GraphPad Prism is a program that combines scientific graphing and statistics for data analysis. The pzfx format can be opened only by GraphPad Prism 5 or later. The first part of the file contains all the data tables and info sheets in a plain-text XML format that can be viewed by other programs. After that there is information about results, graphs and layouts embedded in the XML as a binary format specific to the Prism application.