•<!ELEMENT address (name,
email, phone, birthday)>
•<!ELEMENT name (first,
last)>
•<!ELEMENT first
(#PCDATA)>
•<!ELEMENT last (#PCDATA)>
•<!ELEMENT email
(#PCDATA)>
•<!ELEMENT phone
(#PCDATA)>
•<!ELEMENT birthday (year, month,
day)>
•<!ELEMENT year
(#PCDATA)>
•<!ELEMENT month
(#PCDATA)>
•<!ELEMENT day (#PCDATA)>