<?xml version="1.0" encoding="GB2312" ?> 
<!DOCTYPE library[
    <!ELEMENT library (title,book*)>
    <!ELEMENT title (#PCDATA)>
    <!ELEMENT book (name,writer,publish)>
    <!ELEMENT name (#PCDATA)>   
    <!ELEMENT writer (#PCDATA)>
    <!ELEMENT publish (#PCDATA)>
 ]>
<adam:library xmlns:adam="http://www.adam.net/net-book">
    <title>阿當(dāng)網(wǎng)上書店</title>
    <book>
         <name>XML實(shí)例應(yīng)用大全</name>
         <writer>Adam</writer>
         <publish>清華電子讀物出版社</publish>
    </book>
</adam:library>