Which OpenNI version to use with latest OpenCV?

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Which OpenNI version (OpenNI 1 or OpenNI 2 or latest OpenNI) shall I use when compiling the latest OpenCV (3.0.0.0-dev) from master with OpenNI support?

See also:

• http://docs.opencv.org/master/modules/refman.html

• http://docs.opencv.org/master/doc/user_guide/ug_highgui.html