I’m a big fan of Eric Evans book Domain Driven Design and so is Martin Fowler. As I was reading his FluentInterface article I also stumbled upon his explanations of Evans classifications within the domain model. It’s a good explanation of some of the basics for Evans DDD.
The fluent interface article is intriguing too. As Fowler points out it has it’s advantages and disadvantages. I’m not quite convinced it’s easier to read though, even though it’s closer to the domain language. It sort of resembles the query language for TopLink expressions. It’s not always the easiest thing to read, but maybe it is just a matter of mindset.