<?xml version  =  "1.0"?>
<library>
            <book id="1">
                    <author>
                        <author-name>author1</author-name>
                        <author-dob>a date</author-dob>
                    </author>
                    <genre>genre1</genre>
            </book>
            <book id="2">
                    <author>
                        <author-name>author2</author-name>
                        <author-dob>a date2</author-dob>
                    </author>
                    <genre>genre2</genre>
            </book>
            <book id="3">
                    <author>
                        <author-name>author3</author-name>
                        <author-dob>a date3</author-dob>
                    </author>
                    <genre>genre3</genre>
            </book>
</library>