<!--applies to xmlap21d.xml-->
<!ELEMENT MEMO (HEADER, MAIN)>
<!---MEMO DTD Version 0.2 - Experimental Use Only-->
<!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 MAIN (#PCDATA | AUTHOR | TYPIST)*>