<?xml version="1.0" encoding="GB2312"?> 

<?xml-stylesheet type="text/xsl" href="students.xsl"?>

<!DOCTYPE students SYSTEM "students.dtd">

<students>
    <student>
        <name>張三</name>
        <age>18</age>
    </student>
    
    <student sn="02">
        <name>李四</name>
        <age>20</age>
    </student>
</students>