The .udt.csv format is another representation of the .udt.json object that allows easier viewing and editing of data in spreadsheet software.
Check out this example .udt.csv file!
The UDT CSV format is capable of specifying all the same things as the UDT JSON format, but the UDT JSON format is the "canonical form" because the .udt.csv files are very flexible, and can be written in different but equivalent ways.
UDT CSV files are generating by converting the JSON format into a CSV using JSON as CSV (JAC). They can be converted back to JSON using the jac-format npm module or jac_format pip module.
The UDT CSV format is really easy to use with libraries like pandas.