Code is data and data is code. Years ago, I had a brief affair with Lisp and there I picked up this meme. Today, I believe there are also benefits in separating code and data. Glimpses of this debate come up whenever people discuss the syntax for yet another configuration schema. There are 5 levels of power for configuration languages. If you design a new schema, be aware of all of them. Level 1: String in a File The file system is a key-value store. The Linux kernel does it with procfs and sysf...