1 <!ELEMENT document ANY> 2 <!ELEMENT title (#PCDATA)> 3 <!ELEMENT publisher (#PCDATA)> 4 <!ELEMENT book (#PCDATA)> 5 <!ELEMENT bookurn (#PCDATA)> 6 <!ATTLIST book price CDATA "$100"> 7 <!ATTLIST book author CDATA "Herold"> 8 <!ATTLIST book number ID #REQUIRED> 9 <!ATTLIST bookurn xmlns CDATA "10"> 10 <!ATTLIST bookurn xmlns:isbn CDATA "10"> 11 <!ENTITY w "William"> 12 <!ENTITY s "Shakespeare">