@@ -116,10 +116,11 @@
  */
 - (BOOL)isEqual: (id)obj;
 
 /**
  * Calculate a hash for the object.
+ *
  * Classes containing data (like strings, arrays, lists etc.) should reimplement
  * this!
  *
  * \return A 32 bit hash for the object
  */
@@ -209,5 +210,15 @@
  * Deallocates the object and also frees all memory allocated via its memory
  * pool.
  */
 - (void)dealloc;
 @end
+
+/**
+ * Objects implementing this protocol can be copied.
+ */
+@protocol OFCopying
+/**
+ * \return A copy of the object
+ */
+- (id)copy;
+@end