[Haskell-beginners] data, records and functions

[Emanuel Koczwara]

Hi,

I'm watching Philip Wadler "Faith, Evolution, and Programming
Languages" (very cool by the way):
http://www.youtube.com/watch?v=8frGknO8rIg

At 00:24:14 there is strange thing on the slide:

data Ord a = { less :: a -> a -> Bool }

It's first time I see function type (and where is definition?) in record
syntax. Can somebody explain this?

Emanuel