IPP>PRO - Print by reference

IPP>PRO - Print by reference

IPP>PRO - Print by reference

THERESA_RHOADES at HP-Boise-om8.om.hp.com THERESA_RHOADES at HP-Boise-om8.om.hp.com
Thu Jun 5 16:52:08 EDT 1997


     
     Carl,
     
     On 6/5/97 you wrote:
     >>an assumed restriction in the use of print-by-reference is that it 
     would initially only support the retrieval of documents in print ready 
     formats, such as Postscript or other PDL.
     
     What kind of driver requirements will this place on the source?  The 
     document provider will need to provide documents in every "print 
     ready" format that may exist at that time- PostScript, PCL, PCL-XL, 
     PDF, to name a few, and it will need to do this for every printer 
     because as we know, practially every printer has a different print 
     region, orientation, color space, etc. for which the specific PDL file 
     will need to be formatted.  This is basically why every printer has 
     it's own driver or PPD file in the first place.  If the owner of the 
     document is concerned about the fidelity of the document with which 
     they are trying to communicate information, this will place the burden 
     on them for determining what and how many print drivers they will need 
     to use.  
     
     This is a somewhat exaggerated example but either way, it seems the 
     requirement load for print by reference is going to have to increase 
     (and potentially skyrocket) somewhere, either on the printer, or on 
     the document provider.
     
     Theresa Rhoades
     Hewlett-Packard, Internet Solutions Operation 
     theresa_rhoades at hp.com
     
     




______________________________ Reply Separator _________________________________
Subject: RE: IPP>PRO - Print by reference
Author:  Non-HP-cmanros (cmanros at cp10.es.xerox.com) at HP-Boise,mimegw7
Date:    6/4/97 12:26 PM




At 10:00 AM 6/4/97 PDT, Stephen Holmstead wrote:
>Print by reference is REALLY tough for the printer to do.  Up until this 
>point, the printer only had to do http server capabilities (which can be 
>implemented fairly easily).  However, print by reference now would require 
>the printer to implement http client capabilities (which is HUGE!!, not to 
>mention how unstable the client features are and the fact that the printer 
>most likely won't ever have a flash upgrade).  What about all of the 
>embedded graphics files (gif, jpeg, pcx, tiff, etc.)?  Does the printer 
>have to have code to convert all of these to printable output?  What about 
>other files (.doc, .prz, .ppt, .xls, .mov, .avi, .pdf, etc.)?  Does the 
>printer have to have code to handle all of these?  What about plug-ins and 
>applets?  Does the printer have to have a Java Virtual Machine to run Java 
>applets?  The client (i.e. Browser) is quite large and has too many 
>features to be able to support by a printer.
>
>I have to strongly protest print by reference as it causes the requirement 
>load on the printer to skyrocket.
>--
>Stephen Holmstead
>Hewlett Packard Internet Solutions Operation 
>stephen_holmstead at hp.com
>
     
Stephen,
     
an assumed restriction in the use of print-by-reference is that it would 
initially only support the retrieval of documents in print ready formats, 
such as Postscript or other PDL. Also, like most other features in IPP, a 
particular printer does not have to support this functionality. However, 
there is an increasing demand for this feature, (for example in print on 
demand scenarios) so we certainly want to keep the option in the 
specification, for people who may want to implement it. The most likely 
protocol for the actual retrieval is more likely to be FTP rather than 
HTTP, but we do not see a good reason to put any restrictions in the 
standard for this.  Does this help you?
     
Carl-Uno
     
     
Carl-Uno Manros
Principal Engineer - Advanced Printing Standards - Xerox Corporation 
701 S. Aviation Blvd., El Segundo, CA, M/S: ESAE-231
Phone +1-310-333 8273, Fax +1-310-333 5514 
Email: manros at cp10.es.xerox.com



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