From d4a666029d887716ac2e59f3872c4a25a9fdbb47 Mon Sep 17 00:00:00 2001
From: Tim Hunt <T.J.Hunt@open.ac.uk>
Date: Sat, 18 May 2013 09:16:05 +0100
Subject: [PATCH] MDL-39728 List all the classes in
 question/type/questionbase.php

This should make it easier for people to understand the type hierarchy.
---
 question/type/questionbase.php | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/question/type/questionbase.php b/question/type/questionbase.php
index e7b14ca1f98..452b1a487e5 100644
--- a/question/type/questionbase.php
+++ b/question/type/questionbase.php
@@ -17,6 +17,24 @@
 /**
  * This file defines the class {@link question_definition} and its subclasses.
  *
+ * The type hierarchy is quite complex. Here is a summary:
+ * - question_definition
+ *   - question_information_item
+ *   - question_with_responses implements question_manually_gradable
+ *     - question_graded_automatically implements question_automatically_gradable
+ *       - question_graded_automatically_with_countback implements question_automatically_gradable_with_countback
+ *       - question_graded_by_strategy
+ *
+ * Other classes:
+ * - question_classified_response
+ * - question_answer
+ * - question_hint
+ *   - question_hint_with_parts
+ * - question_first_matching_answer_grading_strategy implements question_grading_strategy
+ *
+ * Other interfaces:
+ * - question_response_answer_comparer
+ *
  * @package    moodlecore
  * @subpackage questiontypes
  * @copyright  2009 The Open University