[JimDabell]

> I don't understand why we should use JSON to configure a server, when a much more powerful language exists: Javascript.

Because it's more powerful. More powerful, in many cases, is a worse thing. Executable imperative code isn't as flexible as a data file because all you can really do with it is execute it and take the output, rather than process it as you see fit.

See:

Rule of Least Power – https://en.wikipedia.org/wiki/Rule_of_least_power

Principle of Least Power – http://c2.com/cgi/wiki?PrincipleOfLeastPower

[amelius]

These articles are phrased as if they are facts. However, they are just some opinions that some people feel are useful.

Take for instance the idea of the "semantic web", where information is stored neatly into proper html tags. It has turned out that this is not a very useful approach to storing information, and nowadays big search engines use machine learning techniques instead to extract the information.