1 <?xml version="1.0"?> 2 <!DOCTYPE note [ 3 <!ELEMENT note (to,from,heading,body)> 4 <!ELEMENT to (#PCDATA)> 5 <!ELEMENT from (#PCDATA)> 6 <!ELEMENT heading (#PCDATA)> 7 <!ELEMENT body (#PCDATA)> 8 ]> 9 <note xmlns:ar="http://www.xml.com/books"> 10 xmlns:br="http://www.abc.com"> 11 <to>Tove</to> 12 <ar:from>Jani</ar:from> 13 <br:from>Next</br:from> 14 <heading>Reminder</heading> 15 <body> weekend!</body> 16 </note>