mostly changes to Preface and Introduction chapters

spring-framework-reference/src/preface.xml

@@ -19,21 +19,18 @@
   parts of it that you need, without having to bring in the rest. You can use
   the IoC container, with Struts on top, but you could also choose to use just
   the <link linkend="orm-hibernate">Hibernate integration code</link> or the
-  <link linkend="jdbc-introduction">JDBC abstraction layer</link>. Spring has
-  been (and continues to be) designed to be non-intrusive, meaning
-  dependencies on the framework itself are generally none (or absolutely
-  minimal, depending on the area of use).</para>
+  <link linkend="jdbc-introduction">JDBC abstraction layer</link></para>
+
+  <para>Spring has been (and continues to be) designed to be non-intrusive,
+  meaning dependencies, from your domain logic code, on the framework itself
+  are generally none. For your integration layer like the data access layer
+  there will of course be some dependencies on the data access technology in
+  use and also on the Spring libraries, but these dependencies should be easy
+  to isolate from the rest of your code base.</para>
 
   <para>This document provides a reference guide to Spring's features. Since
   this document is still to be considered very much work-in-progress, if you
   have any requests or comments, please post them on the user mailing list or
-  on the support forums at <ulink
-  url="http://forum.springframework.org/" />.</para>
-
-  <para>Before we go on, a few words of gratitude are due to Christian Bauer
-  (of the <ulink url="http://www.hibernate.org/">Hibernate</ulink> team), who
-  prepared and adapted the DocBook-XSL software in order to be able to create
-  Hibernate's reference guide, thus also allowing us to create this one. Also
-  thanks to Russell Healy for doing an extensive and valuable review of some
-  of the material.</para>
+  on the support forums at <ulink url="http://forum.springsource.org/" />.
+  </para>
 </preface>