?? book.dtd
字號:
<!-- DTD comment -->
<!ELEMENT bookcatalog (books)*>
<!ELEMENT book (title, author+,ISBN, publisher, publishyear, price)>
<!ELEMENT title (#PCDATA)>
<!ELEMENT author (firstname,lastname)>
<!ELEMENT ISBN (#PCDATA)>
<!ELEMENT publisher (#PCDATA)>
<!ELEMENT publishyear (#PCDATA)>
<!ELEMENT price (#PCDATA)>
<!ATTLIST price type (RMB|Dollar|Euro) #REQUIRED>
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