<?xml version="1.0"?>
<!-- The first step is to name and define our documents-->
<!DOCTYPE address_book [
<!ELEMENT address_book (record+)>
<!ELEMENT record (name, address, contact, comments)>
<!ELEMENT name (first_name, middle_name, last_name, nick_name?)>
<!ELEMENT first_name (#PCDATA)>
<!ELEMENT middle_name (#PCDATA)>
<!ELEMENT last_name (#PCDATA)>
<!ELEMENT nick_name (#PCDATA)>
<!ELEMENT address (#PCDATA)>
<!ELEMENT contact (#PCDATA)>
<!ELEMENT comments (#PCDATA)>
]>

<address_book>
	<record>
   		<name>
   			<first_name>first name goes here</first_name>
			<middle_name>middle name goes here</middle_name>
			<last_name>last name goes here</last_name>
   		    <!-- Notice, no nickname needed since it is optional -->
   		</name>
   		<address> </address>
   		<contact> </contact>
   		<comments> </comments>
	</record>
</address_book>
