XML DTD

classroom.dtd

 

<?xml version="1.0" encoding="UTF-8"?>
<!ELEMENT classroom (cname,grade,student)>
<!ATTLIST classroom id ID #REQUIIRED/>
<!ELEMENT cname (#PCDATA)>
<!ELEMENT grade (#PCDATA)>
<!ELEMENT students (student+)>
<!ELEMENT student (id,name,age)>
<!ELEMENT id (#PCADA)>
<!ELEMENT name (#PCADA)>
<!ELEMENT age (#PCADA)>

 

classroom.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE classroom SYSTEM classroon.dtd>
<classroom id="c1">
 <cname>计算机1002班</cname>
 <grade>2012</grade>
 <students>
  <student>
   <id>11</id>
   <name>张三</name>
   <age>21</age>
  </student>
  <student>
   <id>12</id>
   <name>李四</name>
   <age>21</age>
  </student>
  <student>
   <id>13</id>
   <name>王五</name>
   <age>21</age>
  </student>
 </students>
</classroom>