Ok, this is what ive come up with:<!DOCTYPE root-element[element-delclarations]><?xml version = "1.0"?><!DOCTYPE Emp [<!ELEMENT Emp( ename, Children, Skills)><!ELEMENT ename (#PCDATA)><!ELEMENT Children(name, Birthday)><!ELEMENT name (#PCDATA)><!ELEMENT Birthday (day, month, year)><!ELEMENT day (#PCDATA)><!ELEMENT month (#PCDATA)><!ELEMENT year (#PCDATA)><!ELEMENT Skills (type, Exams)><!ELEMENT type (#PCDATA)><!ELEMENT Exams (year, city)><!ELEMENT year (#PCData)><!ELEMENT city (#PCDATA)>Is this ok? Have I done anything wrong?Thanks!