This project will develop an aid in the understanding and use of DTIF files. The application guide will provide information that will be an aid to users in developing tools such as pre-processors and post-processors of DTIF data, and other utilities. New IEEE Standard - Inactive-Reserved. An aid in the understanding and use of digital test interchange format (DTIF) files is provided in this guide. This information will be an aid to users in developing tools such as pre-processors and postprocessors of DTIF data and other utilities.