Allowing a syntax like [#items groupBy type] [name]: [quantity] [/items] To display lists grouped by the considered tags, for example [{ "items": [{ "type": "Vehicles", "name": "Cars", "quantity": "10" }, { "type": "Vehicles", "name": "Trains", "quantity": "20" }, { "type": "Vegetables", "name": "Tomatoes", "quantity": "10" }, { "type": "Vegetables", "name": "Potatoes", "quantity": "50" }] }] could then produce Vehicles: Cars: 10 Trains: 20 Vegetables : Tomatoes: 10 Potatoes: 50