XML小练习：外部DTD

文件名：dtd_2.dtd

<?xml version="1.0" encoding="UTF-8"?><!ELEMENT people (id, name, age, address)><!ELEMENT id (#PCDATA)><!ELEMENT name (#PCDATA)><!ELEMENT age (#PCDATA)><!ELEMENT address (#PCDATA)>

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文件名：dtd_2.xml

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE people SYSTEM "dtd_2.dtd"><people><id>06031</id><name>王川</name><age>19</age><address>广东汕头</address></people>