| <!ELEMENT document ANY> | |
| <!ELEMENT title (#PCDATA)> | |
| <!ELEMENT publisher (#PCDATA)> | |
| <!ELEMENT book (#PCDATA)> | |
| <!ELEMENT bookurn (#PCDATA)> | |
| <!ATTLIST book price CDATA "$100"> | |
| <!ATTLIST book author CDATA "Herold"> | |
| <!ATTLIST book number ID #REQUIRED> | |
| <!ATTLIST bookurn xmlns CDATA "10"> | |
| <!ATTLIST bookurn xmlns:isbn CDATA "10"> | |
| <!ENTITY w "William"> | |
| <!ENTITY s "Shakespeare"> |