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 ...

Starting with Office 2007, Microsoft switched to Office Open XML (OOXML) as the default file formats for its applications. However, the legacy .doc (Word), .xls (Excel) and .ppt (PowerPoint ...

While Office 2010 could open and read Strict Open XML files, Office 2013 will allow users to write in that format for the first time. Office 2013 will also support Open Document Format (ODF ...

Open XML, on the other hand, is the new native file format for the primary applications within Office 2007, Microsoft's suite update. By mid-2007, WordPerfect will include open, view, and edit ...

What Is an XLSX File? A file with the XLSX file extension is a Microsoft Excel Open XML Format Spreadsheet file. It's a ...

"Office Open XML fulfills an important customer need - the file format was designed to be backward compatible with the content and functionality in billions of existing documents," Capossela wrote.