added constants module

diff --git a/constants.py b/constants.py
new file mode 100644 (file)
index 0000000..57af873
--- /dev/null
+++ b/constants.py
@@ -0,0 +1,8 @@
+# item types
+TYPE_DIRECTORY = 'd'
+TYPE_FILE = 'f'
+
+# fields
+FIELD_TOPLEVEL = 'o'
+FIELD_MIDDLELEVEL = 'ou'
+FIELD_LOWLEVEL = 'cn'