Dynamic data connection

Hi,

I was wondering if there is a way to setup data connection to call web services dynamically.

There are 3 environments (Dev, Test, and Production) and each environment has designated web services server.

For example, http://devserver is for dev web services, http://testserver is for web services for test environment.

What I'm trying to achieve is that I want to be able to create a pdf in dev environment and then promote it to the test server where the pdf has to call http://testserver instead of http://devserver without having to modify data connection everytime I promote a pdf.

Thanks in advance.