Searching for a simple online shop app example/tutorial (shopping cart)

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I'm working on a simple online shop app. I see a nice example image of the domain model, it seems it was a part of some old Mendix blog post, is there any links to this post or any similar example projects/tutorials? Screenshot: https://ibb.co/94N99x0  
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I think it was this post.

https://www.mendix.com/blog/3-steps-to-building-your-data-model-in-mendix/
 

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