Can an ASPX CascadingDropDown Extender use a Service Path that is not an ASMX? (WFC SVC or Data Service)

I have noticed that all the example in the internet us开发者_StackOverflow中文版es Service Path of ASMX for a cascading dropdown list, is there a way to use more modern technology as it's service path? I was wondering if I could use DataServices for it?

If you want to use more modern technology, ditch the MS cascading dropdownlist and go with something like knockout.js and use your service of choice.