Features are a new concept in v2.14 and later that allows for behavior and state to be contained within the document or part. This is accessed via Features property on packages, parts, and elements.

The Open XML PowerTools provides guidance and example code for programming with Open XML Documents (DOCX, XLSX, and PPTX). It is based on, and extends the functionality of the Open XML SDK. Recently, ...

An XML-based file format developed by Microsoft and standardized by ECMA. Starting with Microsoft Office 2007, Office Open XML is the default document format for saving applications. See Office file ...