[Printing-architecture] Re: IPP> FW: Summary of PWG Document Object issues

[Michael Sweet <mike@easysw.com>]

McDonald, Ira wrote:
> Hi Tom,
> 
> I disagree entirely with your reasoning below.
> 
> The main purpose of PSI is print-by-reference.  If Send-URI
> remains OPTIONAL (and therefore rarely implemented and not
> interoperable) in IPP, then gateways based on FSG PAPI/1.0 
> interfaces between PSI and IPP transports will fail (unless
> the gateway fetches the referenced document, which introduces
> a different set of security issues).
> 
> This isn't a percentage kind of thing.  The most important
> operation in PSI is AddDocumentByReference.  All of the mobile
> scenarios depend on it.  Mobile devices _cannot_ fetch local
> copies of large documents, in order to use AddDocumentByValue.

Well, if mobile devices cannot fetch large documents (to display
them), then printing them is a bit useless, right?  Better to just
provide web-enabled applications for wireless devices to access
when they need to handle large documents.

The only operational scenario that I see where this would make *any*
sense is when viewing a large PDF file that has been linearized
("optimized") for the web, and even then you cannot have a proxy
between the client and server or none of the byte serving (which
allows a light-weight client to view the PDF file in pieces) will
work anyways.

I have yet to be convinced that print-by-reference is anything other
than a "gee wiz" feature.

-- 
______________________________________________________________________
Michael Sweet, Easy Software Products           mike at easysw dot com
Printing Software for UNIX                       http://www.easysw.com