Jim Coplien — Symmetry in Design

Domain-Driven Design Europe 2016 - Brussels, January 26-29 2016

DDD is rooted in symmetry — i.e., in a hierarchical model of the world into disjoint sets. We know (in fact, one can formally prove) that the world is not so simple. This means that while DDD may lead to a good top-level architecture, the details must almost always break symmetry locally. This in fact is the foundation of patterns and is also the foundation of most popular programming languages' feature sets. It further explains why popular programming languages are “messy.” This talk gives pointers on how to mix symmetry and symmetry-breaking in design by combining DDD, object-orientation, patterns, and DCI, and give an intuitive glimpse of the unifying formalisms that tie them together.

[jacekjacenty]

Jim Coplien is definitely the speaker whose ideas are worth my attention. I like his way of challenging our assumptions about patterns, symmetry and programming in general.

[KevinBeal]

I really like Jim and his unabashed destruction of conferences and their other speakers.

[DJjetseb]

so we can implement roles using typeclass in haskell ?

[jeddak]

At a high level, DCI sounds like Systems Thinking applied to OO.

[tyrotoxin]

Good thinking and ideas worth attention, but down-voted. we use DDD to around expertise of people to scale the organization in first place, otherwise it would be a chaos to try build complex product and focus only on use cases. Eventually you'll have to go with hierarchical sub-domains just because every human being has limitations to the mental capacity and productivity. Then, too much critics, where are proposals?