how to add a xml form of string into xml file

[DiY@R]

I want to create a xml dynamically and i want to add a new tag(static data) into it.sample: \[code\]<MyXml> <Employee> </Employee> </MyXml>\[/code\]and i want to add \[code\]<address>newyork</address>\[/code\] and the finalxml should be:\[code\]<MyXml> <Employee> <address>newyork</address> </Employee> </MyXml>\[/code\]Could you please suggest how to do it?Thanks