If you launch data lineage on a mapplet port for a mapplet that does not have any instances in PowerCenter mappings, Metadata Manager displays the mapplet and the mapplet ports in the data lineage diagram. Metadata Manager does not display links from the mapplet ports to other PowerCenter objects. If you launch lineage on a mapplet port, and the mapplet has instances in PowerCenter mappings, Metadata Manager displays the links from the mapplet input and output ports to the other PowerCenter objects.