[IPP] IPP Everywhere and "The Great Compromise"

[IPP] IPP Everywhere and "The Great Compromise"

Michael Sweet msweet at apple.com
Tue Aug 21 11:14:07 UTC 2012


Randy and Daniel,

I agree my wording for the client requirements still needs some polish - toss it up to writing it up late at night... How about:

    Clients MUST support DNS-SD and/or WS-Discovery.


(the math geek in me likes the intersection version below... :)

Sent from my iPad

On 2012-08-21, at 12:55 AM, Daniel Dressler <danieru.dressler at gmail.com> wrote:

> As a random bystander I can confirm that "one of X and Y" sounds a bit odd. Although the context does make it clear.
> 
> How about "Clients MUST support either DNS-SD or WS-Discovery or both" to eliminate any final confusion with English's exclusive or.
> 
> While I'm being usless let me also suggest another wording "The intersection between the set of client's supported protocols and the set {DNS-SD, WS-Discovery} must not be the empty set."
> 
> Daniel
> 
> 2012/8/20 Randy Turner <rturner at amalfisystems.com>
> 
>  i think I understand the compromise, although I would have worded 1b and 2b a little different
> 
> Clients MUST support either DNS-SD or WS-Discovery….
> 
> It's just a different use of a contraction
> 
> "…one of DNS-SD AND WS-Discovery"  seemed to use an AND contraction which implied both - someone might inadvertently parse this in a way we didn't expect….although I got the gist of the compromise.
> 
> R.
> 
> On Aug 20, 2012, at 9:16 PM, William A Wagner wrote:
> 
>> I think this is a practical and reasonable compromise. From at least my perspective, this does not put an unreasonable additional burden on printers while  making potentially easier for clients to achieve and claim compliance.
>> Bill Wagner
>>  
>> From: ipp-bounces at pwg.org [mailto:ipp-bounces at pwg.org] On Behalf Of Michael Sweet
>> Sent: Monday, August 20, 2012 9:42 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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