<?xml version="1.0" encoding="UTF-8"?>
<!ELEMENT report (toc, chapter+)>
<!ELEMENT toc (tocitem+)>
<!ELEMENT tocitem EMPTY>
<!ELEMENT chapter (sentence*)>
<!ELEMENT sentence (#PCDATA)>
<!ATTLIST  tocitem chapter IDREF #REQUIRED>
<!ATTLIST  chapter 
id ID #REQUIRED
title CDATA #REQUIRED
>
<!ATTLIST sentence ref CDATA #IMPLIED>