test2-39.xml

关于XML和网页配合使用的好书

<?xml version="1.0" encoding="gb2312"?>
<!DOCTYPE entity [
   <!ENTITY el "<!ELEMENT">
   &el; entity (E_mail)>
   &el; E_mail (#PCDATA)>
]>
<entity>
   <E_mail>Adam@net_book.net</E_mail>
</entity>