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"> 13