[xep-support] PDF file sizes

From: Ivan Blair (Ivan.Blair@CODA.com)
Date: Fri Dec 05 2003 - 03:41:49 PST

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    I have a question about the PDF files that XEP produces.

    We have recently changed from building PDF files with FrameMaker to using XSLT stylesheets and XEP to perform the transformation sequence: XML to XSL:FO to PDF. Noticing that most of the PDF files produced by XEP were significantly larger that those produced using FrameMaker, we analysed samples from both sets of files using the Audit Space Usage function of Adobe Acrobat's PDF Consultant. One thing that struck us was the huge jump in the "Unknown" category in many files, from around 5% in the FrameMaker files to around 45% in the XEP files.

    On the other hand, in files which consist mostly of tables, XEP's "Unknown" category was much the same as FrameMaker's, and XEP used less space in other categories, so that these files were significantly smaller overall.

    Can you please shed any light on why, in general, XEP's PDF files devote such a large amount of space to this "Unknown" category, and whether there are any options that I can set to reduce the size of the files?

    We are using XEP Client version 3.4.2. We already set options to drop unused destinations and to embed just the used subsets of the fonts.


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