BBC NEWS | Technology | Microsoft adopts web file styles: "Attendees at the Tech-Ed 2005 conference will be the first to get more information... Some of Microsoft's competitors, such as Sun's StarOffice and the open source project OpenOffice, already support XML... when people use the 'Save As' option files in the XML format will have an 'x' added to the usual suffix. For instance Word documents saved in XML format will be labelled 'docx'."