CSV on the Web (CSVW) is a W3C standard designed to enable the description of CSV files in a machine-readable way.[1]

"Use the CSV on the Web (CSVW) standard to add metadata to describe the contents and structure of comma-separated values (CSV) data files." — UK Government Digital Service[2][3]

[1] https://www.w3.org/TR/tabular-data-primer/

[2] https://www.gov.uk/government/publications/recommended-open-...

[3] https://csvw.org/