<!--applies to xmlap6e.xml-->
<!ELEMENT DOCUMENT (TITLE,AUTHOR+,SUMMARY*,NOTE?)>
<!ATTLIST DOCUMENT
     trackNum CDATA #REQUIRED
     secLevel (unclassified|classified) "unclassified">
<!ELEMENT TITLE (#PCDATA)>
<!ELEMENT AUTHOR (FIRSTNAME,LASTNAME, (UNIVERSITY | COMPANY)?)>
<!ELEMENT FIRSTNAME (#PCDATA)>
<!ELEMENT LASTNAME (#PCDATA)>
<!ELEMENT UNIVERSITY (#PCDATA)>
<!ELEMENT COMPANY (#PCDATA)>
<!ELEMENT SUMMARY (#PCDATA)>
<!ENTITY Description "This is a very simple sample document.">