I have some data in the database. I want those data in database to be stored as an xml file.

I'm using postgresql 9.1 for database, for xml processing I'm using libxml (http://xmlsoft.org/). I'm writing the code in C language. Please help me.

Detailed explanation: I have a client, which sends me a xml file. Server receives the xml file, parses the xml file and stores it in the db. From db i want to send the details in the form of an xml to the client.

client:

 <employee>
       <name>glen</name>
       <telephone>123456789</telephone>
 </employee>

 <employee>
       <name>gwen</name>
       <telephone>123456789</telephone>
 </employee>

server parses this xml file as displayed below:

name : glen telephone:123456789

name : gwen telephone: 123456789

and saves it in a database(postgresql9.1)

if the client requests for details of the employees, i've to send it in xml form from database.I don't know how to do it can u help me out.