds
> WS-Discovery)
>> b. Clients MUST support at least one of DNS-SD and WS-Discovery
> (Clients can choose amongst the two required protocols)
>>>> 2. Document Formats:
>>>> a. Printers MUST support both JPEG and PWG Raster (no change)
>> b. Clients MUST support at least one of JPEG and PWG Raster (relaxes
> conformance - previously a Client had to support both)
>>>> Please comment on the proposed changes.
>>>> _________________________________________________________
> Michael Sweet, Senior Printing System Engineer, PWG Chair
>>>>>>> _______________________________________________
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