1391 Microsoft Word Macro-Enabled Document Template 2007 onwards Word Processor From Microsoft Office 2007 onwards, the core output format of MS Word has been based on the Office Open XML (OOXML) file format. The ISO standard for OOXML is ISO/IEC DIS 29500. An OOXML file format consists of a compressed zip archive that is designated according to which file type it is. Further detail on OOXML can be found within fmt/189 - Microsoft Office Open XML. 1 Digital Preservation Department / The National Archives 12 Nov 2013 This file format is identified by container signature. 12 Nov 2013 application/vnd.ms-word.template.macroEnabled.12 MIME fmt/599 PUID dotm File extension Is subtype of 1160 Microsoft Word for Windows