  <!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>
