diff -r da5f1fa46f2b -r fb73a6b6622d plcopen/plcopen.py
--- a/plcopen/plcopen.py	Thu Oct 19 10:57:35 2017 +0300
+++ b/plcopen/plcopen.py	Thu Oct 19 11:03:03 2017 +0300
@@ -209,8 +209,8 @@
 PLCOpen_v1_xml = PLCOpen_v1_file.read()
 PLCOpen_v1_file.close()
 PLCOpen_v1_xml = PLCOpen_v1_xml.replace(
-        "http://www.plcopen.org/xml/tc6.xsd",
-        "http://www.plcopen.org/xml/tc6_0201")
+    "http://www.plcopen.org/xml/tc6.xsd",
+    "http://www.plcopen.org/xml/tc6_0201")
 PLCOpen_v1_xsd = etree.XMLSchema(etree.fromstring(PLCOpen_v1_xml))
 
 # XPath for file compatibility process