1 files changed, 13 insertions, 0 deletions
diff --git a/stdnum/damm.py b/stdnum/damm.py
index b37c08c..9f36e40 100644
--- a/stdnum/damm.py
+++ b/stdnum/damm.py
@@ -38,6 +38,19 @@ InvalidChecksum: ...
 '4'
 >>> validate('5724')
 '5724'
+>>> table = (
+...     (0, 2, 3, 4, 5, 6, 7, 8, 9, 1),
+...     (2, 0, 4, 1, 7, 9, 5, 3, 8, 6),
+...     (3, 7, 0, 5, 2, 8, 1, 6, 4, 9),
+...     (4, 1, 8, 0, 6, 3, 9, 2, 7, 5),
+...     (5, 6, 2, 9, 0, 7, 4, 1, 3, 8),
+...     (6, 9, 7, 3, 1, 0, 8, 5, 2, 4),
+...     (7, 5, 1, 8, 4, 2, 0, 9, 6, 3),
+...     (8, 4, 6, 2, 9, 5, 3, 0, 1, 7),
+...     (9, 8, 5, 7, 3, 1, 6, 4, 0, 2),
+...     (1, 3, 9, 6, 8, 4, 2, 7, 5, 0))
+>>> checksum('816', table=table)
+9
 """
 
 from stdnum.exceptions import *