<!--applies to xmlap21f.xml-->
<!--MEMO DTD Version 0.3 - Experimental Use Only-->
<!ELEMENT MEMO (HEAD?,HEADER, MAIN)>
<!--HEADER information for addressing -->
<!ELEMENT HEADER (DISTRIBUTION, SUBJECT, DATE)>
<!ELEMENT DISTRIBUTION (TO, CC?, FROM)>
<!ELEMENT TO (#PCDATA | IDENTITY)*>
<!ELEMENT CC (#PCDATA | IDENTITY)*>
<!ELEMENT FROM (#PCDATA| IDENTITY)*>
<!ELEMENT IDENTITY (#PCDATA)>
<!--May add NAMEID attribute for easier connection to directory structures later -->
<!ELEMENT SUBJECT (#PCDATA | DESCRIP)*>
<!ELEMENT DESCRIP (#PCDATA)>
<!ELEMENT DATE (#PCDATA)>
<!ELEMENT AUTHOR (IDENTITY+)>
<!ELEMENT TYPIST (IDENTITY+)>
<!ELEMENT PARAGRAPH (#PCDATA|HIGHLIGHT|IDENTITY)*>
<!ELEMENT HIGHLIGHT (#PCDATA)>
<!ELEMENT HEADLINE (#PCDATA)>
<!ELEMENT MAIN ((PARAGRAPH | HIGHLIGHT | HEADLINE)*, AUTHOR?, TYPIST?)>