An answer to http://blog.bjartwolf.com/?p=4522

ConfusedDDD.fs

module Person = 
    open System
    type PersonState = private { id: Guid; name: string; age: int}
    let createPerson id name age = {id = id; name = name; age = age}
    let changeName name personState = {personState with name = name}
    let changeAge age personState = 
        // some crazy business rule involving age
        {personState with age = age}

module SomeOtherModule = 
    open System
    open Person
//    let bjorn = { id=System.Guid.NewGuid(); name="Bjørn Einar"; age=34} // won't compile

    let bjorn = createPerson (Guid.NewGuid()) "Bjørn Einar" 34
    let changedBjorn = bjorn |> changeName "Bjørn the less(?) confused"
    let changedAgedBjorn = changedBjorn |> changeAge 30

If this does what I think it does I will be very happy and indeed less confused.