Link: http://syntext.com/products/serna/
Source Author or Organization: Syntext, Inc.

Syntext Serna Enterprise is a powerful and easy-to-use WYSIWYG XML editor for collaborative authoring of structured content. A variety of supported XML standards (such as DITA , S1000D, Docbook, and others) allows you to use Serna in virtually any industry - media or telecom, pharmaceutical or aerospace, semiconductor or software development. The open API available for C++ and Python scripting language together with cross-platform support gives boundless possibilities for embedding the functionality of Syntext Serna into any IT infrastructure.