In ARIS objects of the Text annotation type must not be embedded in a pool or a subprocess. Because they must be embedded in a container element, during export to a BPMN file they are embedded in the same element of the flowContainerElement type that the associated element of the flowElement type is embedded in.
The ID of the textAnnotation element consists of the FLOWNODE_ string and the external GUID of the object of the Text annotation type. The ID of the associated flow element consists of the FLOW_ string and the GUID of the connection. The souceRef attribute references the textAnnotation element and the targetRef attribute references the flowElement element.