Bing found these results
Open XML Formats and file name extensions - Microsoft Support
Download The Microsoft Office Open XML Formats from Official …
Office Open XML - Wikipedia
Welcome to the Open XML SDK for Office | Microsoft Learn
Office Open XML file formats - Wikipedia
Understand when and how to use Office Open XML in your Word …
Getting started with the Open XML SDK | Microsoft Learn
Learn about file formats - Microsoft Support
Office Open XML - Apache OpenOffice Wiki
Introduction to Microsoft Office Open XML | Pluralsight
- Some results have been removed