Elm does not have built-in support for CSV parsing or generation; instead, third-party packages such as panosoft/elm-csv are often utilized.
panosoft/elm-csv
Elm treats JSON handling with explicitness and safety, primarily using the Json.Decode and Json.Encode modules.
Json.Decode
Json.Encode
Elm doesn’t have a built-in TOML parser, but you can interop with JavaScript or use a community package.
In Elm, you deal with XML using the elm/xml package.
elm/xml
To handle YAML in Elm, you typically need to convert YAML to JSON outside of Elm and then use Elm’s built-in JSON decoder functionality to work with the data.