[IPP] media-size unit problem in rfc3382

[IPP] media-size unit problem in rfc3382

Michael R Sweet msweet at apple.com
Tue Nov 8 17:17:58 UTC 2011


Pete,

I'll post an errata for 3382.

Sent from my iPhone

On Nov 8, 2011, at 8:48 AM, "Zehler, Peter" <Peter.Zehler at xerox.com> wrote:

> Mike,
>  
> I know it’s confusing; it confused some people here.  One thing, other than the inconsistent differences, that contributed to their confusion was that RFC3382 was publish in September of 2002 and PWG5100.3 was published in February of 2001.  Their initial assumption was that newer spec should be correct.  They did not read the fine print in section 5 that indicates the definitions are informative.  Furthermore there is no reference, normative or informative, that points to the official definition.
>  
> I’d like to see the 6 mistakes in rfc3382 corrected.  It might also be a good idea to include at least an informative reference to PWG5100.3.
>  
> Pete
>  
>  
> Peter Zehler
> 
> Xerox Research Center Webster
> Email: Peter.Zehler at Xerox.com
> Voice: (585) 265-8755
> FAX: (585) 265-7441
> US Mail: Peter Zehler
> Xerox Corp.
> 800 Phillips Rd.
> M/S 128-25E
> Webster NY, 14580-9701
>  
> From: Michael Sweet [mailto:msweet at apple.com] 
> Sent: Tuesday, November 08, 2011 11:26 AM
> To: Zehler, Peter
> Subject: Re: [IPP] media-size unit problem in rfc3382
>  
> Pete,
>  
> The media-col definition in 3382 was informative and never registered.
>  
> (and yes this is confusing)
>  
> On Nov 8, 2011, at 4:31 AM, Zehler, Peter wrote:
> 
> 
> All,
> The units for media-size in rfc3382 are incorrect.  The examples in rfc3382 are inconsistent.  It is my understanding that current implementations from multiple vendors use hundredth of a millimeter.
>  
> Rfc3382:
> 3.1  4a – example is in mm
> 5.1.2.1 – defines units as inches
> 5.1.2.2 - defines units as inches
> 7.2 – example in inches
> Appendix A – example in inches
> Appendix B – example in inches
>  
> PWG5100.3:
> 3.13.8.1 - defines units as hundredths of a millimeter
> 3.13.8.1 - defines units as hundredths of a millimeter
> 3.13.8.3.1 - defines units as hundredths of a millimeter
> 3.13.8.3.2 - defines units as hundredths of a millimeter
>  
> PWG5105.1:
> 7.1 - defines units as hundredths of a millimeter (references 5100.3)
>  
> PWG5108.1:
> 4.3.1 – does not call out unit but references 5100.3
> 5.2.1 - defines units as hundredths of a millimeter (references 5100.3)
>  
>  
>  
>  
> Peter Zehler
> 
> Xerox Research Center Webster
> Email: Peter.Zehler at Xerox.com
> Voice: (585) 265-8755
> FAX: (585) 265-7441
> US Mail: Peter Zehler
> Xerox Corp.
> 800 Phillips Rd.
> M/S 128-25E
> Webster NY, 14580-9701
>  
> 
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>  
> __________________________________________________
> Michael Sweet, Senior Printing System Engineer, PWG Chair
>  

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