Extracting optional values from JSON array of nested JSON objects

Sometimes you want to extract values from a JSON array and transform them into a KNIME table such that one row corresponds to a single value of the array. If the JSON array is nested, i.e., if it contains JSON objects or arrays itself, you sometimes do not want to extract its full values, but only parts thereof. These values can be optional in the sense that they are not present in all values of the array. This workflow explores options for extracting such optional values from a JSON array of nested JSON objects.

External resources

• Jayway JSONPath library