I read in RMH book or MZ Notes (or both, don't remember exactly) that TrAX is a part of JAXP. But in the mock exams (both xyzws and whiz labs), it is specifies as not a part of JAXP. However they say that XSLT is a part of JAXP. Is there an API called XSLT ? I was thinking XSLT and TrAX are all some. Can some one differentiate between these two?