1456 Open XML Paper Specification Text (Mark-up) Open XML Paper Specification (also referred to as OpenXPS) is an open specification for a page description language and a fixed-document format. 207 Walker Art Center / Walker Art Center 14 Jul 2014 This format can be identified via a container signature in DROID version 6 or later. The PRONOM database cannot currently represent container signatures; 08/2023 (v.113)- Added extension oxps. Submitted by Preservica. 14 Aug 2023 application/oxps MIME fmt/657 PUID xps File extension oxps File extension Has lower priority than 1630 3MF 3D Manufacturing Format Has lower priority than 1782 AutoCAD Design Web Format(DWFx)