there is a bones node, bone looks at the target always.
I moove the bone on X axle… as i see the bone mooves AND rotates.
All i have is output from the BONE Supports: Matrix Transform

How can i get those X,Y,Z ROTATION values?

Have someone an idea?

Ok, we can get the data via GetMatrix(Transform), we have 16 values, but which value is what?

well, for this you should read up on mathematical matrix transformations. unfortunately i do not know which matrices vvvv uses exactly, maybe someone can enlighten us?

translations and rotations can be represented as a 4x4 matrix as explained e.g. here:
other keywords of interest are: quaternions, affine transformations, homogeneous coordinates. i hope it does not break your brain. ;-)