RDF (rotur data format) is a type restricted data storage format with inspirations from pkl.

Imagine if pkl, and osl formatting had a child, you would have rdf.

{
    string name = "Swallow"
    object job = {
        title = "Sr. Nest Maker";
        company = "Nests R Us";
        number yearsOfExperience = 2 where value > 1;
    }
}

{
  array<number> numbers = [] where each > 0;
  # array of numbers greater than 0
}

Optional typing and constraints built right in to the language will allowing you to interact with it through a simple js dot notations.