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

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

When encryption is enabled, the streams inside the PDF document are encrypted individually. If the encrypted result contains '{' or '}' symbols, FormatException ("Input string was not in a correct format.") is thrown.

An InvalidCastException is thrown when reading the Trailer.

The fix will be available in our latest LIB release (v. 2015.02.0810).

Add support for AES Encryption.
This item is migrated to the Telerik Document Processing portal: 
http://feedback.telerik.com/Project/184/Feedback/Details/190123 
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Add functionality for the ZipPackage to span across multiple files.
This item is migrated to the Telerik Document Processing portal: 
http://feedback.telerik.com/Project/184/Feedback/Details/190122 
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Exported <li> element contains inline style property "text-indent" with value -24px which causes the list item's text to be "under" the list item symbol.
This item is migrated to the Telerik Document Processing portal: 
http://feedback.telerik.com/Project/184/Feedback/Details/190041 
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This item is migrated to the Telerik Document Processing portal: 
http://feedback.telerik.com/Project/184/Feedback/Details/190049 
Please use the new item for commenting, voting and subscribing instead of this one.

This item is migrated to the Telerik Document Processing portal: 
http://feedback.telerik.com/Project/184/Feedback/Details/190068 
Please use the new item for commenting, voting and subscribing instead of this one.

Exporting docx document to PDF in which the width of the first column of the table is equal to the preferred width. This causes the word to be split into two lines. The width has to be equal to the word width so the word stays on a single row.
This item is migrated to the Telerik Document Processing portal: 
http://feedback.telerik.com/Project/184/Feedback/Details/190074 
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