Extract values from a JSON document with a JSONPath expression or an RFC 6901 JSON Pointer, without returning the whole document. Send {data, path}; get {matches, count}. Path starting with $ = JSONPath ($.items[*].price, $..author, [0], [1:5], [*]); starting with / = JSON Pointer (/items/0/price). No-eval tree walk with bounded traversal; filter expressions [?(…)] are not supported by design.

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