About Unity Oculus Integration SDK folder architecture

Is there any documents on explain the folder architecture of Oculus Interaction SDK?

Like an explanation of each folder is in charge of what function, I know folders like AudioManager, Spataializer, Voice are most for audio processing(SoundFX, Surround, ), LipSync is for lip movement animation generation from speech, what are the contents under Interaction and VR folders?

Or it's better to have detailed introduction for each C# script file under these folders. 

Thanks in advance.