How to semantic model? -> window + contact + roller shutter

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I’m still struggling with the semantic model. I guess I don’t really know how to use the semantic model in rules etc. and so I’m not sure how to set it up.

E. g. how do you define windows with roller shutters and contacts?

My idea is to have an equipment “Window” with a point “OpenState”. I think that’s fine. But what’s about the shutter? Define it as a subequipment of “Window” or just as a point “Control”? How do you do that?

Thanks!