*** Welcome to piglix ***

Microsoft Office XML formats

WordProcessingML
Filename extension .XML (XML document)
Developed by Microsoft
Type of format Document file format
Extended from XML, DOC
DataDiagramingML
Filename extension .VDX (XML Drawing),
.VSX (XML Stencil),
.VTX (XML Template)
Developed by Microsoft
Type of format Diagramming vector graphics
Extended from XML, VSD, VSS, VST
SpreadsheetML
Filename extension .XML (XML Spreadsheet)
Developed by Microsoft
Type of format Spreadsheet
Extended from XML, XLS

The Microsoft Office XML formats are XML-based document formats (or XML schemas) introduced in versions of Microsoft Office prior to Office 2007. Microsoft Office XP introduced a new XML format for storing Excel spreadsheets and Office 2003 added an XML-based format for Word documents.

These formats were succeeded by Office Open XML (ECMA-376) in Microsoft Office 2007.

Besides differences in the schema, there are several other differences between the earlier Office XML schema formats and Office Open XML.


...
Wikipedia

...