Your English is fine.
The RealSense development team are apparently looking at OpenNI support in RealSense SDK 2.0, as it says this on the SDK's documentation main page. There is no date yet for when that might be available though.
You may also be interested in reading a discussion from this year about SDK 2.0 and OpenNI.
If you need skeletal tracking now with D415, there is a software solution called Nuitrack.