         # from the Y axis choices because the DC charting does not currently
         # support such a configuration.
         #
-        # @param coll the collection
-        # @returns the valid X and Y axis data types and labels for the current
+        # @param collection the target collection
+        # @returns the valid X and Y axis data types and labels for the target
         #   collection
-        dataTypeChoices: (coll) ->
+        dataTypeChoices: (collection) ->
           xChoices = new Object
           yChoices = new Object
           for dt in DATA_TYPES
             config = CHART_DATA_CONFIG[dt]
-            if 'all' in config.coll or coll in config.coll
+            if 'all' in config.collection or collection in config.collection
               xChoices[dt] = LABELS[dt]
-              if dt not in Object.keys CAT_DATA_SCALES
+              if dt not in Object.keys(CATEGORICAL_VALUES)
                 yChoices[dt] = LABELS[dt]
           choices =
             x: xChoices

                  null
          'cd68':
              label: 'CD68 Normalized Assay'
              coll: [
                'Breast'
              ]
              accessor: (tumor) ->

                  null
          'bag1':
              label: 'BAG1 Normalized Assay'
              collection: [
                'Breast'
              ]
              accessor: (tumor) ->
