Tiny, pretty unimportant clarification: Microsoft xlsx/docx/etcx files are OOXML. When Microsoft decided to emulate OpenOffice and create a XML-based doc format

Tiny, pretty unimportant clarification: Microsoft xlsx/docx/etcx files are OOXML. When Microsoft decided to emulate OpenOffice and create a XML-based doc format, they called it "Office Open XML" - or OOXML for short. OpenOffice, on the other hand, uses the XML-based Open Document Format (ODF) for its files by default. Confusing, yes, but there you are.