What is the minimum valid JSON?

Question

I\'ve carefully read the JSON description http://json.org/ but I\'m not sure I know the answer to the simple question. What strings are the minimum possible valid JSON?

Answer 1

Just follow the railroad diagrams given on the json.org page. [] and {} are the minimum possible valid JSON objects. So the answer is [] and {}.

Answer 2

Yes, yes, yes, yes, and yes. All of them are valid JSON value literals.

However, the official RFC 4627 states:

A JSON text is a serialized object or array.

So a whole "file" should consist of an object or array as the outermost structure, which of course can be empty. Yet, many JSON parsers accept primitive values as well for input.