Version 2.19 brings a number of new features, many revolving around the PDF Structure Tree. Often just called "Tags" in Acrobat, this is mainly used to make a PDF accessible for use with screen readers and other assistive technology. Our latest release improves support in this area considerably: documents with structure trees can be combined while preserving the structured; the structure tree can be retrieved as an XML document; and the the API can now create new documents that meet the requirements of PDF/UA and Section 508.
For more information please see the changelog.
You can download the latest version from our website.