E04 — Commentator⧉

<?xml version="1.0" encoding="UTF-8"?>
<Product xmlns="http://ns.editeur.org/onix/3.0/reference">
  <DescriptiveDetail>
    <Contributor>
      <ContributorRole>E04</ContributorRole>
    </Contributor>
  </DescriptiveDetail>
</Product>

• Introduced in Issue 0 (or earlier)