The feature will be available in our official release Q2 2016.

The fix is available in our latest LIB release (v. 2015.1.0316)

From a custom function which inherit from FunctionBase it's possible to return some constant expressions like StringExpression or BoolExpression. But It's impossible to return a reference to a Cell or CellRange which will be used by another function by example or which will automatically update it's result.  There is no public constructor.

The feature will be available in our official release 2015 Q2. 

Transparency is not shown when we add png images.

The feature will be available in our official release Q1 2016.

Please add a link to the new TDP library and explain it, so people can find the place to vote for PDFProcessing!
http://feedback.telerik.com/Project/184/Feedback

According to http://www.digitalpreservation.gov/formats/fdd/fdd000251.shtml#sign there should be two elements in the XMP-metadata to indicate the PDF/A conformance level.

Here is an example:
<rdf:Description rdf:about="" xmlns:pdfaid="http://www.aiim.org/pdfa/ns/id/">
  <pdfaid:part>1</pdfaid:part>
  <pdfaid:conformance>B</pdfaid:conformance>
</rdf:Description>

or attribute version:

<rdf:Description rdf:about="" xmlns:pdfaid="http://www.aiim.org/pdfa/ns/id/" pdfaid:part="1" pdfaid:conformance="B" />

See also http://www.pdfa.org/wp-content/uploads/2011/08/tn0008_predefined_xmp_properties_in_pdfa-1_2008-03-20.pdf

and http://www.aiim.org/documents/standards/PDF-A/ISO19005AppNotes.pdf

The feature will be available in our official release 2015 Q2.

The feature will be available in our official release 2015 Q2.

Currently RadPdfProcessing imports Contents only from stream. In some documents Contents property may be PdfArray. 

Provide a way to convert flow formats (docx, HTML, RTF) to PDF.

Declined because the issue is originally caused by Form XObject missing functionality. You may subscribe for the following feedback item instead: http://feedback.telerik.com/Project/184/Feedback/Details/190108-implement-import-of-form-xobjects