What is true about the parameters used in the Message Shape?

The statement that parameters can be referenced using a placeholder format is accurate. In the context of the Message Shape within Boomi, parameters allow developers to dynamically insert values into a message at runtime, enhancing the message's flexibility and reusability. By using a placeholder format, such as a specific syntax that identifies the parameter, you can easily substitute values into the message, which is particularly useful when dealing with multiple integrations or when the same message structure is used with different data inputs.

This approach promotes modularity and helps streamline the integration process, since you do not need to hard-code values directly into the message. Instead, you can define parameters externally and reference them as needed, which makes it easier to manage changes and maintain the integrity of the integrations without altering the actual message structure.