Thanks for the information, George. I've now switched to using /Applications/oxygen/lib/jing.jar, and have downloaded and installed a separate copy of Saxon 9 (home edition). Thanks again.
I integrated all the development from oNVDL, including the NVDL implementation in the jing-trang project http://code.google.com/p/jing-trang/ So, I forked Jing as oNVDL, I added fixes and NVDL support in oNVDL and I merged those changed back to Jing. You can use jing.jar instead onvdl.jar.
oXygen version 11 comes with Saxon Enterprise Edition (former Saxon SA) version 9.2, saxon9ee.jar. That does not seem to have a command line switch to enable using it as Home Edition (which is the successor of Saxon B). The saxon9ee.jar contains the Saxon HE code and thus oXygen does not need a separate jar to support Saxon HE. I am afraid there is not much we can do about that, you may ask Mike Kay to add a command line switch to enable using Saxon HE from saxon9ee.jar.
Specifically with version 11.0 you can use the old Saxon 9.1 that is placed in lib/xproc/calabash as we ship that as well being needed by Calabash but this will change in 11.1 as Norm Walsh updates Calabash to use Saxon 9.2.