This publication defines the format of the CSV file, which is used as the main way of inputting the core dataset into the NDTMS. It details the expected structure of each entity of an NDTMS record.
You don’t require a specific application to create the CSV file for the NDTMS system.
The NDTMS technical definitions document has further information.
Dataset N refers to the current version for national data collection, effective from 1 April 2017. Dataset O refers to future national data collection, effective from 1 April 2018.