<?xml version="1.0" standalone="yes"?>
<!DOCTYPE family [
  <!ELEMENT family (parent|child)*>
  <!ELEMENT parent (#PCDATA)>
  <!ELEMENT child (#PCDATA)>
]>
<family>
  <parent>Judy</parent>
  <parent>Layard</parent>
  <child>Jennifer</child>
  <child>Brendan</child>
</family>
