pacemaker/doc/Clusters_from_Scratch/en-US/Preface.xml

<?xml version='1.0' encoding='utf-8' ?>
<!DOCTYPE preface PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
<!ENTITY % BOOK_ENTITIES SYSTEM "Clusters_from_Scratch.ent">
%BOOK_ENTITIES;
]>
<preface><title>Preface</title>
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</preface>