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1."ItemsPath": "$.requestPayload.files"
: This selects the "files" key from the JSON map located at the path "$.requestPayload.files."
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"ItemSelector": { ... }
: The ItemSelector is a set of expressions to access specific keys or values from the selected map element. -
"requestPayload.context.$": "$.requestPayload.context"
: This accesses the value of the "context" key from the JSON map located at the path "$.requestPayload.context." -
"dataset.$": "$.[0][$$.Map.Item.Value]"
: This selects the first element from the array, which is the current element being processed in the map (specified by "$.[0]"), and then accesses the value based on the key specified by "$$$.Map.Item.Value" (the key in the map being processed). -
"file.$": "$$$.Map.Item.Value"
: This directly accesses the value of the current key being processed in the map ("$$$.Map.Item.Value").
With these expressions, you can read and access the keys "Dataset1" and "Dataset2" from the JSON map within the StepFunction parameter.
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