What he's trying to say is that if you're new to computer development and techniques skinning is very advanced. And you don't really learn by having an example you don't understand, so start asking questions.
But I agree with you, this tutorial is pretty bad written, I'm sorry. It requires basic knowledge about skinning. Take my advice, read the documentation and start off with a more simple example. There's a dummies-proof chapter in the documentation on My First Skin.
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