JSONPath (RFC 9535)

1. Overview of JSONPath expressions

   Query expression structure with root identifier and segments.

2. Root identifier

   The $ root node identifier that starts every query.

3. Selectors

   Name, wildcard, index, slice and filter selectors.

4. Filter selector

   Comparison, existence and logical expressions.

5. Child and descendant segments

   Recursive descent with ..

6. Function extensions

   length, count, match, search and value.

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