diff --git a/src/docbkx/index.xml b/src/docbkx/index.xml
index 66bf90cd1..f2eb0ba79 100644
--- a/src/docbkx/index.xml
+++ b/src/docbkx/index.xml
@@ -88,8 +88,8 @@
         <title>Reference</title>
         <partintro>
             <para>
-                This is the reference part of the book. It has information about the programming model, APIs,
-                concepts, and annotations of Spring Data Graph.
+                This is the reference part of the book. It has information about the
+                programming model, APIs, concepts, and annotations of Spring Data Graph.
             </para>
         </partintro>
 
diff --git a/src/docbkx/reference/preface.xml b/src/docbkx/reference/preface.xml
index 48ff8b9c3..67c09055a 100644
--- a/src/docbkx/reference/preface.xml
+++ b/src/docbkx/reference/preface.xml
@@ -2,19 +2,17 @@
 <!DOCTYPE preface PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
 "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
 <preface id="reference:preface">
-  <title>Preface</title>
-
-  <para>The Spring Data Graph project applies core Spring concepts to the development of solutions using a graph style data store. 
-	 The basic approach is to mark simple POJO entities with Spring Data Graph annotations. That enables the AspectJ aspects that are contained
-	 with the framework to adapt the instantiation and field access to have them stored and retrieved from the graph store.
-	 Entities are mapped to nodes of the graph, references to other entities are represented by relationships. There are also
-	 special relationship entities that provide access to the properties of graph relationships.
-  </para>
-  <para>
-	For the developer of a Spring Data Graph backed application only the public annotations
-      (<xref linkend="reference:programming_model:annotations"/>) and the additional,
-    added entity methods (<xref linkend="reference:programming-model:introduced-methods"/>) are relevant.
-    Basic knowledge of graph stores is needed to access advanced functionality like traversals.
-    Traversal results can also be mapped to fields of entities.
-  </para>
+    <title>Preface</title>
+    <para>
+        The Spring Data Graph project, as part of the Spring Data initiative, aims to simplify development
+        with graph databases. Like JPA, it uses annotations on simple POJO beans. The annotations activate
+        the AspectJ aspects in the Spring Data Graph framework, mapping the POJO entities and their fields
+        to nodes, relationships, and properties in the graph database.
+    </para>
+    <para>
+        To get started with a simple application, only the basic annotations
+        (see <xref linkend="reference:programming-model:annotations"/>) and the additional aspect-introduced
+        entity methods (see <xref linkend="reference:programming-model:introduced-methods"/>) are required.
+        Basic knowledge of graph stores is needed to access advanced functionality like traversals.
+    </para>
 </preface>
diff --git a/src/docbkx/reference/programming-model/node-entities.xml b/src/docbkx/reference/programming-model/node-entities.xml
index 538254fd3..d6b5075a3 100644
--- a/src/docbkx/reference/programming-model/node-entities.xml
+++ b/src/docbkx/reference/programming-model/node-entities.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
-<section id="reference:programming_model:annotations">
+<section id="reference:programming-model:annotations">
     <title>Annotations define POJO node entities</title>
     <para>Entities are declared using the <code>@NodeEntity</code> annotation.
         Relationship entities use the <code>@RelationshipEntity</code> annotation.
diff --git a/src/docbkx/reference/spring-data.xml b/src/docbkx/reference/spring-data.xml
index 4cd65eb24..d4a0c1fb5 100644
--- a/src/docbkx/reference/spring-data.xml
+++ b/src/docbkx/reference/spring-data.xml
@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
-<chapter id="reference_spring-data">
-    <title>Spring Data</title>
+<chapter id="reference:spring-data">
+    <title>About Spring Data</title>
     <para>
         <ulink url="http://springsource.org/spring-data">Spring Data</ulink> is a SpringSource project that aims to
         provide Spring's convenient programming model and well known conventions for NOSQL databases. Currently there
-        is support for Graph (e.g. Neo4j), Key-Value (e.g. Redis), Document (e.g. MongoDB) and Relational (e.g. Oracle)
+        is support for graph (e.g. Neo4j), key-value (e.g. Redis), document (e.g. MongoDB) and relational (e.g. Oracle)
         databases. Mark Pollack, the author of Spring.NET is the project lead for the Spring Data project.
     </para>
 </chapter>