I would like the ability to at least view realtionship classes within an ArcGIS online map service. For example, we have water valves and the water valve inspections with their relationship class to the inspection data. I would like to expose the inspection data as a relationship class to the valve feature class which can be viewed by the end user during a water shutdown using either arcgis online in windows or through one of the many apps ESRI has put out. 'Green App, Explorer, Collector'. The only way I can see to do this currently is through either copying data over to the valve feature class or through a join. The issue with the join is it doesn't support one to many relationships, and the copying of data over is a process that we don't have the time or personel to support. It also doesn't give the end user the ability to see the historical maintenance of that particular valve.