Anyone who's written a Domain-specific language (DSL) or found themselves accidentally entrenched in a shotgun parser knows the pains involved in processing a grammar. We found ourselves needing to take a predefined Abstract Syntax Tree (AST) and generate a UI from it. The pain we experienced along the way forced us into a disciplined simplicity from which some pretty useful design patterns emerged. In this blog post, we share the lessons we learned from situations where complexity led us into a