I am generating mailpiece documents as PDF v1.4 from a document composition tool. I am using Enfocus Pitstop v10 (v10.1.7.27 to be exact) to remove some unneeded water marks from the produced document.
My issue is that I need to PRESERVE the original PDF structure as emitted from my composiiton tool and I'm finding that regardless how I proceed, Adobe Acrobat want to resave the PDF as v1.6 and apply a series of optimizations and compressions which alters the original PDF structure. The reason I need to preserve the strucure of thePDF is to confirm 508 compliance for the emitted PDF documents.
Note: I've tried various settings in Acrobat Distiller and the Adobe PD printer (thinking they are invoked somewhere inthe backgroud of Acrobat when it goes to save/save as...) but haven't experienced any progress...
Am I chasing a rabbit here (meaning what I want is NOT possible) or am I missing something in my configuration attempts??
If you need the final PDF to have the requisite well-formed structure tree (that is, compliant with ISO 14289-1, PDF/UA-1) and thus "accessible" then you need to do the adjustments to your PDF's content streams before establishing that well-formed structure tree.
Note that PDF versions 1.4 or above can have that well-formed structure tree - put another way PDF version 1.4 or PDF-1 (PDF is the ISO Standard ISO 32000-1) can have the well-formed structure tree. I can 'build' such a PDF that starts as PDF version 1.4 via Acrobat 5, do some additional post-processing with Acrobat XI Pro which, via a Save As puts the PDF into a new "version" and *not* adversely affect content streams / structure tree. Your post-processing is what is changing the "guts" not the save to a different version.
Just becaues - an obtw:
For those who desire to / need to provide accessible PDF success is predicated in having and understanding the essential reference material.
ISO 32000-1 (14.8 in particular).
Document Management – Portable Document Format – Part 1: PDF 1.7, First Edition
Adobe (Jul 2008)
This document is an ISO approved copy of the ISO 32000-1 Standards document. By agreement with ISO, Adobe Systems Incorporated is allowed to offer this version of the ISO standard as a free PDF file on their own Web site.
It is not an official ISO document but the technical content is identical; the page and section numbers are also preserved.
ISO 14289-1 (PDF/UA-1)
This you will have to purchase ($104) from the ANSI Web Store.
The Matterhorn Protocol.
The resources for Accessible PDF at the AIIM site.
PDF/UA-1 Technical Implementation Guide: Understanding ISO 14289-1 (PDF/UA-1)
PDF/UA-1 Technical Implementation Guide: Understanding ISO 32000-1 (PDF 1.7) (under development)
Achieving WCAG 2.0 with PDF/UA
(WCAG 2.0 for PDF IS PDF/UA-1)