<!ELEMENT Schedule (Monday,Tuesday,Wednesday,Thursday,Friday,Saturday,Sunday)>
<!ELEMENT Monday (openSlot*)>
<!ELEMENT Tuesday (openSlot*)>
<!ELEMENT Wednesday (openSlot*)>
<!ELEMENT Thursday (openSlot*)>
<!ELEMENT Friday (openSlot*)>
<!ELEMENT Saturday (openSlot*)>
<!ELEMENT Sunday (openSlot*)>
<!ELEMENT openSlot (#PCDATA)>