<part>
	<title>Part I</title>
	<subtitle>Part I subtitle</subtitle>
	<chapter>
		<title>Chapter 1</title>
		<subtitle>Chapter 1 subtitle</subtitle>
		<section>
			<title>Section 1</title>
			<subtitle>Section 1 subtitle</subtitle>
		</section>
	</chapter>
</part>
			
			

			
<part>
	<title>Part I</title>
	<subtitle>Part I subtitle</subtitle>
	<titleabbrev>Part I titleabbrev</titleabbrev>
	<chapter>
		<title>Chapter 1</title>
		<subtitle>Chapter 1 subtitle</subtitle>
		<titleabbrev>Chapter I titleabbrev</titleabbrev>
		<section>
			<title>Section 1</title>
			<subtitle>Section 1 subtitle</subtitle>
			<titleabbrev>Section I titleabbrev</titleabbrev>
		</section>
	</chapter>
</part>