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PDF Redaction: Addendum for the PDF Reference, sixth edition, version 1.7

November 2006

PDF Redaction: Addendum for the PDF Reference, sixth edition,version 1.7
Copyright (c) 2006 AdobeSystems Incorporated. All rights reserved. November 2006

Introduction
Redaction is the process of removing data from a page. With printed pages, redaction involves blacking-out or cutting-outareas of the printed page. With electronic documents that use formats such as PDF, redaction involves removing (not just obscuring) content within a region.

Additions to the PDF Reference
Thissection describes content added to the PDF Reference.
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8.4.5 Annotation Types summarizes a new entry added to Table 8.20. This table starts on page 615. Redaction Annotations describes the newannotation type. It follows the description of the watermark annotation, which ends on page 647. H.3 Implementation Notes describes the implementation note mentioned in Redaction Annotations. This notefollows the heading 8.4.5, “Annotation Types” (Watermark Annotations) on page 1115.

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8.4.5 Annotation Types
Table 8.20, Annotation types
ANNOTATION TYPE Redact DESCRIPTION (PDF 1.7) Redactannotation MARKUP? Yes DISCUSSED IN SECTION “Redaction Annotations” on page 2

Redaction Annotations
A redaction annotation (PDF 1.7) identifies content that is intended to be removed from the document.The intent of redaction annotations is to enable the following process: 1. Content identification. A user applies redact annotations that specify the pieces or regions of content that should beremoved. Up until the next step is performed, the user can see, move and redefine these annotations. 2. Content removal. The user instructs the viewer application to apply the redact annotations, afterwhich the content in the area specified by the redact annotations is removed. In the removed content’s place, some marking appears to indicate the area has been redacted. Also, the redact annotations...