This includes loading form fields data from FDF file and saving the form fields data to FDF file.

This would ensure preserving the existing PDF file pages and document properties untouched and additionally would allow making a few modifications to the file. By appending bytes to existing PDF file one may achieve:

 - Modifying specific pages content and properties.
 - Adding new pages to pages collection.
 - Modify some document properties (such as Bookmarks).
 - Edit interactive forms field values.
 - Add digital signatures to existing documents.

Support for forms. The feature is named 'Interactive forms' in the PDF specification.

Main scenarios to consider:

- Reading of the data in the forms.

- Writing data to the forms.


Available in R2 2017 Release

The letters are disordered after the file is exported using PdfFormatProvider.

A NullReferenceException is thrown when trying to clone the Signature property of the field.

Available in LIB Version 2018.1.312.

Although this is not a valid postscript scenario we should not throw exceptions and we should instead skip the invalid dictionary end characters.

Fix available in LIB Version 2018.1.312.

In business or enterprises there is more and more demand for PDF/A-3.

In Germany it is Zugferd for hybrid invoices, in Brazil Nota Fiscal Eletronica 2.0, in France FACTUR-X.

Also for longterm preservation it is import to support PDF/A-3.

If I would be the PM of this library this would be my number one priority!

These images are defined directly in the PDF page content stream with BI and EI operators. Currently InvalidCastException is thrown when document with such images is imported.

Available in R1 2018 SP2 release version.

This happens only in cases when the Radio flag is not set and there are multiple widgets with different "ON" state names.

Available in R1 2018 SP2 version.

Encryption Algorithm 4 is implemented for R1 2018 official release. This includes all encryptions except AES 256 which is related to Encryption Algorithm 5. For AES 256 you may vote and follow this feedback item:
https://feedback.telerik.com/Project/184/Feedback/Details/240154-pdfprocessing-support-encryption-algorithm-5-with-aes-256

Currently RadPdfProcessing allows setting standard fonts using FontsRepository static properties.

However, in RadWordsProcessing font can be set only by specifying FontFamily, FontWeight and FontStyle. As there is no way to set standard fonts this way, API users cannot benefit from using these fonts which may help them achieve smaller PDF size as standard fonts may not be embedded. The same applies to RadSpreadhProcessing as well.

According to PDF specification, the resources used for the dynamic appearance of fields are defined globally in AcroForm "DR" PDF property. However, there are some invalid documents which define these resources locally in the field node which causes exception in PdfProcessing implementation. As there are several such documents we may consider handling such scenario instead of throwing the exception.

Available in R3 2017 SP1 Official Release.

This would allow to disallow some rows from splitting.

The field name should be preserved on an import-export scenario. However, in some cases when the field name contains non-ASCII characters then the field name is exported with different value compared to the imported one.

Fix available in LIB Version 2017.3.1009.

Currently, there is no way to know when a new page is created when content "overflows" to the next page 

This event may be needed in order to generate the header and footer based on the currently generated content. In simple header/footer scenarios, however, this event may not be needed and the headers and footers may be drawn after all pages are generated as described in the comments below.

When trying to create documents simultaneously from different threads (in concurrent scenario), different exceptions are thrown: 

- NullReferenceException in Telerik.Windows.Documents.Core.Fonts.OpenType.OpenTypeFontSource.ReadTableData[T](UInt32 tag, ReadTableFormatDelegate`1 readTableDelegate) method, 

- OverflowException in Telerik.Windows.Documents.Core.Fonts.OpenType.Tables.CMapFormat4Table.Read(OpenTypeFontReader reader) method.


Available in LIB version: 2017.2.814

System.Uri constructor throws UriFormatException when the text is some http address.

Available in LIB Version 2017.2.814.

The PDF format includes a general multimedia framework allowing users to insert and play/visualize different media types. The feature is described on page 755 from PDF Reference 1.7.

The current implementation expects the widths to be integer values and InvalidCastException is thrown when a real number is parsed.

Workaround: If the scenario allows, the PdfStreamWriter may be used instead of PdfFormatProvider. More information may be found in the following documentation article:
http://docs.telerik.com/devtools/document-processing/libraries/radpdfprocessing/formats-and-conversion/pdf/pdfstreamwriter/overview

Available in LIB Version 2017.2.731.

This is because PdfProcessing does not export Annotation Flags and this way all annotations has Print flag set to false.

Available in Release Version R2 2017 SP1.