Add support for creating Tables and applying tables styles (predefined ones or custom).

Currently, this missing functionality may be workaround by either drawing the headers and footers with FixedContentEditor or by using RadWordsProcessing PDF export.

Implement repeating header row for tables when exporting with PdfFormatProvider.

A similar functionality can be achieved using the editing API of RadPdfProcessing. There is attached a project showing a sample implementation. More details are available in the forum post at http://www.telerik.com/forums/repeat-table-heading-after-page-break#kH616fyAKUiDl6WAknUILg

You can convert the document to PDF and use the approach bellow:

Currently, silent async printing may be achieved by using RadPdfViewer WPF control. Sample demo showing how to achieve this may be seen at the following forum post:
http://www.telerik.com/forums/pdfviewer-print-makes-ui-unresponsive#js0YdzFWc0Oa8C3g6a18lg

The RadPdfViewer WPF control used does not need to be displayed, making this demo a good workaround for ASP.NET AJAX clients.

At this point, the formatting can be applied only to the whole cell content.

These file formats are very similar to DOCX, and can be easily imported with loss of some information (e.g. macros).

Implement import of PDF to RadFlowDocument, using PdfFormatProvider. This would require text recognition (including determining where paragraphs end as opposed to new line inserted because of the layout) and table recognition.

This will allow conversion of PDF documents to docx, RTF and HTML.

Add support for pivot tables.

Allow customers to create, modify and convert .pptx files.

Implement functionality allowing to specify that when a table is split on multiple pages, a specific row should be shown on each page.

Workaround: in the attached demo projects.

PDF/A-1a is with conformance level A (for "accessibility"), and must adhere to all of the requirements of the PDF Reference as modified by the ISO 19005 specification. 

It requires structural and semantic properties to be preserved. Level 1a uses “Tagged PDF” and Unicode character maps to preserve the document's logical structure and content text stream in natural reading order. 

The following features are used:
- Language specification
- Hierarchical document structure
- Tagged text spans and descriptive text for images and symbols
- Character mappings to Unicode

The purpose is to improve accessibility and make the content accessible for screen readers.

For complienace level PDF/A-2a please follow: PdfProcessing: Add support for PDF/A-2a compliance level.

The currently supported compliance levels can be found in the How to Comply with PDF/A Standard article.

Allow to password-protect a workbook, so that it cannot be shown (read) without the password.

Introduce new section properties which are responsible for defining columns in the section.

Add support for horizontal lines in documents.

In DOCX, such lines are defined using the legacy VML definitions:
The definitions above and the <hr/> HTML tag are currently not supported and skipped on import, leading to missing horizontal lines in the document.

Take into account the table row's CanSplit property when exporting to PDF from RadFlowDocument model. Is set to false, the table row should not be split between two pages, if possible.

This property could be set to false, for example, when importing MS Word documents with "Allow row to break across pages" unchecked for some table rows.

Both properties table cell padding and table cell spacing are not exported to PDF format.

Form fields are the legacy way to insert an editable controls in a document (text boxes, checkboxes, dropdowns) by using the FORMTEXT, FORMCHECKBOX and FORMDROPDOWN fields.

Do not confuse with content controls (structured document tags) (see https://feedback.telerik.com/Project/184/Feedback/Details/190057 ) and with ActiveX controls.

Support conversion of XPS documents to PDF using RadPdfProcessing.

Currently, similar scenario may be achieved by converting Tiff images to BitmapSource and inserting them to RadFixedPage as images by using FixedContentEditor.
Note: A sample approach how to achieve such functionality is demonstrated in the Converting Multi-page TIFF Images to PDF KB article.