UNIMPL_CMD ("CSTABULATE", "Tabulate complex samples")
UNIMPL_CMD ("CTABLES", "Display complex samples")
UNIMPL_CMD ("CURVEFIT", "Fit curve to line plot")
-UNIMPL_CMD ("DATASET", "Alternate data set")
+UNIMPL_CMD ("DATASET ACTIVATE", "Switch to alternate data set")
+UNIMPL_CMD ("DATASET CLOSE", "Delete alternate data set")
+UNIMPL_CMD ("DATASET COPY", "Duplicate alternate data set")
+UNIMPL_CMD ("DATASET DECLARE", "Start alternate data set")
+UNIMPL_CMD ("DATASET DISPLAY", "List alternate data sets")
+UNIMPL_CMD ("DATASET NAME", "Give the current data set a name")
UNIMPL_CMD ("DATE", "Create time series data")
UNIMPL_CMD ("DEFINE", "Syntax macros")
UNIMPL_CMD ("DETECTANOMALY", "Find unusual cases")