[alisnic]

This architecture describes how data affects presentation and vice versa. Your question is a bit off, it involves implementation, not structure.

[swah]

Ok, I also don't quite understand if the Store has any relation to the server-side database.

[colinramsay]

It's just a store. You could write your implementation to store the data anywhere - localstorage, a REST service, the one in the example just keeps it in memory as an array.