Checking out the RC1 version, I was surprised to see there is no longer an XML language at all. I see the older XML/XMLSchema/XMLQuery languages are in the separate "deprecated" zip file.
What happened to the jetbrains.mps.core.xml language? Last I heard, that was the "official" XML language to use instead of the older ones, and now it's just removed with no warning? Is there something to replace it that I'm just missing?