Somewhat off topic: I thought perhaps you meant cool URIs but it turns out that's a different term. Cool URIs are about permanence. Reworking your internal fil

Somewhat off topic: I thought perhaps you meant cool URIs but it turns out that's a different term. Cool URIs are about permanence. Reworking your internal file-structure should not break existing URIs. [0] Clean URLs are about avoiding leaking implementation details into the URL, e.g. .php, and also avoiding excessive use of query strings. [1] [0] https://www.w3.org/Provider/Style/URI https://www.w3.org/Provider/Style/URI [1] https://en.wikipedia.org/wiki/Clean_URL#Structure https://en.wikipedia.org/wiki/Clean_URL#Structure