1 <?xml version="1.0"?>
   2 <!DOCTYPE note [                           
   3 <!ELEMENT note    (to,from,heading,body)>
   4 <!ELEMENT to      (#PCDATA)>
   5 <!NOTATION gs SYSTEM "http://who.knows.where/">
   6 
   7 
   8  <!NOTATION pubname PUBLIC "pubId">
   9 
  10 
  11  <!NOTATION comname PUBLIC "pubId" "sysId">
  12 
  13 
  14  <!NOTATION name SYSTEM "http://who.knows.where/">
  15 ]>                         
  16 <note>
  17 <to>lll</to>
  18 
  19 </note>