In order to remain current, each Eclipse release targets reasonably current versions of the underlying operating environments. The Eclipse QVTd project depends upon on the Platform,which is mostly "pure" Java™. The 4.4 release of the Eclipse Platform Project is written and compiled against version 1.6 of the Java Platform APIs, and targeted to run on version 1.6 of the Java Runtime Environment, Standard Edition. Eclipse QVTd relies on EMF Core which is written and compiled against version 1.5 of the Java Platform APIs. Eclipse QVTd relies on Java 6.
Eclipse Platform SDK 4.4 will be tested and validated on a number of reference platforms.
Eclipse QVTd will be tested and validated against a subset of those listed for the platform.
Given that there is no operating system dependent code in Eclipse QVTd, it is expected that Eclipse QVTd will work anywhere the Eclipse Platform does.