[IPP] Finishings 2.0 and "trimming-offset" / "trimming-offset-supported"?

[IPP] Finishings 2.0 and "trimming-offset" / "trimming-offset-supported"?

[IPP] Finishings 2.0 and "trimming-offset" / "trimming-offset-supported"?

Michael Sweet msweet at apple.com
Mon Apr 6 17:04:57 UTC 2015


Smith,

I'll need to dig a bit to see which was intended, however the -supported syntax is designed to allow the printer to return both ranges and discrete values that might be supported.

The 1setOf syntax for trimming-offset would allow for multiple cuts from a single finishings-col value - useful for cutting business cards, for example - however I'm not sure how that would work for a printer.  Most of the cutters I've used on printers have been cross-cut (perpendicular to the feed direction, so top/bottom reference edge), with some providing a pair of cutters for the left/right (as the media exited the marking engine)...


> On Apr 1, 2015, at 11:54 PM, Kennedy, Smith (Wireless Architect) <smith.kennedy at hp.com> wrote:
> 
> Greetings,
> 
> In Finishings 2.0, I’ve been puzzling over the “trimming-offset” / “trimming-offset-supported” attribute definitions and their respective type declarations.  I see this on page 38:
> 
>   5.2.13.1 trimming-offset (1setOf integer(0:MAX))
> 
> but on page 49 in the IANA registrations and on the IANA ipp-registrations page, I find:
> 
>  trimming-offset (integer(0:MAX))    [PWG5100.1]
> 
> 
> I am assuming from the attribute definition that (integer (0:MAX) ) is the correct one?  If a Printer supported a set of values like “0,3-5, 8-15, 22”,  for “trimming-offset-supported”, then the definition of “trimming-offset-supported” on page 47 seems reasonable:
> 
>   6.26 trimming-offset-supported (1setOf (integer(0:MAX) | rangeOfInteger(0:MAX)))
> 
> Was this attribute definition’s type declaration done in this way to allow just such a range of values to be expressed?  Or is there something wrong with this type declaration as well?
> 
> Are there any others that don’t match?  (I didn’t check myself beyond these attributes.)
> 
> Smith
> 
> /**
>    Smith Kennedy
>    Hewlett-Packard Co.
> */
> 
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_________________________________________________________
Michael Sweet, Senior Printing System Engineer, PWG Chair



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