title: There is a way to store a field between Post and Taxonomy
body: <p>I'm creating a site with WooCommerce. Each Product (in this case Books) can have an Author, a custom taxonomy that i made. But a Book could have multiple Authors with different roles each one (Compilator, Illustrator, Editor, etc.)</p>
  <p>There is a way to store the role field of the Author? Something like a double Select (one for the taxonomy Author and other for the role of the Author)</p>