How can I get data from an xml web service (say, the value of an element) and then store that data so that it can be used throughout the project?

**Update:**

To clarify, I need to get the value from an element in the following web service uri.
"http://web-service-address.com"

Then, I need to be able to use that value in another web service uri.
"http://web-service-address.com/" + stored\_value + "/service"