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Dear Golan, Thanks for this information. What other devices besides the NexPress consume PPML/VDX? RE <<Today the PDF2PS in Acrobat can export these COS objects (XObjects) as PSForms into the PS stream (albeit it takes a long time and it's not perfect)>> What do you mean by "today"? Are you talking about Acrobat 5.x, or are you talking about Acrobat 6.x? - Cynthia ----- Original Message ----- From: "Golan Trevize" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, April 08, 2004 12:34 PM Subject: RE: [PDFdev] PDF files optimized for RIPping > > PDFdev is a service provided by PDFzone.com | http://www.pdfzone.com > _____________________________________________________________ > > Just for clarification NexPress is not the only VDX consumer. > > For me Optimized PDF means that for any recurring element only on COS object > is created. > > Variable Formats such as VPS can be easily converted to Optimized PDF or > VDX. > > Today the PDF2PS in Acrobat can export these COS objects (XObjects) as > PSForms into the PS stream (albeit it takes a long time and it's not > perfect), older versions of Acrobat sent multiple copies of the same object. > > For RIP performance I guess it will depend on how it uses XObjects, earlier > Adobe RIP's behaved just like the early Acrobat versions. > > Golan Trevize > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:owner- > > [EMAIL PROTECTED] On Behalf Of Cynthia Leslie > > Sent: Thursday, April 08, 2004 3:06 PM > > To: [EMAIL PROTECTED] > > Subject: [PDFdev] PDF files optimized for RIPping > > > > The term "optimized PDF file" has been bandied about for a couple of years > > in connection with printer/RIP performance. When people use this term in > > the context that I am focusing on here, they are referring to a PDF file > > that is constructed such that information that is common to all the pages > > is stored only once and referenced as needed. These kinds of PDF files are > > typically talked about in connection with variable-data- > > printing/publishing applications, which usually output a PDF file that > > contains a collection of documents that are similar but not identical. > > > > The idea is that if such a PDF file is sent to a printer/RIP that is > > designed to take advantage of the optimization, documents will print at or > > near rated print speed whereas they would print relatively slowly if the > > PDF file was not optimized (i.e., if it contained a lot of redundant > > information). > > > > One such optimizated PDF format is the PPML/VDX format, but I am NOT > > talking about that format, because (as far as I know) the only PPML/VDX- > > consuming device available today is the NexPress -- and I'm interested in > > an optimized PDF format that is designed for many RIPS/printers -- > > ideally, B&W devices and well as color devices. > > > > Note also that I am NOT talking about the linearized PDF format, which is > > optimized for Web viewing and is documented in Adobe's PDF Reference. > > > > What I am talking about is some other PDF format or formats that are > > generated by various software applications, typically variable-data- > > printing/publishing applications. > > > > My first question is this: when people talk about an optimized PDF file in > > this context, are they referring to a particular format that is documented > > somewhere? I have not been able to find any standard or specification for > > this. > > > > Also: I know that the kind of optimized PDF files that I'm talking about > > will only print at or near rated print speed on certain printers/RIPS that > > are designed to take advantage of such optimization. So my next question > > is: what printers/RIP are designed to take advantage of this kind of PDF > > optimization? Or, is it a matter of proprietary formats -- i.e., does an > > application have to generate a particular type of optimized PDF format for > > one printer/RIP, a different kind of optimized PDF format for another > > printer/RIP, etc.? > > > > BTW, I realize, of course, that there are lots of non-PDF print-stream > > formats that are designed to make certain printers/RIPS print as fast as > > possible (e.g., VPS, VIPP, FreeForm, etc.) -- but we have reasons for > > wanting to stick with a pure PDF workflow for a particular application > > that we are working on. > > > > Any and all replies and comments are welcome! > > > > - Cynthia Leslie > > > > > > > > > > > > > > To change your subscription: > http://www.pdfzone.com/discussions/lists-pdfdev.html > > To change your subscription: http://www.pdfzone.com/discussions/lists-pdfdev.html
