I am working on system which (I hope) will be 5GL. I use literate programming as it main programming language. I cannot use any 1/2/3/4GL language in the system because of lot of limitations in 3/4GL languages. My system operates on meta-meta-data about code. I can define meta-meta-data about code using literate programming only.

If you will look at some existing systems, which operate with meta-meta-data, like yum/rpm, or apt/deb, or maven2, etc., then you will see, that code, which describes packages, is literate-like: it contains author, title, description, general overview of package, etc. It does not contains function, or something like that.

If my English is wrong - sorry. I am Ukrainian.