diff --git a/Manuals/Tcar-ug/tcar-ug.docbook b/Manuals/Tcar-ug/tcar-ug.docbook
index d59b442..8604ae1 100644
--- a/Manuals/Tcar-ug/tcar-ug.docbook
+++ b/Manuals/Tcar-ug/tcar-ug.docbook
@@ -4,7 +4,7 @@
                [
 
 <!ENTITY % Commons.ent          SYSTEM "Commons.ent">
-<!ENTITY % Introduction.ent     SYSTEM "Introduction.ent">
+<!ENTITY % Preface.ent          SYSTEM "Preface.ent">
 <!ENTITY % Repository.ent       SYSTEM "Repository.ent">
 <!ENTITY % Identity.ent         SYSTEM "Identity.ent">
 <!ENTITY % Locales.ent          SYSTEM "Locales.ent">
@@ -13,7 +13,7 @@
 <!ENTITY % Licenses.ent         SYSTEM "Licenses.ent">
 
 %Commons.ent;
-%Introduction.ent;
+%Preface.ent;
 %Repository.ent;
 %Identity.ent;
 %Locales.ent;
@@ -86,7 +86,7 @@
     </bookinfo>
 
     <!-- Front matter -->
-    &intro;
+    &preface;
 
     <!-- Main matter -->
     &repo;