1
<?xml version="1.0" standalone="no"?>
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<!DOCTYPE preface PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
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<preface id="sn-preface"><title>Preface</title>
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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href="formatting_conventions.xml" />
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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href="Some_Subsection.xml" />