--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plcopen/POUVariablesCollector.py	Sat Feb 17 23:58:47 2018 +0100
@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# This file is part of Beremiz.
+# See COPYING file for copyrights details.
+
+from __future__ import absolute_import
+from plcopen.XSLTModelQuery import XSLTModelQuery
+
+def class_extraction(value):
+    class_type = {
+        "configuration": ITEM_CONFIGURATION,
+        "resource": ITEM_RESOURCE,
+        "action": ITEM_ACTION,
+        "transition": ITEM_TRANSITION,
+        "program": ITEM_PROGRAM}.get(value)
+    if class_type is not None:
+        return class_type
+
+    pou_type = POU_TYPES.get(value)
+    if pou_type is not None:
+        return pou_type
+
+    var_type = VAR_CLASS_INFOS.get(value)
+    if var_type is not None:
+        return var_type[1]
+
+    return None
+
+
+class _VariablesTreeItemInfos(object):
+    __slots__ = ["name", "var_class", "type", "edit", "debug", "variables"]
+
+    def __init__(self, *args):
+        for attr, value in zip(self.__slots__, args):
+            setattr(self, attr, value if value is not None else "")
+
+    def copy(self):
+        return _VariablesTreeItemInfos(*[getattr(self, attr) for attr in self.__slots__])
+
+
+class VariablesTreeInfosFactory(object):
+
+    def __init__(self):
+        self.Root = None
+
+    def GetRoot(self):
+        return self.Root
+
+    def SetRoot(self, context, *args):
+        self.Root = _VariablesTreeItemInfos(
+            *([''] + _translate_args(
+                [class_extraction, _StringValue] + [_BoolValue] * 2,
+                args) + [[]]))
+
+    def AddVariable(self, context, *args):
+        if self.Root is not None:
+            self.Root.variables.append(_VariablesTreeItemInfos(
+                *(_translate_args(
+                    [_StringValue, class_extraction, _StringValue] +
+                    [_BoolValue] * 2, args) + [[]])))
+
+
+
+class POUVariablesCollector(XSLTModelQuery):
+    """ object for collecting instances path list"""
+    def __init__(self, controller):
+        XSLTModelQuery.__init__(self,
+                                controller,
+                                "pou_variables.xslt",
+                                [(name, lambda *x : getattr(self.factory, name)(*x)) 
+                                    for name in ["SetRoot", "AddVariable"]])
+
+    def Collect(self, root, debug):
+        self.factory = VariablesTreeInfosFactory()
+        self._process_xslt(root, debug)
+        res = self.factory.GetRoot()
+        self.factory = None
+        return res
+