Self reference in XML schema?

Hi there,

 

I am new to XML schema. I wonder if I can use self reference in XML
schema. In my XML data, the EMPLOYEE element contains MANAGER element.
MANAGER is also an EMPLOYEE. How can I use XML schema to define this
relationship without repeating the same code for EMPLOYEE and MANAGER
elements?

Is there any sample code? The XML have the following structure:

 

<EMPLOYEE>

            <ID />

            <name />

             <MANAGER>

                        <ID />

                        <name />

            </MANAGER>

</EMPLOYEE>

 

Thanks in advance.

 

Yolande