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PDF/A-1 Compliance Issues

For each PDF/A-1 validation issue we try to explain what it means and, if possible how to resolve it. For a more technical explanation of the issue we quote the related section of the ISO 19005-1 PDF/A Specification.

6.1
File Structure - General
6.1.2
File Header
6.1.3
File Trailer
6.1.4
Cross Reference Table
6.1.6
String Objects
6.1.7
Stream Objects
6.1.8
Indirect Objects
6.1.10
Filters
6.1.11
Embedded Files
6.1.12
Implementation Limits
6.1.13
Optional Content
6.2.2
Output Intent
6.2.3
Color Spaces - General
6.2.3.3
Uncalibrated Color Spaces
6.2.3.4
Separation and DeviceN Color Spaces
6.2.4
Images
6.2.5
Form XObjects
6.2.6
Reference XObjects
6.2.7
PostScript XObjects
6.2.8
Extended Graphics State
6.2.9
Rendering Intents
6.2.10
Content Streams
6.3.2
Font Types
6.3.3.1
General Font Issues
6.3.3.2
CIDFonts
6.3.3.3
CMaps
6.3.4
Embedded Font Programs
6.3.5
Font Subsets
6.3.6
Font Metrics
6.3.7
Character Encodings
6.3.8
Unicode Character Maps
6.4
Transparency
6.5.2
Annotation Types
6.5.3
Annotation Dictionaries
6.6.1
General Multimedia Content
6.6.2
Trigger Events
6.7
Metadata
6.7.2
Properties
6.7.3
Document Information Dictionary
6.7.5
XMP Header
6.7.8
Extension Schemas
6.7.9
Validation
6.7.11
Version and Conformance Level Identification
6.8.2.2
Mark information dictionary
6.8.3.3
Structure hierarchy
6.8.3.4
Structure types
6.9
Interactive Forms
TN0001
TechNote : Namespaces
TN0003
TechNote - Metadata
TN0008
Predefined XMP Properties
TN0008-2.2
XMP Basic Schema
TN0009
XMP Extension Schemas
TN0009-3.3
Unqualified RDF Attributes

Compliance Issue: Separation and DeviceN Color Spaces

What does this mean?

PDF/A requires device specific colour space parameters to insure that the document will render and output as close to the original colors as possible.

The document specifies CMYK colour space without CMYK output intent, specifies multiple colour spaces or the colour space in use is not correctly identified.

How can I fix it?

Use a PDF creation product that correctly identifies colour space. We recommend Solid PDF Creator Plus.

If you are working with a legacy document, simply open your PDF file in Solid PDF Tools and then File | Save As PDF/A. This will add or adjust the colour space used in your PDF/A file.

6.2.3.4 - ISO 19005-1 PDF/A Specification:

A conforming reader shall obey the following rules when rendering colour spaces based on DeviceN or Separation colour spaces.

-- If the named colourants in the colour space are all from the list Cyan, Magenta, Yellow, Black, the file has an OutputIntent, and that OutputIntent is a CMYK profile, then the colourants shall be treated as components of the colour space specified by the PDF/A-1 OutputIntent dictionary, as defined in 6.2.2, and the alternate colour space shall not be used.
-- If the output device does not support the Separation colour space or DeviceN colourants, the Alternate colour space shall be used.

The Alternate colour space of a Separation or DeviceN colour space shall obey all restrictions on colour spaces specified in 6.2.3.2 and 6.2.3.3.

 


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