In your tutorial for nested repeat region (Advanced: Using the Group By Filter in HTML5 Data Bindings Formatter) you are placing the category in one column and the products as nested repeat in another column. The data from the category is given by {{$name}}. How do I display another value from the category table? For example:

Category CategoryIcon Products
...

Any ideas?

you could just get it from the first object in the group like {{$value[0].CategoryIcon}}

That worked thanks.