6.3. JQ expressions

Each workflow instance is associated with a data model. A data model consists of a JSON object regardless of whether the workflow file contains YAML or JSON. The initial content of the JSON object depends on how the workflow is started. If the workflow is created using the CloudEvent, then the workflow content is taken from the data property. If the workflow is started through an HTTP POST request, then the workflow content is taken from the request body.

The JQ expressions are used to interact with the data model. The supported expression languages include JsonPath and JQ. The JQ expression language is the default language. You can change the expression language to JsonPath using the expressionLang property.

{
      "name": "max",
      "type": "expression",
      "operation": "{max: .numbers | max_by(.x), min: .numbers | min_by(.y)}"
    }