Prism XML is a data format used in print publications - for example: you can arrange a layout in Adobe InDesign and upload it as prism xml in Copilot.

The Import Prism XML Feature allows editors to take a prism xml document and upload it into Copilot, whereupon we will read the story and convert it to markdown.

This tool is only visible in markdown mode and only a few US brands have this capability. Import Prism XML can be found Article content types right below the body after selecting markdown mode.