diff --git a/README.md b/README.md
index 029b622..7571908 100644
--- a/README.md
+++ b/README.md
@@ -4,13 +4,7 @@
 
 ##Install XMind SDK for python
 
-Clone the repository to a local working directory
-
-	git clone https://github.com/xmindltd/xmind-sdk-python.git
-	
-Now there will be a directory named `xmind-sdk-python` under the current directory. Change to the directory `xmind-sdk-python` and install **XMind SDK for python**.
-
-	python setup.py install
+	pip install git+https://github.com/xmindltd/xmind-sdk-python.git
 	
 *It is highly recommended to install __XMind SDK for python__ under an isolated python environment using [virtualenv](https://pypi.python.org/pypi/virtualenv)*
 
diff --git a/examples/dump.py b/examples/dump.py
new file mode 100644
index 0000000..0186317
--- /dev/null
+++ b/examples/dump.py
@@ -0,0 +1,42 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Author:  hzsunshx
+# Created: 2014-11-14 11:27
+
+"""
+dump xmind files
+"""
+
+import xmind
+import pipes
+
+M = {}
+
+def _echo(tag, element, indent=0):
+    title = element.getTitle()
+    M[element.getID()] = title
+    print '\t'*indent, tag, ':', pipes.quote(title)
+
+def dump_sheet(sheet):
+    rootTopic = sheet.getRootTopic()
+    _echo('RootTopic', rootTopic, 1)
+
+    for topic in rootTopic.getSubTopics() or []:
+        _echo('AttachedSubTopic', topic, 2)
+
+    for topic in rootTopic.getSubTopics(xmind.core.const.TOPIC_DETACHED) or []:
+        _echo('DetachedSubTopic', topic, 2)
+
+    for rel in sheet.getRelationships():
+        id1, id2 = rel.getEnd1ID(), rel.getEnd2ID()
+        print 'Relation: [%s] --> [%s]' % (M.get(id1), M.get(id2))
+
+def main():
+    x = xmind.load('test2.xmind')
+    for sheet in x.getSheets():
+        _echo('Sheet', sheet)
+        dump_sheet(sheet)
+
+if __name__ == '__main__':
+    main()
diff --git a/example.py b/examples/example.py
similarity index 100%
rename from example.py
rename to examples/example.py
diff --git a/examples/test2.xmind b/examples/test2.xmind
new file mode 100644
index 0000000..c6d2f2a
Binary files /dev/null and b/examples/test2.xmind differ
diff --git a/xmind/core/const.py b/xmind/core/const.py
index a9b27d1..e637c01 100644
--- a/xmind/core/const.py
+++ b/xmind/core/const.py
@@ -67,6 +67,7 @@
 
 TOPIC_ROOT = "root"
 TOPIC_ATTACHED = "attached"
+TOPIC_DETACHED = "detached"
 
 FILE_PROTOCOL = "file://"
 TOPIC_PROTOCOL = "xmind:#"
diff --git a/xmind/core/sheet.py b/xmind/core/sheet.py
index b042e40..1acc2bf 100644
--- a/xmind/core/sheet.py
+++ b/xmind/core/sheet.py
@@ -64,6 +64,13 @@ def createRelationship(self, end1, end2, title=None):
 
         return rel
 
+    def getRelationships(self):
+        """
+        Get relationships from current sheet
+        """
+        elems = RelationshipsElement(self._getRelationships())
+        return map(RelationshipElement, elems.iterChildNodesByTagName(const.TAG_RELATIONSHIP))
+
     def _getRelationships(self):
         return self.getFirstChildNodeByTagName(const.TAG_RELATIONSHIPS)