ODF Vs. OOXML
ODF(Open Document Format)
1. a simple XML file that uses as the root element, or 2. a ZIP compressed archive containing a number of files and directories
# .odt for word processing (text) documents
# .ods for spreadsheets
# .odp for presentations
# .odg for graphics
# .odf for formulae, mathematical equations
OOXML(MS.Office Open XML)
uses a ZIP container for packaging XML and other data files
# WordprocessingML for word processing documents
# SpreadsheetML for spreadsheets
# PresentationML for presentations
# DataDiagramingML for technical diagrams
# FormTemplate for electronic forms