Altova is well known for it's flagship product XMLSpy - as anyone who has worked extensively with XML data can tell you. However, they have an entire suite of product offerings, one of which is MapForce. As described on it's website:
A typical Healthcare Information Exchange (HIE) accepts data from an array of disparate sources. Often the data it accepts is semantically and syntactically altered by a providing system to satisfy interfacing requirements. However, there are also cases where data from different sources need to be properly merged before reaching the HIE's interface.
It is always good to come across a situation where you have an easy solution to a customer problem. It's even better when the customer thinks the problem is a hard one!