I use CSVY (CSV with YAML frontmatter) for my work. It is supported in R data.table fread()/fwrite(). It is just CSV with a little bit information on the top.

I use CSVY (CSV with YAML frontmatter) for my work. It is supported in R data.table fread()/fwrite(). It is just CSV with a little bit information on the top. Great for define column types, so that you reader does not need to guess the column types. See: https://csvy.org/ https://csvy.org/