hi, all, I'm new in this field. got one question when i read the book: Hibernate in Acion.

xml mapping file demonstrated in the book is:
<!DOCTYPE hibernate-mapping
PUBLIC "-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">

while in the source code for the book, it's :
<!DOCTYPE hibernate-mapping SYSTEM
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd" >

r they the same effect? Is there any different when i deploy my app?

cheers.

Not really.