diff --git a/pixelocr/gui/glyphdbedit.py b/pixelocr/gui/glyphdbedit.py
index e39a32c..39ed1c0 100644
--- a/pixelocr/gui/glyphdbedit.py
+++ b/pixelocr/gui/glyphdbedit.py
@@ -34,34 +34,34 @@ from ..image import Image
 
 class Column(object):
     header = None
-    def data(self, value):
+    def data(self, glyph_data):
         return None
 
-    def image(self, value):
+    def image(self, glyph_data):
         return None
 
-    def sortKey(self, value):
-        return self.data(value)
+    def sortKey(self, glyph_data):
+        return self.data(glyph_data)
 
 
 class TextColumn(Column):
     header = 'Text'
 
-    def data(self, value):
-        return value.text
+    def data(self, glyph_data):
+        return glyph_data.text
 
-    def image(self, value):
-        return value.image.qimage
+    def image(self, glyph_data):
+        return glyph_data.image.qimage
 
 
 class ElevationColumn(Column):
     header = 'Elevation'
 
-    def data(self, value):
-        return str(value.elevation)
+    def data(self, glyph_data):
+        return str(glyph_data.elevation)
 
-    def sortKey(self, value):
-        return value.elevation
+    def sortKey(self, glyph_data):
+        return glyph_data.elevation
 
 
 class GlyphDBModel(QAbstractTableModel):