[IPP] [Printing-architecture] CMD: field of device ID, which entry for PWG Raster?

[IPP] [Printing-architecture] CMD: field of device ID, which entry for PWG Raster?

[IPP] [Printing-architecture] CMD: field of device ID, which entry for PWG Raster?

Michael Sweet msweet at apple.com
Tue Nov 10 17:00:33 UTC 2015


Till,

It SHOULD be "PWGRaster" (as registered), but clients that are examining CMD values MUST compare as case-insensitive.  The SHOULD part is insurance because historically there have been client applications that don't do a case-insensitive comparison...


> On Nov 10, 2015, at 11:44 AM, Till Kamppeter <till.kamppeter at gmail.com> wrote:
> 
> Thank you very much, I have forwarded this to the manufacturer.
> 
> Does upper/lower case matter in the CMD: field? Or can I also use "PWGRASTER"?
> 
>   Till
> 
> On 11/10/2015 02:03 PM, Michael Sweet wrote:
>> Per PWG 5107.2:
>> 
>>    Conforming implementations of this specification SHOULD use IANA
>>    Printer MIB Interpreter Types (primary) or MIME Media Types
>>    (secondary) instead of private types, for interoperability.
>> 
>> 
>> The current IANA Printer MIB
>> (http://www.iana.org/assignments/ianaprinter-mib/ianaprinter-mib) has
>> the following:
>> 
>>    PrtInterpreterLangFamilyTC ::= TEXTUAL-CONVENTION
>>    ...
>>             langPWGRaster(84),   -- Not in RFC 1759
>>                                  -- PWG 5102.4: PWG Raster Format
>>                                  -- ftp://ftp.pwg.org/pub/pwg/candidates/
>>                                  --   cs-ippraster10-20120420-5102.4.pdf
>>                                  -- MIME type "image/pwg-raster"
>> 
>> which means that the CMD field SHOULD contain either 'PWGRaster'
>> (preferred) or 'image/pwg-raster'.
>> 
> 

_________________________________________________________
Michael Sweet, Senior Printing System Engineer



More information about the ipp mailing list