25 lines
707 B
XML
25 lines
707 B
XML
<?xml version="1.0" encoding="utf-8" ?>
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<!--dtd约束文件的内部引入-->
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<!--<!DOCTYPE books [
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<!ELEMENT books (book+)>
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<!ELEMENT book (name,price,author)>
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<!ELEMENT name (#PCDATA)>
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<!ELEMENT price (#PCDATA)>
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<!ELEMENT author (#PCDATA)>
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<!ATTLIST book bid CDATA "check">
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]>-->
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<!--dtd约束文件的外部引入-->
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<!DOCTYPE books SYSTEM "books.dtd">
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<books>
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<book bid="j">
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<name>java入门到精通</name>
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<price>999</price>
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<author>小王</author>
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</book>
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<book bid="s">
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<name>数据库从删库到跑路</name>
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<price>666</price>
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<author>老王</author>
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</book>
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</books> |