Example of Nested Elements <purchase order> <identifier>P-101 </identifier> <purchaser>....</purchaser> <itemlist> <item> <identifier>RS1 </identifier> <description>Atom powered rocket sled </description> <quantity>2</quantity> <price>199.95 </price> </item> <item> <identifier>SG2 </identifier> <description>Superb glue </description> <quantity>1 </quantity> <unit-of-measure>liter </unit-of-measure> <price>29.95 </price> </item≥ </itemlist> </purchase order> Database System Concepts-6th Edition 23.9 @Silberschatz,Korth and SudarshanDatabase System Concepts - 6 23.9 ©Silberschatz, Korth and Sudarshan th Edition Example of Nested Elements <purchase_order> <identifier> P-101 </identifier> <purchaser> …. </purchaser> <itemlist> <item> <identifier> RS1 </identifier> <description> Atom powered rocket sled </description> <quantity> 2 </quantity> <price> 199.95 </price> </item> <item> <identifier> SG2 </identifier> <description> Superb glue </description> <quantity> 1 </quantity> <unit-of-measure> liter </unit-of-measure> <price> 29.95 </price> </item> </itemlist> </purchase_order>