The name of an item stored in an action source, for example, Sources.Model.StoredFcvPose.bone_kine_local_posx. In the case of pos, rot, and scl, if you leave off the axis indicator at the end of the string then all three axes' values
will be returned as a 3D vector. For rotations, you can then convert the returned Euler angles to the rotation data type (axis
and angle) by using an Euler to Rotation node and specifying the rotation order. However if you key the rotation order on
the original object and include it in the action source, then the rot value is returned as a rotation instead of a vector.
