Monkeybread Software - DynaPDF Manual

DynaPDF Manual - Page 201

Function Reference

Page 201 of 839

• Embedded ICC profiles with a major version higher than 2. Version 4 profiles cannot be used

in PDF/A 1 files.

• PDF/A files cannot be encrypted. The usage of CloseFileEx() or CloseAndSignFileEx() is not

allowed.

• All features which are not defined in PDF 1.4.

PDF/A 2b, 2u, 3b, 3u

PDF/A 2b, 2u, 3b, 3u based on PDF 1.7 and hence support more features like transparency or

optional contents (layers). The only difference between PDF/A 2b and 3b is that the latter version

supports also embedded files. The following features are prohibited:

• Annotations which are not defined in PDF 1.7.

• Form fields (form fields will be flattened if present).

• Overprinting is permitted but the overprinting mode cannot be set to 1 if an ICCBased

CMYK color space is used. Due to implicit color conversion rules this applies also to

DeviceCMYK.

• Application events are prohibited in PDF/A 2 and 3 (see AddOCGToAppEvent() for further

information).

• Annotation replies are still prohibited (see SetAnnotMigrationState() for further

information).

• PDF/A files cannot be encrypted. The usage of CloseFileEx() or CloseAndSignFileEx() is not

allowed.

• PDF/A 3b: Embedded files must be associated with a PDF object. See AssociateEmbFile() for

further information.

PDF/A 4, 4e, 4f

PDF/A 4 files based on PDF 2.0. All three variants support embedded files but file attach

annotations are supported by PDF/A 4f only.

Main differences in comparison to PDF/A 3:

• The flag coFlushPages is not supported since the special color space handling requires a

cleanup run when closing the file. Links to color space resources must might be changed in

this run. This is only possible if parts of the document have not already been written to the

output file.

• Overprinting is fully supported.

• PDF/A 4e enables the usage of 3D contents in RichMedia annotations. Note that RichMedia

annotations based on Flash.