JATS copyright-statement not read

[castedo]

REPO STEPS:

With the following jats.xml file:

<article>
  <front>
    <article-meta>
      <title-group>
        <article-title>Copyright Statement Test</article-title>
      </title-group>
      <permissions>
        <copyright-statement>© 2020, Smith</copyright-statement>
      </permissions>
    </article-meta>
  </front>
</article>

run

jats convert --frontmatter page jats.xml

GOT:
A jats.myst.json file with:

{
  "mdast": {
    "type": "root",
    "children": []
  },
  "frontmatter": {
    "title": "Copyright Statement Test",
    "abbreviations": {}
  }
}

EXPECTED:

{
  ...
  "frontmatter": {
    "title": "Copyright Statement Test",
    "copyright": "© 2023, Smith",
    ...
  }
}

COMMENTS:

The expected JSON above is consistent with the JSON export that results from running the mystmd CLI myst with YAML header inside markdown source file:

---
title: Copyright Statement Test
copyright: © 2023, Smith
---