Desktop Products:

Process Automation:

Software Development:

 
PDF to Word Converter Customers
 

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: Transparency

What does this mean?

Values other than "{/None}" are prohibited for the key <<SMask>>
The key <<SMask>> is prohibited for PDF/A-1b
The key <<Group>> is prohibited for PDF/A-1b
Value "Multiply" is prohibited for the key <<BM>>
Value "1" for the key <<CA>> is required
Value "1" for the key <<ca>> is required

6.4 - ISO 19005-1 PDF/A Specification:

If an SMask key appears in an ExtGState or XObject dictionary, its value shall be None.

A Group object with an S key with a value of Transparency shall not be included in a form XObject.

The following keys, if present in an ExtGState object, shall have the values shown: -- BM Normal or Compatible -- CA 1.0 -- ca 1.0

NOTE: These provisions prohibit the use of transparency within a conforming file. The visual effect of partially transparent graphics can be achieved using techniques other than the use of the PDF Reference transparency keys, including pre-rendered data or flattened vector objects. The use of such techniques does not prevent a file from being PDF/A-1 conformant.

 


We use cookies on this site to enhance your user experience. By continuing to use this website you are giving consent to set cookies. Please see our privacy policy for more details.
©2000-2024 Solid Documents Limited - All Rights Reserved