diff --git a/system/project.py b/system/project.py
index f3ff054..5356b55 100644
--- a/system/project.py
+++ b/system/project.py
@@ -57,21 +57,22 @@ class Project:
         self.data_tree.foreach(is_obj, retval)
         return retval[-1]
 
-    def add_data(self, parent, data):
+    def add_data(self, parent, data, fun='Function'):
         """Adds a set of data and plots to the navigator.
 
         This method is usually called after a Function in a workflow
         has finished and returns its output."""
         
         parent_iter = self.get_data_iter(parent)
+        it = self.data_tree_insert(parent_iter, fun, None)
 
         for d in data:
             if isinstance(d, dataset.Dataset):
                 self.add_dataset(d)
-                self.data_tree_insert(parent_iter, d.get_name(), d)
+                self.data_tree_insert(it, d.get_name(), d)
             elif isinstance(d, plots.Plot):
 #                self.add_view(d)
-                self.data_tree_insert(parent_iter, d.get_title(), d)
+                self.data_tree_insert(it, d.get_title(), d)
                 d.set_project(self)
                 self.attach(d, 'selection_update')
 
@@ -81,6 +82,7 @@ class Project:
         tree.set_value(it, 0, text)
         tree.set_value(it, 1, type(data))
         tree.set_value(it, 2, data)
+        return it
 
     def add_dataset(self,dataset):
         """Appends a new Dataset to the project."""
@@ -101,3 +103,4 @@ class Project:
 
     def set_current_data(self, obj):
         self.current_data = obj
+
diff --git a/system/workflow.py b/system/workflow.py
index 582cac9..62dc41d 100644
--- a/system/workflow.py
+++ b/system/workflow.py
@@ -120,7 +120,7 @@ class WorkflowView (gtk.VBox):
 
         new_data = function.run(project.current_data)
         if new_data != None:
-            project.add_data(parent_data, new_data)
+            project.add_data(parent_data, new_data, function.name)
 
         logger.log('debug', 'Function ended: %s' % function.name)
         
diff --git a/workflows/go_workflow.py b/workflows/go_workflow.py
index 82df27e..97d7908 100644
--- a/workflows/go_workflow.py
+++ b/workflows/go_workflow.py
@@ -117,7 +117,9 @@ class DatasetLog(workflow.Function):
         logger.log('notice', 'Taking the log of dataset %s' % data.get_name())
         d = data.asarray()
         d = log(d)
-        return [dataset.Dataset(d)]
+        new_data_name = 'log(%s)' % data.get_name()
+        ds = dataset.Dataset(d, name=new_data_name)
+        return [ds]
 
 class DatasetLoadFunction(workflow.Function):
     """Loader for previously pickled Datasets."""