<?xml version="1.0" encoding="UTF-8"?>

<!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)>