Release Notes: Support for PDF/A-2 and PDF/A-3 was completed. XAdES-EPES support has also been added. Some PDF/UA-related issues were fixed, including in iText RUPS, the tool for looking inside a PDF. Other improvements include the parsing functionality and an extra digital signatures feature that allows you to add information about the application that signed the PDF to the signature dictionary.
Release Notes: PdfCopy is finally able to merge AcroForm-based interactive PDFs. This is a huge step forward for people who want to merge accessible forms, preserving the accessibility. The PdfCopyFields class was deprecated. Unlike PdfCopy, this class allowed you to merge forms, but this didn't result in a tagged PDF: all structure was lost. iText now deals with some image types that previously weren't supported, and when confronted with an invalid PDF, throws a meaningful error.
Release Notes: Apart from many bugfixes, such as fixing a multithreading problem introduced in iText 5.3.5, this release focuses on the creation of structured PDFs. It's now possible to create PDFs that are automatically tagged when using iText's high-level objects such as Document, Paragraph, PdfPTable, etc. Tagged PDF is a first step towards better support for PDF/UA and PDF/A (level A) compliance.
Release Notes: Major changes were made with respect to verification and validation of digital signatures, more specifically for PAdES 4 (LTV) documents. Initial preparations were made for high-level support for Tagged PDF.
Release Notes: Most of the changes involve the digital signatures API which is documented in a white paper which will be released next week. This release fixes some bugs in PdfReader, PdfAWriter, and JPEG/TIFF handling. New functionality to allow page breaks at specific row numbers has been added to PdfPTable.