Hello, Amita, and welcome to chatbots.org!
Right now, Program O does not support the AIML 2.0 specification. It’s in the works (and has been for far too long), but it’s not ready to go yet. I can’t give you a reliable release date yet either, I’m afraid, because in addition to adding AIML 2.0 support, a host of other changes and improvements are being implemented as well. Basically, the next version of Program O will be a ground-up redesign. I’ve finally been able to pull the project “out of the closet” recently, and make some progress with it, but it’s still a very long way off.