Relax NG

<?xml version="1.0" encoding="utf-8"?>
<element xmlns="http://relaxng.org/ns/structure/1.0"
         datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes"
         name="zamestnanci">
  <oneOrMore>
    <element name="zamestnanec">
      <attribute name="id">
        <data type="int"/>
      </attribute>
      <element name="jmeno">
        <data type="string"/>
      </element>
      <element name="prijmeni">
        <data type="string"/>
      </element>
      <oneOrMore>
        <element name="email">
          <data type="string"/>
        </element>
      </oneOrMore>
      <optional>
        <element name="plat">
          <data type="decimal"/>
        </element>
      </optional>
      <element name="narozen">
        <data type="date"/>
      </element>
    </element>
  </oneOrMore>
</element>