[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
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