xml-copy-editor-code/src/templates/RELAX_NG_grammar.rng

<?xml version="1.0" encoding="UTF-8"?>
<grammar xmlns="http://relaxng.org/ns/structure/1.0">
  <start>
    <element name="root">
      <zeroOrMore>
        <element name="element">
          <text/>
        </element>
      </zeroOrMore>
    </element>
  </start>
</grammar>