<!--applies to xmlap20f.xml-->
<!ENTITY % ORDER SYSTEM "order.dtd">
%ORDER;
<!ELEMENT ITEM (BOOK, QUANTITY, PRIORITY?, DISCOUNT, EXTENDEDCOST)>
<!ELEMENT DISCOUNT (#PCDATA)>
<!ELEMENT EXTENDEDCOST (#PCDATA)>
<!ELEMENT BOOK (ISBN, TITLE, PRICE)>
<!ELEMENT ISBN (#PCDATA)>
<!ELEMENT TITLE (#PCDATA)>
<!ELEMENT PRICE (#PCDATA)>
<!ELEMENT QUANTITY (NUMBER, CARTON?)>
<!ATTLIST QUANTITY
      SHIPCQ     (NO | ROUNDUP | ROUNDDOWN | ROUNDCLOSEST) "NO">
<!ELEMENT NUMBER (#PCDATA)>
<!ELEMENT CARTON (#PCDATA)>
