(string) @string

(field_name) @attribute

(comment) @comment

(number) @number
; For stuff like "inf" and "-inf".
(scalar_value (identifier)) @number
(scalar_value (signed_identifier)) @number

(open_squiggly) @punctuation.bracket
(close_squiggly) @punctuation.bracket
(open_square) @punctuation.bracket
(close_square) @punctuation.bracket
(open_arrow) @punctuation.bracket
(close_arrow) @punctuation.bracket