--- a/wsgraph/model.py	Wed Dec 12 18:54:59 2012 -0800
+++ b/wsgraph/model.py	Wed Dec 12 18:58:08 2012 -0800
@@ -1,8 +1,16 @@
+
+import sys
 from abc import abstractmethod
 from copy import deepcopy
 from utils import isiterable
 
 class Graph(object):
+    """
+    abstract base class for WSGraph model of a graph
+
+    WSGraph is interacted with by implementing
+    wsgraph.model.Graph object for a desired interface
+    """
 
     @abstractmethod
     def node(self, name, **values):
@@ -109,4 +117,4 @@
         raise NotImplementedError
 
 # TODO: CLI entry point to convert from one model to another
-# def main()
+# def main(args=sys.argv[1:]):