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JSONPath defines a string syntax for selecting and extracting JSON (RFC 8259) values from within a given JSON value.
A brief overview of JSONPath syntax.
| Syntax Element | Description |
|---|---|
| $ | root node identifier |
| @ | current node identifier (valid only within filter selectors) |
| [<selectors>] | child segment: selects zero or more children of a node |
| .name | shorthand for ['name'] |
| .* | shorthand for [*] |
| ..[<selectors>] | descendant segment: selects zero or more descendants of a node |
| ..name | shorthand for ..['name'] |
| ..* | shorthand for ..[*] |
| 'name' | name selector: selects a named child of an object |
| * | wildcard selector: selects all children of a node |
| 3 | index selector: selects an indexed child of an array (from 0) |
| 0:100:5 | array slice selector: start:end:step for arrays |
| ?<logical-expr> | filter selector: selects particular children using a logical expression |
| length(@.foo) | function extension: invokes a function in a filter expression |
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