RVN is a serialization format based of Roc. Any Roc value is valid RVN.

This means you can serialize to and from files with contents like this:

{
    language: "Roc",
    tags: [Fast, Friendly, Functional],
    color: 0x7c38f5, # supports hex digits, comments too!
}

Many thanks for Luke Boswell for roc-json, which served as a great example showing how to write a library like this!