1 <!ELEMENT employeeId (#PCDATA)>
2 <!ELEMENT name (#PCDATA)>
3 <!ELEMENT position (#PCDATA)>
4 <!ELEMENT salary (#PCDATA)>
5 <!ELEMENT address (#PCDATA)>
6 <!ELEMENT entElement ( #PCDATA ) >
7 <!ELEMENT gender ( #PCDATA | entElement )* >
8 <!ELEMENT employee (employeeId, name, position, salary, gender, address) >
9 <!ELEMENT staff (employee)+>
13 domestic CDATA #IMPLIED
16 domestic CDATA "MALE" >