book.dtd

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<?xml version="1.0" encoding="gb2312" ?>
<!--  图书信息的元素定义存放在"BOOK.DTD"文件中 -->
<!ELEMENT booklibrary (book*) >
<!ELEMENT book (title,author+,publisher,price)>
<!ELEMENT title (#PCDATA)>
<!ELEMENT author (#PCDATA)>
<!ELEMENT publisher (#PCDATA)>
<!ELEMENT price (#PCDATA)>
<!ATTLIST price moneytype (RMB|dollar) 'RMB'>