For reader and writer plugins we have to define them on the client in order to be used but shouldn't have to.
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
The extensions that are associated with readers should be only from the server side XML definition but currently the client specifies that information. For readers that rely on MPI with a client built without MPI or plugins that are only on the server, the readers are essentially unavailable in the GUI. The readers and writers need to be used based on the server side definitions only and made available through whatever client is connected to them.