Hello Ming,
i have heard from that project in the past, but without details. Interesting that such a old project is still used (security and compatibility perspective).
At least my opinion on your question:
IHE XDS.b is quite stable from (Soap) API perspective over the last years. Nevertheless, even small changes can break things.
Depending on what you need to do, there is a (small) chance that is works even with IPF as a client framework, but no one can guarantee this. I assume you build a XDS client (source or consumer): The easiest way might be a small integration test to see what happens.
Best regards,
Thomas