<def-group>
  <definition class="compliance" id="usbguard_allow_hub" version="1">
    {{{ oval_metadata("Check that /etc/usbguard/rules.conf contains at least one non whitespace character and exists.") }}}
    <criteria comment="Check that /etc/usbguard/rules.conf contains at least one non whitespace character." operator="AND">
      <extend_definition comment="Check that /etc/usbguard/rules.conf contains at least one non whitespace character." definition_ref="usbguard_rules_not_empty_not_missing" />
    </criteria>
  </definition>
</def-group>
