-# not sure what this used to be nor where it is now defined
-#from sfa.rspecs.sfa_rspec import sfa_rspec_version
-# most likely this should now be
-#from sfa.rspecs.version_manager import VersionManager
+
+from sfa.planetlab.plaggregate import PlAggregate
+from sfa.planetlab.plslices import PlSlices
+from sfa.planetlab.plxrn import slicename_to_hrn