<?xml version="1.0" encoding="UTF-8"?>
<element name="patron" xmlns="http://relaxng.org/ns/structure/1.0">
  <interleave>
    <element name="name">
      <text/>
    </element>
    <element name="id-num">
      <text/>
    </element>
    <zeroOrMore>
      <element name="book">
        <choice>
          <attribute name="isbn"/>
          <attribute name="title"/>
        </choice>
      </element>
    </zeroOrMore>
  </interleave>
</element>
