given that, there are methods you can use to access these protected properties:

ISceneNode.getRotation() => returns RelativeRotation
ISceneNode.setRotation() => sets RelativeRotation
ISceneNode.getScale() => returns RelativeScale
ISceneNode.setScale() => sets RelativeScale
ISceneNode.getPosition() => returns RelativeTranslation
ISceneNode.setPosition() => sets RelativeTranslation
ISceneNode.setAutomaticCulling() => returns AutomaticCullingState
ISceneNode.getAutomaticCulling() => sets AutomaticCullingState

these will give you full access to the metioned properties.  the same style is used throughout Irrlicht so if you see some properties you would like access to and they are protected, seek out some public methods that access them using the Irrlicht manual.  if you cant find any this usually means the designers of the class meant for that attribute to be hidden for some reason.

I noticed that there are a few missing things in your wrapper especially the Protected Attributes in
irr::scene::ISceneNode.

Heres a list of the missing things from ISceneNode:
-E_CULLING_TYPE     AutomaticCullingState
-core::vector3df     RelativeRotation
-core::vector3df     RelativeScale
-core::vector3df     RelativeTranslation

Could you correct this please or tell us how to correct this ?

(Excuse me for my bad English.)

Thanks,
porcus