PDF Redaction: Addendum for the
PDF Reference, sixth edition, version 1.7
PDF Redaction: Addendum for the PDF Reference,
sixth edition,version 1.7
Copyright (c) 2006 Adobe Systems Incorporated. All rights reserved.
Redaction is the process of removing data from a page. With printed pages, redaction involves
blacking-out or cutting-out areas 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
This section describes content added to the PDF Reference.
● 8.4.5 Annotation Types summarizes a new entry added to Table 8.20. This table starts on page 615.
● Redaction Annotations describes the new annotation 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 note follows the heading 8.4.5, “Annotation Types” (Watermark Annotations) on page 1115.
8.4.5 Annotation Types
Table 8.20, Annotation types
MARKUP? DISCUSSED IN SECTION
(PDF 1.7) Redact annotation
“Redaction Annotations��� on page 2
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 be removed. Up until the next step is performed, the user can see, move and redefine these
2. Content removal. The user instructs the viewer application to apply the redact annotations, after which
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 are
removed from the PDF document.
PDF Redaction: Adden