yesodweb/persistent — comment on commit 44c6843376da0fa959408c2380b43d3d17770c88
File:  line 0
By gregwebs:

It just tells us the type is embedded. I should be able to get rid of it by just maintaining a Map of existing entities. I will make that change when adding support for embedded lists, which will use list brackets: `[Type]`. What about sets? The Haskell way is `Set Type`. I am tempted to use `{Type}`, which parses nicely like this.