<?xml version="1.0" encoding="utf-8" ?>

<!-- ELEMENT bookstore -->
<!ELEMENT bookstore (

<!-- ELEMENT book -->
<!ELEMENT book (

<!-- ELEMENT title -->
<!ELEMENT title >
<!--
lang: 
-->
<!ATTLIST title
  lang CDATA #IMPLIED >,

<!-- ELEMENT author -->
<!ELEMENT author ( #PCDATA ) >,

<!-- ELEMENT year -->
<!ELEMENT year ( #PCDATA ) >,

<!-- ELEMENT price -->
<!ELEMENT price ( #PCDATA ) >,

<!-- ELEMENT format -->
<!ELEMENT format ( #PCDATA ) >,

<!-- ELEMENT edition -->
<!ELEMENT edition ( #PCDATA ) >,

<!-- ELEMENT publisher -->
<!ELEMENT publisher ( #PCDATA ) >,

<!-- ELEMENT booklength -->
<!ELEMENT booklength ( #PCDATA ) > ) >
<!--
lang: 

category: 
-->
<!ATTLIST book
  lang CDATA #IMPLIED
  category CDATA #IMPLIED > ) >
<!--
lang: 

category: 
-->
<!ATTLIST bookstore
  lang CDATA #IMPLIED
  category CDATA #IMPLIED >