diff --git a/expert/field.py b/expert/field.py
index 3f2a87d..8b0d6f8 100644
--- a/expert/field.py
+++ b/expert/field.py
@@ -202,4 +202,8 @@ class SubReportField(Field):
     def getValue(self, row):
         ri = self.getReportInstance(row)
         return ri.getResults()
+    
+    def getCategoryValue(self, row):
+        ri = self.getReportInstance(row)
+        return ri.getCategoryResults()
     
\ No newline at end of file
diff --git a/expert/report.py b/expert/report.py
index c89a2cd..e12bec2 100644
--- a/expert/report.py
+++ b/expert/report.py
@@ -103,6 +103,11 @@ class ReportInstance(BaseReport):
         qc = CompoundQueryCriteria(parts)
         return ResultSet(self, result, rowFactory=self.rowFactory,
                          sortCriteria=self.getSortCriteria(), queryCriteria=qc)
+        
+    def getCategoryResults(self):
+        result = list(self.selectObjects(None))
+        return ResultSet(self, result, rowFactory=self.categoryRowFactory,
+                         filterDublicate=True)
 
     def selectObjects(self, parts):
         # to be implemented by subclass