title: Informatica Repository Query to get Workflow, Session, Mapping and Source/Target of Mapping
body: <p>for cleaning up unused IPC-Sources I need a Repository Query for getting Workflow, Session, Mapping and Source/Target of Mapping.I have startet by joining REP_LOAD_SESSIONS and REP_TBL_MAPPING on mapping_id but only a fraction of mappings seem to be present in the joined output.
  I can't find the right tables to join to get the job done.
  Any help will be greatly appreciated!</p>