In the Package element, the last item added is a container item called Pages. For each process contained in the XPDL file, a subordinate Page element is generated in this Pages element. The Page element has an Id attribute, whose value is the GUID of the process model (BPMN collaboration diagram (BPMN 2.0) followed by PAGE.
For each object, a NodeGraphicsInfo or ConnectorGraphicsInfo element exists, describing the exact position in the model.
If embedded processes are part of the XPDL file, the position of an object or connection is not clear. Therefore, the PageId attribute is added to both the NodeGraphicsInfo and the ConnectorGraphicsInfo element with its value referencing the matching Page element.