This document describes the JSONPath syntax used in the application for querying JSON data.

JSONPath expressions always start with $, which represents the root object.

• $ - Root object
• .property - Child property access
• ['property'] - Child property access (bracket notation)
• [index] - Array index access
• [*] - All elements in an array
• ..property - Recursive descent (all properties with this name)

• [start:end:step] - Array slice
• [?(@.property)] - Filter expression (elements with the specified property)
• [?(@.property == value)] - Filter with comparison
• [?(@.property > value)] - Filter with comparison
• [?(@.property in [val1, val2])] - Filter with value matching

$.store.book[0].title         # First book's title
$.store.book[*].title         # All book titles
$.store.book[*].price         # All book prices

$[0]                          # First element
$[*]                          # All elements
$[0,1,2]                      # First three elements
$[0:2]                        # Range of elements (first two)

$.store.book[?(@.price < 10)]                  # Books cheaper than $10
$.store.book[?(@.category == 'fiction')]       # Fiction books
$.store.book[?(@.authors[*] == 'J. R. R. Tolkien')]  # Books by Tolkien

$..book                       # All books anywhere in the document
$..title                      # All titles anywhere in the document
$root:$.property              # Reference to root from a nested context

In this application, JSONPath is used for:

• Data source selectors
• Data extraction from JSON responses
• Dynamic field mapping
• Data splitting and filtering

Example selectors from the project:

$.val1                        # Simple property access
$.nested_1.nested_1_1         # Nested property access
$['split1']                   # Bracket notation
$[*].table                    # All tables in an array
$.additionalData2[?(@.name == 'N1')].values[*].val  # Filtered nested access

Reference: - JSONPath - XPath for JSON (https://goessner.net/articles/JsonPath/) - JSONPath Online Evaluator (https://jsonpath.com/)