  <!ELEMENT PERSON (NAME, EMPLOYEE_ID, PHONE, OFFICE, PHOTO)>
  <!ELEMENT NAME         (#PCDATA)>
  <!ELEMENT EMPLOYEE_ID  (#PCDATA)>
  <!ELEMENT PHONE        (#PCDATA)>
  <!ELEMENT OFFICE       (#PCDATA)>
  <!ELEMENT PHOTO        EMPTY>
  <!NOTATION JPEG SYSTEM "image/jpeg">  
  <!ATTLIST PHOTO SOURCE ENTITY #REQUIRED>
