Microsoft Office XML formats

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.