1 files changed, 2 insertions, 0 deletions
diff --git a/src/Node.hpp b/src/Node.hpp
index 353cbc2..40fc6f3 100644
--- a/src/Node.hpp
+++ b/src/Node.hpp
@@ -34,6 +34,8 @@ class Edge;
  */
 class Node : public boost::noncopyable {
 public:
+	typedef std::string ID;
+
 	Node(FrameCount duration=0);
 
 	void add_enter_action(Action* action);