I am trying to add write support to plugin datasource, Has anyone attempted doing this? I am trying to figure out the interfaces the PluginWorkspaceHelpder and PluginDatasetHelpder classes should implement to enable editing in ArcMap. I have tried to implement IPlugInWorkspaceHelper2 on the workspacehelpder class and ITable interface on IPlugInDatasetHelper class. Still when I enable editing the workspace appears to be read-only and none of the implemented methods are called.