The NMD Data Mapping documentation describes each data element for NMD data submission, including valid values and data formats. The layout is divided into two sections
Transaction Header record (required)
Exam records (required)
There are separate mappings for each NMD version.
As of December 31, 2022, versions 2.0, 2.2, 3.0 and 3.4 are the only versions supported at this time.