"Category Theory, Monads, and Duality in the World of (Big) Data" - Keynote talk from Bart J.F. De Smet on 27th July 2011 at ECOOP 2011, Lancaster, UK.

For the past decade, our team has been on a quest to democratize developing data-intensive distributed applications. The secret weapon to slay the complexity dragon has been category theory and monads, but in particular the concept of duality. As it turns out, the data domain is an extremely rich source of all kinds of interesting dualities. These dualities are not just theoretical curiosities, but actually solve many practical problems and help to uncover deep similarities between concepts that at first look totally unrelated. In this talk we will illustrate several of the dualities we have encountered during our journey, and show how this resulted in a novel "A co-Relational Model of Data for Large Shared Data Banks".

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