<!--DOCTYPE report [-->
  <!ELEMENT report (section*)>
  <!ELEMENT section (section.title, section.content)>
  <!ELEMENT section.title  (#PCDATA)>
  <!ELEMENT section.content  (#PCDATA | anesthesia | prep | incision | action | observation )*>
  <!ELEMENT anesthesia (#PCDATA)>
  <!ELEMENT prep (#PCDATA | action)*>
  <!ELEMENT incision (#PCDATA | geography | instrument)*>
  <!ELEMENT action (#PCDATA | instrument )*>
  <!ELEMENT observation (#PCDATA)>
  <!ELEMENT geography (#PCDATA)>
  <!ELEMENT instrument (#PCDATA)>
<!--]-->