diff --git a/a2p_fcdocumentreader.py b/a2p_fcdocumentreader.py
new file mode 100644
index 00000000..85acca32
--- /dev/null
+++ b/a2p_fcdocumentreader.py
@@ -0,0 +1,196 @@
+#***************************************************************************
+#*                                                                         *
+#*   Copyright (c) 2018 kbwbe                                              *
+#*                                                                         *
+#*   This program is free software; you can redistribute it and/or modify  *
+#*   it under the terms of the GNU Lesser General Public License (LGPL)    *
+#*   as published by the Free Software Foundation; either version 2 of     *
+#*   the License, or (at your option) any later version.                   *
+#*   for detail see the LICENCE text file.                                 *
+#*                                                                         *
+#*   This program is distributed in the hope that it will be useful,       *
+#*   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+#*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+#*   GNU Library General Public License for more details.                  *
+#*                                                                         *
+#*   You should have received a copy of the GNU Library General Public     *
+#*   License along with this program; if not, write to the Free Software   *
+#*   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
+#*   USA                                                                   *
+#*                                                                         *
+#***************************************************************************
+
+import FreeCAD, FreeCADGui
+import a2plib
+
+import zipfile
+try:
+    import xml.etree.cElementTree as ET
+except ImportError:
+    import xml.etree.ElementTree as ET
+    
+import os
+
+#------------------------------------------------------------------------------
+class A2p_xmldoc_Property(object):
+    '''
+    BaseClass for xml-Properties
+    '''
+    def __init__(self,treeElement, name,_type):
+        self.treeElement = treeElement
+        self.name = name
+        self.type = _type
+        print(self)
+        
+    def __str__(self):
+        return "PropertyName: {}, Type: {}".format(self.name,self.type)
+
+#------------------------------------------------------------------------------
+class A2p_xmldoc_PropertyString(A2p_xmldoc_Property):
+    
+    def getStringValue(self):
+        s = self.treeElement.find('String')
+        return s.attrib['value']
+    
+#------------------------------------------------------------------------------
+class A2p_xmldoc_PropertySheet(A2p_xmldoc_Property):
+    
+    def getCellValues(self):
+        '''returns a dict:  cellAddress:value '''
+        cellEntries = self.treeElement.findall('Cells/Cell')
+        cellDict = {}
+        for ce in cellEntries:
+            cellDict[ce.attrib['address']] = ce.attrib['content']
+        return cellDict
+
+#------------------------------------------------------------------------------
+class A2p_xmldoc_Object(object):
+    '''
+    class prototype to store FC objects found in document.xml
+    '''
+    def __init__(self,name,_type, tree):
+        self.tree = tree
+        self.dataElement = None
+        self.name = name
+        self.type = _type
+        self.propertyDict = {}
+        self.loadPropertyDict(self.tree)
+        self.label = self.propertyDict['Label'].getStringValue()
+        print(self)
+        
+    def __str__(self):
+        return "ObjName: {}, Label: {}, Type: {}".format(self.name, self.label, self.type)
+    
+    def loadPropertyDict(self,tree):
+        for elem in tree.iterfind('ObjectData/Object'):
+            if elem.attrib['name'] == self.name:
+                self.dataElement = elem
+                for e in elem.findall('Properties/Property'):
+                    if e.attrib['type'] == 'App::PropertyString':
+                        p = A2p_xmldoc_PropertyString(
+                            e,
+                            e.attrib['name'],
+                            e.attrib['type']
+                            )
+                        self.propertyDict[e.attrib['name']] = p
+                    elif e.attrib['type'] == 'Spreadsheet::PropertySheet':
+                        p = A2p_xmldoc_PropertySheet(
+                            e,
+                            e.attrib['name'],
+                            e.attrib['type']
+                            )
+                        self.propertyDict[e.attrib['name']] = p
+                    else:
+                        pass # unsupported property type
+#------------------------------------------------------------------------------
+class A2p_xmldoc_SpreadSheet(A2p_xmldoc_Object):
+    def getCells(self):
+        return self.propertyDict['cells'].getCellValues()
+#------------------------------------------------------------------------------
+class FCdocumentReader(object):
+    '''
+    class for extracting the XML-Documentdata from a fcstd-file given by
+    filepath. Some data can be extracted without opening the whole document
+    within FreeCAD
+    '''
+    def __init__(self):
+        self.tree = None
+        self.root = None
+        self.objects = []
+        
+    def clear(self):
+        self.realPath = ''
+        self.tree = None
+        self.root = None
+        self.objects = []
+        
+    def openDocument(self,fileName):
+        self.clear()
+        #
+        # decompress the file
+        f = zipfile.ZipFile(fileName,'r')
+        xml = f.read('Document.xml')
+        f.close()
+        #
+        # load the ElementTree
+        self.tree = ET.ElementTree(ET.fromstring(xml))
+        #
+        self.loadObjects()
+    
+    def loadObjects(self):
+        self.objects = []
+        for elem in self.tree.iterfind('Objects/Object'):
+            if elem.attrib['type'].startswith('Spreadsheet'): 
+                ob = A2p_xmldoc_SpreadSheet(
+                        elem.attrib['name'],
+                        elem.attrib['type'],
+                        self.tree
+                        )
+                self.objects.append(ob)
+            else:
+                pass # unhandled object types
+            
+    def getObjectByName(self,name):
+        for ob in self.objects:
+            if ob.name == name:
+                return ob
+        return None
+#------------------------------------------------------------------------------
+        
+if __name__ == "__main__":
+    doc = FreeCAD.activeDocument() 
+    dr = FCdocumentReader()
+    dr.openDocument(doc.FileName) 
+    cellDict = dr.getObjectByName('Spreadsheet').getCells()
+    for k in cellDict.keys():
+        print(u"Address: {}, content {}".format(
+                k,
+                cellDict[k]
+                )
+              )
+    
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/a2p_topomapper.py b/a2p_topomapper.py
index 403a1922..b42fa223 100644
--- a/a2p_topomapper.py
+++ b/a2p_topomapper.py
@@ -390,7 +390,10 @@ def getTopLevelObjects(self):
         #-------------------------------------------
         addList = []
         for n in self.topLevelShapes:
-            if n.startswith('Clone'):
+            if (
+                n.startswith('Clone') or
+                n.startswith('Part__Mirroring')
+                ):
                 dummy,outList = self.treeNodes[n]
                 if len(outList) == 1:
                     addList.append(outList[0].Name)