2681 PPTX Strict OOXML Presentation 2007 onwards Presentation PPTX Strict is the implementation of the Office Open XML presentation format that strictly conforms to the ISO 29500-1: 2008-2016 standard. 301 Danish National Archives / Danish National Archives 14 Feb 2023 This format can be identified via a container signature in DROID version 6 or later. The PRONOM database cannot currently represent container signatures. 14 Feb 2023 application/vnd.openxmlformats-officedocument.presentationml.presentation MIME fdd000402 Library of Congress Format Description Identifier fmt/1829 PUID pptx File extension Has priority over 941 Microsoft Powerpoint for Windows