diff -r b112bfdde5cc -r 5b6ad7a7fd9d xmlclass/xsdschema.py
--- a/xmlclass/xsdschema.py	Sat Aug 19 21:06:54 2017 +0300
+++ b/xmlclass/xsdschema.py	Mon Aug 21 21:55:18 2017 +0300
@@ -79,9 +79,9 @@
               "fractionDigits", "length", "minLength", "maxLength"]
 
 
-#-------------------------------------------------------------------------------
+# -------------------------------------------------------------------------------
 #                           Structure reducing functions
-#-------------------------------------------------------------------------------
+# -------------------------------------------------------------------------------
 
 
 # Documentation elements
@@ -803,7 +803,7 @@
         elif child["type"] == "sequence":
             child["minOccurs"] = child["maxOccurs"] = 1
             choices.append(child)
-            #raise ValueError("\"sequence\" in \"choice\" is not supported. Create instead a new complex type!")
+            # raise ValueError("\"sequence\" in \"choice\" is not supported. Create instead a new complex type!")
         elif child["type"] == CHOICE:
             choices.extend(child["choices"])
         elif child["type"] == "group":
@@ -1008,9 +1008,10 @@
             return True
     return schema == reference
 
-#-------------------------------------------------------------------------------
+
+# -------------------------------------------------------------------------------
 #                       Base class for XSD schema extraction
-#-------------------------------------------------------------------------------
+# -------------------------------------------------------------------------------
 
 
 class XSDClassFactory(ClassFactory):
@@ -1133,15 +1134,16 @@
     return GenerateParser(XSDClassFactory(minidom.parseString(xsdstring)), xsdstring)
 
 
-#-------------------------------------------------------------------------------
+# -------------------------------------------------------------------------------
 #                           XSD schema syntax elements
-#-------------------------------------------------------------------------------
+# -------------------------------------------------------------------------------
+
 
 XSD_NAMESPACE = {
 
-    #-------------------------------------------------------------------------------
+    # -------------------------------------------------------------------------------
     #                           Syntax elements definition
-    #-------------------------------------------------------------------------------
+    # -------------------------------------------------------------------------------
 
     "all": {
         "struct": """
@@ -1917,9 +1919,9 @@
         "reduce": GenerateFacetReducing("whiteSpace", True)
     },
 
-    #-------------------------------------------------------------------------------
+    # -------------------------------------------------------------------------------
     #                       Syntax attributes definition
-    #-------------------------------------------------------------------------------
+    # -------------------------------------------------------------------------------
 
     "abstract": {
         "type": SYNTAXATTRIBUTE,
@@ -2199,9 +2201,9 @@
         }
     },
 
-    #-------------------------------------------------------------------------------
+    # -------------------------------------------------------------------------------
     #                           Simple types definition
-    #-------------------------------------------------------------------------------
+    # -------------------------------------------------------------------------------
 
     "string": {
         "type": SIMPLETYPE,