<!ELEMENT BookStore (StoreName, Catalog)>
<!ELEMENT StoreName (#PCDATA)>
<!ELEMENT Catalog (Book+)>
<!ELEMENT Book (ISBN, Author+, Publisher, Edition, PublishDate, Price+,
                Cover, Status, Review+)>
<!ATTLIST Book Title CDATA #REQUIRED>
<!ATTLIST Book Type CDATA #REQUIRED>
<!ELEMENT ISBN (#PCDATA)>
<!ELEMENT Author (#PCDATA)>
<!ELEMENT Publisher (#PCDATA)>
<!ELEMENT Edition (#PCDATA)>
<!ELEMENT PublishDate (#PCDATA)>
<!ELEMENT Price (#PCDATA)>
<!ELEMENT Cover (#PCDATA)>
<!ELEMENT Status (#PCDATA)>
<!ELEMENT Review (#PCDATA)>