#Intro I looked at this thinking it would be useful with WebSharper.Forms definition. I was wrong, but I want to keep a trace of this, so here is a blog post about it. This post is not meant to be pedagogical, but it can be useful as an example. We’ll work on an example DU type hypothetically used to describe form fields: type DataType = |String of name:string |Int of name:string |Choice of name:string * string list You can use this type to define forms.