Clarify data types for values of maps and lists #276
Description
This concern is also seen in a very similar issue/PR. MUST also be one of these data types says to me that the values within any complex data structure such as a map or list MUST also be a complex data structure such as a map or list or similar, rather than permitting the simple data structures previously listed. I suggest just repeating the list, for clarity, even though it lengthens the paragraph.
Originally posted by @TallTed in #272 (comment)