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Fix for the issue #3116 : Create Edge, Wire all-in is missed for feature in Partset
[modules/shaper.git] / src / Model / Model_AttributeSelection.cpp
index 17120173be44d4a53d24551876438d059fe27540..9d1e6cb65311873de13c46cde27684fe2a2bdcc5 100644 (file)
@@ -1,4 +1,4 @@
-// Copyright (C) 2014-2017  CEA/DEN, EDF R&D
+// Copyright (C) 2014-2019  CEA/DEN, EDF R&D
 //
 // This library is free software; you can redistribute it and/or
 // modify it under the terms of the GNU Lesser General Public
 //
 // You should have received a copy of the GNU Lesser General Public
 // License along with this library; if not, write to the Free Software
-// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 //
-// See http://www.salome-platform.org/ or
-// email : webmaster.salome@opencascade.com<mailto:webmaster.salome@opencascade.com>
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
 //
 
 #include "Model_AttributeSelection.h"
@@ -23,7 +22,6 @@
 #include "Model_Events.h"
 #include "Model_Data.h"
 #include "Model_Document.h"
-#include "Model_SelectionNaming.h"
 #include <Model_Objects.h>
 #include <Model_AttributeSelectionList.h>
 #include <Model_ResultConstruction.h>
@@ -31,6 +29,7 @@
 #include <ModelAPI_ResultBody.h>
 #include <ModelAPI_ResultBody.h>
 #include <ModelAPI_ResultConstruction.h>
+#include <ModelAPI_ResultGroup.h>
 #include <ModelAPI_ResultPart.h>
 #include <ModelAPI_CompositeFeature.h>
 #include <ModelAPI_Tools.h>
 #include <Events_InfoMessage.h>
 #include <GeomAPI_Edge.h>
 #include <GeomAPI_Pnt.h>
+#include <GeomAPI_ShapeIterator.h>
 #include <GeomAPI_Vertex.h>
+#include <GeomAPI_ShapeExplorer.h>
 #include <GeomAlgoAPI_CompoundBuilder.h>
 #include <GeomAlgoAPI_NExplode.h>
 #include <Selector_Selector.h>
 
-#include <TNaming_Selector.hxx>
 #include <TNaming_NamedShape.hxx>
 #include <TNaming_Tool.hxx>
 #include <TNaming_Builder.hxx>
 #include <TNaming_SameShapeIterator.hxx>
+#include <TNaming_NewShapeIterator.hxx>
 #include <TNaming_Iterator.hxx>
 #include <TDataStd_Integer.hxx>
 #include <TDataStd_UAttribute.hxx>
@@ -60,6 +61,7 @@
 #include <TopExp_Explorer.hxx>
 #include <BRep_Tool.hxx>
 #include <TopoDS.hxx>
+#include <TopoDS_Edge.hxx>
 #include <TopExp.hxx>
 #include <TDF_ChildIterator.hxx>
 #include <TDF_ChildIDIterator.hxx>
@@ -67,6 +69,7 @@
 #include <TDF_ChildIDIterator.hxx>
 #include <Geom_Circle.hxx>
 #include <Geom_Ellipse.hxx>
+#include <Geom_TrimmedCurve.hxx>
 #include <BRep_Builder.hxx>
 
 //#define DEB_NAMING 1
@@ -89,10 +92,6 @@ Standard_GUID kCIRCLE_CENTER("d0d0e0f1-217a-4b95-8fbb-0c4132f23718");
 Standard_GUID kELLIPSE_CENTER1("f70df04c-3168-4dc9-87a4-f1f840c1275d");
 // identifier of the selection of the second focus point of ellipse on edge
 Standard_GUID kELLIPSE_CENTER2("1395ae73-8e02-4cf8-b204-06ff35873a32");
-// identifier of the weak naming index
-Standard_GUID kWEAK_NAMING("9dcdd9be-a3a9-46eb-9b16-1c957ab20142");
-// identifier of the weak naming sub-shape type
-Standard_GUID kWEAK_NAMING_SHAPETYPE("6b9cc709-e320-4a1f-9c42-df5622369ea7");
 
 // prefix for the whole feature context identification
 const static std::string kWHOLE_FEATURE = "all-in-";
@@ -106,10 +105,9 @@ const static std::string kWHOLE_FEATURE = "all-in-";
 bool Model_AttributeSelection::setValue(const ObjectPtr& theContext,
   const std::shared_ptr<GeomAPI_Shape>& theSubShape, const bool theTemporarily)
 {
-  if (theTemporarily &&
-      (!theContext.get() || theContext->groupName() != ModelAPI_Feature::group())) {
+  if (theTemporarily) {
     // just keep the stored without DF update
-    myTmpContext = std::dynamic_pointer_cast<ModelAPI_Result>(theContext);
+    myTmpContext = theContext;
     myTmpSubShape = theSubShape;
     owner()->data()->sendAttributeUpdated(this);
     return true;
@@ -132,15 +130,13 @@ bool Model_AttributeSelection::setValue(const ObjectPtr& theContext,
     myRef.setValue(theContext);
   }
 
-  // do noth use naming if selected shape is result shape itself, but not sub-shape
+  // do not use naming if selected shape is result shape itself, but not sub-shape
   TDF_Label aSelLab = selectionLabel();
   aSelLab.ForgetAttribute(kSIMPLE_REF_ID);
   aSelLab.ForgetAttribute(kINVALID_SELECTION);
   aSelLab.ForgetAttribute(kCIRCLE_CENTER);
   aSelLab.ForgetAttribute(kELLIPSE_CENTER1);
   aSelLab.ForgetAttribute(kELLIPSE_CENTER2);
-  aSelLab.ForgetAttribute(kWEAK_NAMING);
-  aSelLab.ForgetAttribute(kWEAK_NAMING_SHAPETYPE);
 
   bool isDegeneratedEdge = false;
   // do not use the degenerated edge as a shape, a null context and shape is used in the case
@@ -182,20 +178,18 @@ bool Model_AttributeSelection::setValue(const ObjectPtr& theContext,
     std::shared_ptr<GeomAPI_Shape> aSubShape;
     if (theSubShape.get() && !aConstruction->shape()->isEqual(theSubShape))
       aSubShape = theSubShape; // the whole context
-    if (aConstruction->isInfinite()) {
-      // For correct naming selection, put the shape into the naming structure.
-      // It seems sub-shapes are not needed: only this shape is (and can be) selected.
-      TNaming_Builder aBuilder(aSelLab);
-      aBuilder.Generated(aConstruction->shape()->impl<TopoDS_Shape>());
-    }
   } else if (theContext->groupName() == ModelAPI_ResultPart::group()) {
     aSelLab.ForgetAllAttributes(true);
     TDataStd_UAttribute::Set(aSelLab, kPART_REF_ID);
     selectPart(std::dynamic_pointer_cast<ModelAPI_Result>(theContext), theSubShape);
-  } else { // check the feature context: parent-Part of this feature should not be used
+  } else if (theContext->groupName() == ModelAPI_ResultGroup::group()) {
+    aSelLab.ForgetAllAttributes(true);
+    TDataStd_UAttribute::Set(aSelLab, kSIMPLE_REF_ID);
+  } else { // check the feature context: only construction features of PartSet could be selected
     FeaturePtr aFeatureContext = std::dynamic_pointer_cast<ModelAPI_Feature>(theContext);
-    if (aFeatureContext.get()) {
-      if (owner()->document() != aFeatureContext->document()) {
+    if (aFeatureContext.get() && owner()->document() != aFeatureContext->document()) {
+      if (aFeatureContext->results().empty() ||
+          aFeatureContext->firstResult()->groupName() != ModelAPI_ResultConstruction::group()) {
         aSelLab.ForgetAllAttributes(true);
         myRef.setValue(ObjectPtr());
         if (aToUnblock)
@@ -267,7 +261,7 @@ void Model_AttributeSelection::removeTemporaryValues()
   }
 }
 
-// returns the center of the edge: circular or elliptical
+// returns the center of the edge: circular or elliptic
 GeomShapePtr centerByEdge(GeomShapePtr theEdge, ModelAPI_AttributeSelection::CenterType theType)
 {
   if (theType != ModelAPI_AttributeSelection::NOT_CENTER && theEdge.get() != NULL) {
@@ -280,11 +274,15 @@ GeomShapePtr centerByEdge(GeomShapePtr theEdge, ModelAPI_AttributeSelection::Cen
         TopoDS_Vertex aVertex;
         BRep_Builder aBuilder;
         if (theType == ModelAPI_AttributeSelection::CIRCLE_CENTER) {
+          while(!aCurve.IsNull() && aCurve->DynamicType() == STANDARD_TYPE(Geom_TrimmedCurve))
+            aCurve = Handle(Geom_TrimmedCurve)::DownCast(aCurve)->BasisCurve();
           Handle(Geom_Circle) aCirc = Handle(Geom_Circle)::DownCast(aCurve);
           if (!aCirc.IsNull()) {
             aBuilder.MakeVertex(aVertex, aCirc->Location(), Precision::Confusion());
           }
         } else { // ellipse
+          while(!aCurve.IsNull() && aCurve->DynamicType() == STANDARD_TYPE(Geom_TrimmedCurve))
+            aCurve = Handle(Geom_TrimmedCurve)::DownCast(aCurve)->BasisCurve();
           Handle(Geom_Ellipse) anEll = Handle(Geom_Ellipse)::DownCast(aCurve);
           if (!anEll.IsNull()) {
             aBuilder.MakeVertex(aVertex,
@@ -305,7 +303,7 @@ GeomShapePtr centerByEdge(GeomShapePtr theEdge, ModelAPI_AttributeSelection::Cen
 
 std::shared_ptr<GeomAPI_Shape> Model_AttributeSelection::value()
 {
-  if (!ModelAPI_AttributeSelection::isInitialized() && !myTmpContext.get() && !myTmpSubShape.get())
+  if (!myRef.isInitialized() && !myTmpContext.get() && !myTmpSubShape.get())
     return std::shared_ptr<GeomAPI_Shape>();
   CenterType aType = NOT_CENTER;
   std::shared_ptr<GeomAPI_Shape> aResult = internalValue(aType);
@@ -324,7 +322,14 @@ std::shared_ptr<GeomAPI_Shape> Model_AttributeSelection::internalValue(CenterTyp
       // it is just reference to construction.
       return myTmpSubShape;
     }
-    return myTmpSubShape.get() ? myTmpSubShape : myTmpContext->shape();
+    FeaturePtr aFeature =
+      std::dynamic_pointer_cast<ModelAPI_Feature>(myTmpContext);
+    if (aFeature.get()) {
+      // it is just reference to construction.
+      return myTmpSubShape;
+    }
+    return myTmpSubShape.get() ? myTmpSubShape :
+      std::dynamic_pointer_cast<ModelAPI_Result>(myTmpContext)->shape();
   }
 
   TDF_Label aSelLab = selectionLabel();
@@ -342,8 +347,8 @@ std::shared_ptr<GeomAPI_Shape> Model_AttributeSelection::internalValue(CenterTyp
   if (myRef.isInitialized()) {
     if (aSelLab.IsAttribute(kSIMPLE_REF_ID)) { // it is just reference to shape, not sub-shape
       ResultPtr aContext = context();
-      if (!aContext.get())
-        return aResult; // empty result
+      if (!aContext.get() || aContext->groupName() == ModelAPI_ResultConstruction::group())
+        return aResult; // empty result, for whole construction selection also
       return aContext->shape();
     }
     if (aSelLab.IsAttribute(kPART_REF_ID)) {
@@ -392,30 +397,10 @@ std::shared_ptr<GeomAPI_Shape> Model_AttributeSelection::internalValue(CenterTyp
         }
         return GeomAlgoAPI_CompoundBuilder::compound(allShapes);
       }
-    }
-
-    if (aSelLab.IsAttribute(kWEAK_NAMING)) { // a weak naming is used
-      Handle(TDataStd_Integer) aWeakId;
-      aSelLab.FindAttribute(kWEAK_NAMING, aWeakId);
-      // get the context shape
-      GeomShapePtr aContextShape;
-      ResultBodyPtr aBody = std::dynamic_pointer_cast<ModelAPI_ResultBody>(context());
-      if (aBody.get()) {
-        aContextShape = aBody->shape();
-      } else {
-        ResultPtr aResult = std::dynamic_pointer_cast<ModelAPI_Result>(myRef.value());
-        if (aResult) {
-          aContextShape = aResult->shape();
-        }
+    } else {
+      if (contextFeature().get()) {
+        return aResult; // for the whole sketch feature selected return null => all faces
       }
-      if (!aContextShape.get())
-        return GeomShapePtr();
-      Handle(TDataStd_Integer) aWeakShapeType;
-      aSelLab.FindAttribute(kWEAK_NAMING_SHAPETYPE, aWeakShapeType);
-      GeomAlgoAPI_NExplode aNExplode(
-        aContextShape, GeomAPI_Shape::ShapeType(aWeakShapeType->Get()));
-      GeomShapePtr aValue = aNExplode.shape(aWeakId->Get());
-      return aValue;
     }
 
     Handle(TNaming_NamedShape) aSelection;
@@ -437,35 +422,37 @@ bool Model_AttributeSelection::isInvalid()
 
 bool Model_AttributeSelection::isInitialized()
 {
-  if (ModelAPI_AttributeSelection::isInitialized()) { // additional checks if it is initialized
-    std::shared_ptr<GeomAPI_Shape> aResult;
-    if (myRef.isInitialized()) {
-      TDF_Label aSelLab = selectionLabel();
-      if (aSelLab.IsAttribute(kSIMPLE_REF_ID)) { // it is just reference to shape, not sub-shape
-        ResultPtr aContext = context();
-        return aContext.get() != NULL;
-      }
-      Handle(TNaming_NamedShape) aSelection;
-      if (selectionLabel().FindAttribute(TNaming_NamedShape::GetID(), aSelection)) {
-        return !aSelection->Get().IsNull();
-      } else { // for simple construction element: just shape of this construction element
-        std::shared_ptr<Model_ResultConstruction> aConstr =
-          std::dynamic_pointer_cast<Model_ResultConstruction>(context());
-        if (aConstr.get()) {
-            return true;
-        }
-        // for the whole feature, a feature object
-        FeaturePtr aFeat = contextFeature();
-        if (aFeat.get())
-          return true;
-      }
+  if (myRef.isInitialized()) {
+    TDF_Label aSelLab = selectionLabel();
+    // it is just reference to shape, not sub-shape
+    if (aSelLab.IsAttribute(kSIMPLE_REF_ID) || aSelLab.IsAttribute(kPART_REF_ID)) {
+      ResultPtr aContext = context();
+      return aContext.get() != NULL;
+    }
+    Handle(TNaming_NamedShape) aSelection;
+    if (selectionLabel().FindAttribute(TNaming_NamedShape::GetID(), aSelection)) {
+      return !aSelection->Get().IsNull();
+    } else { // for simple construction element: just shape of this construction element
+      if (myRef.value().get())
+        return true;
+      // check that this is on open of document, so, results are not initialized yet
+      TDF_Label aRefLab = myRef.myRef->Get();
+      if (aRefLab.IsNull() || !owner().get())
+        return false;
+      std::shared_ptr<Model_Document> aMyDoc =
+        std::dynamic_pointer_cast<Model_Document>(owner()->document());
+      if (!aMyDoc.get())
+        return false;
+      // check at least the feature exists
+      return aMyDoc->featureByLab(aRefLab).get() != NULL;
     }
   }
   return false;
 }
 
 Model_AttributeSelection::Model_AttributeSelection(TDF_Label& theLabel)
-  : myRef(theLabel)
+: myRef(theLabel),
+  myIsGeometricalSelection(false)
 {
   myIsInitialized = myRef.isInitialized();
   myParent = NULL;
@@ -475,15 +462,23 @@ void Model_AttributeSelection::setID(const std::string theID)
 {
   myRef.setID(theID);
   ModelAPI_AttributeSelection::setID(theID);
+  FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(owner());
+  if (myParent) {
+    // to be able to select as geometrical selection and then - split
+    myIsGeometricalSelection = true; // myParent->isGeometricalSelection();
+  } else {
+    myIsGeometricalSelection =
+      ModelAPI_Session::get()->validators()->isGeometricalSelection(aFeature->getKind(), id());
+  }
 }
 
 ResultPtr Model_AttributeSelection::context()
 {
-  if (!ModelAPI_AttributeSelection::isInitialized() && !myTmpContext.get() && !myTmpSubShape.get())
+  if (!myRef.isInitialized() && !myTmpContext.get() && !myTmpSubShape.get())
     return ResultPtr();
 
   if (myTmpContext.get() || myTmpSubShape.get()) {
-    return myTmpContext;
+    return std::dynamic_pointer_cast<ModelAPI_Result>(myTmpContext);
   }
 
   ResultPtr aResult = std::dynamic_pointer_cast<ModelAPI_Result>(myRef.value());
@@ -496,7 +491,7 @@ ResultPtr Model_AttributeSelection::context()
         if(aPart.get() && aPart->data() == aResult->data()) {
           ResultPtr aPartResult = std::dynamic_pointer_cast<ModelAPI_Result>(aPart);
           FeaturePtr anOwnerFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(owner());
-          // check that this result is not this-feature result (it is forbidden t oselect itself)
+          // check that this result is not this-feature result (it is forbidden tselect itself)
           if(anOwnerFeature.get() && anOwnerFeature->firstResult() != aPartResult) {
             return aPartResult;
           }
@@ -513,8 +508,8 @@ ResultPtr Model_AttributeSelection::context()
 }
 
 FeaturePtr Model_AttributeSelection::contextFeature() {
-  if (myTmpContext.get() || myTmpSubShape.get()) {
-    return FeaturePtr(); // feature can not be selected temporarily
+  if (myTmpContext.get()) {
+    return std::dynamic_pointer_cast<ModelAPI_Feature>(myTmpContext);
   }
   return std::dynamic_pointer_cast<ModelAPI_Feature>(myRef.value());
 }
@@ -532,69 +527,6 @@ void Model_AttributeSelection::setObject(const std::shared_ptr<ModelAPI_Object>&
   myRef.setObject(theObject);
 }
 
-TDF_LabelMap& Model_AttributeSelection::scope()
-{
-  if (myScope.IsEmpty()) { // create a new scope if not yet done
-    // gets all features with named shapes that are before this feature label (before in history)
-    DocumentPtr aMyDoc = owner()->document();
-    std::list<std::shared_ptr<ModelAPI_Feature> > allFeatures = aMyDoc->allFeatures();
-    std::list<std::shared_ptr<ModelAPI_Feature> >::iterator aFIter = allFeatures.begin();
-    bool aMePassed = false;
-    CompositeFeaturePtr aComposite =
-      std::dynamic_pointer_cast<ModelAPI_CompositeFeature>(owner());
-    FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(owner());
-    CompositeFeaturePtr aCompositeOwner, aCompositeOwnerOwner;
-    if (aFeature.get()) {
-      aCompositeOwner = ModelAPI_Tools::compositeOwner(aFeature);
-      if (aCompositeOwner.get()) {
-         aCompositeOwnerOwner = ModelAPI_Tools::compositeOwner(aCompositeOwner);
-      }
-    }
-    // for group Scope is not limitet: this is always up to date objects
-    // this causes problem in galeries.py
-    //bool isGroup = aFeature.get() && aFeature->getKind() == "Group";
-    for(; aFIter != allFeatures.end(); aFIter++) {
-      if (*aFIter == owner()) {  // the left features are created later (except subs of composite)
-        aMePassed = true;
-        continue;
-      }
-      //if (isGroup) aMePassed = false;
-      bool isInScope = !aMePassed;
-      if (!isInScope && aComposite.get()) {
-        // try to add sub-elements of composite if this is composite
-        if (aComposite->isSub(*aFIter))
-          isInScope = true;
-      }
-      // remove the composite-owner of this feature (sketch in extrusion-cut)
-      if (isInScope && (aCompositeOwner == *aFIter || aCompositeOwnerOwner == *aFIter))
-        isInScope = false;
-
-      if (isInScope && aFIter->get() && (*aFIter)->data()->isValid()) {
-        TDF_Label aFeatureLab = std::dynamic_pointer_cast<Model_Data>(
-          (*aFIter)->data())->label().Father();
-        TDF_ChildIDIterator aNSIter(aFeatureLab, TNaming_NamedShape::GetID(), true);
-        for(; aNSIter.More(); aNSIter.Next()) {
-          Handle(TNaming_NamedShape) aNS = Handle(TNaming_NamedShape)::DownCast(aNSIter.Value());
-          if (!aNS.IsNull() && aNS->Evolution() != TNaming_SELECTED) {
-            myScope.Add(aNS->Label());
-          }
-        }
-      }
-    }
-    // also add all naming labels created for external constructions
-    std::shared_ptr<Model_Document> aDoc = std::dynamic_pointer_cast<Model_Document>(aMyDoc);
-    TDF_Label anExtDocLab = aDoc->extConstructionsLabel();
-    TDF_ChildIDIterator aNSIter(anExtDocLab, TNaming_NamedShape::GetID(), true);
-    for(; aNSIter.More(); aNSIter.Next()) {
-      Handle(TNaming_NamedShape) aNS = Handle(TNaming_NamedShape)::DownCast(aNSIter.Value());
-      if (!aNS.IsNull() && aNS->Evolution() != TNaming_SELECTED) {
-        myScope.Add(aNS->Label());
-      }
-    }
-  }
-  return myScope;
-}
-
 /// Sets the invalid flag if flag is false, or removes it if "true"
 /// Returns theFlag
 static bool setInvalidIfFalse(TDF_Label& theLab, const bool theFlag) {
@@ -636,6 +568,7 @@ bool Model_AttributeSelection::update()
 {
   FeaturePtr aContextFeature = contextFeature();
   if (aContextFeature.get()) {
+    owner()->data()->sendAttributeUpdated(this);  // send updated if "update" called in any way
     return true;
   }
   TDF_Label aSelLab = selectionLabel();
@@ -657,29 +590,6 @@ bool Model_AttributeSelection::update()
   }
 
   if (aContext->groupName() == ModelAPI_ResultBody::group()) {
-    if (aSelLab.IsAttribute(kWEAK_NAMING)) { // a weak naming is used
-      Handle(TDataStd_Integer) aWeakId;
-      aSelLab.FindAttribute(kWEAK_NAMING, aWeakId);
-      // get the context shape
-      GeomShapePtr aContextShape;
-      ResultBodyPtr aBody = std::dynamic_pointer_cast<ModelAPI_ResultBody>(aContext);
-      if (aBody.get()) {
-        aContextShape = aBody->shape();
-      } else {
-        ResultPtr aResult = std::dynamic_pointer_cast<ModelAPI_Result>(myRef.value());
-        if (aResult) {
-          aContextShape = aResult->shape();
-        }
-      }
-      if (!setInvalidIfFalse(aSelLab, aContextShape.get() != NULL)) // context shape not found
-        return false;
-      Handle(TDataStd_Integer) aWeakShapeType;
-      aSelLab.FindAttribute(kWEAK_NAMING_SHAPETYPE, aWeakShapeType);
-      GeomAlgoAPI_NExplode aNExplode(
-        aContextShape, GeomAPI_Shape::ShapeType(aWeakShapeType->Get()));
-      GeomShapePtr aValue = aNExplode.shape(aWeakId->Get());
-      return setInvalidIfFalse(aSelLab, aValue.get() != NULL);
-    }
     // body: just a named shape, use topological selection mechanism
     bool aResult = false;
     TopoDS_Shape anOldShape;
@@ -687,31 +597,35 @@ bool Model_AttributeSelection::update()
     if (aSelLab.FindAttribute(TNaming_NamedShape::GetID(), aNS))
       anOldShape = aNS->Get();
 
-    Selector_Selector aSelector(aSelLab);
-    if (!aSelector.restore()) { // it is stored in old OCCT format, use TNaming_Selector
-      TNaming_Selector aSelector(aSelLab);
-      if (!aSelector.NamedShape().IsNull()) {
-        anOldShape = aSelector.NamedShape()->Get();
-      }
-      aResult = aSelector.Solve(scope()) == Standard_True;
-    } else {
-      TopoDS_Shape aContextShape = aContext->shape()->impl<TopoDS_Shape>();
-      aResult = aSelector.solve(aContextShape);
-    }
-    aResult = setInvalidIfFalse(aSelLab, aResult);
+    TopoDS_Shape aContextShape = aContext->shape()->impl<TopoDS_Shape>();
+    Selector_Selector aSelector(aSelLab, baseDocumentLab());
+    aResult = aSelector.restore(aContextShape);
+    bool aWasInvalid = aSelLab.IsAttribute(kINVALID_SELECTION);
+    setInvalidIfFalse(aSelLab, aResult);
 
     TopoDS_Shape aNewShape;
     if (aSelLab.FindAttribute(TNaming_NamedShape::GetID(), aNS))
       aNewShape = aNS->Get();
 
-    if (anOldShape.IsNull() || aNewShape.IsNull() || !anOldShape.IsEqual(aNewShape)) {
-      // shape type shoud not not changed: if shape becomes compound of such shapes, then split
+    if (anOldShape.IsNull() || aNewShape.IsNull() || !anOldShape.IsEqual(aNewShape) || aWasInvalid)
+    {
+      // shape type should not be changed: if shape becomes compound of such shapes, then split
       if (myParent && !anOldShape.IsNull() && !aNewShape.IsNull() &&
           anOldShape.ShapeType() != aNewShape.ShapeType() &&
-          (aNewShape.ShapeType() == TopAbs_COMPOUND || aNewShape.ShapeType() == TopAbs_COMPSOLID))
-      {
+          aNewShape.ShapeType() == TopAbs_COMPOUND) {
         split(aContext, aNewShape, anOldShape.ShapeType());
       }
+      // for issue #3076 check that the new value belongs to the new context
+      if (!aNewShape.IsNull() && !aContextShape.IsNull() &&
+          (aNewShape.ShapeType() == TopAbs_VERTEX || aNewShape.ShapeType() == TopAbs_EDGE ||
+           aNewShape.ShapeType() == TopAbs_FACE)) {
+        TopExp_Explorer anExp(aContextShape, aNewShape.ShapeType());
+        for(; anExp.More(); anExp.Next()) {
+          if (anExp.Current().IsSame(aNewShape))
+            break;
+        }
+        aResult = setInvalidIfFalse(aSelLab, anExp.More());
+      }
       owner()->data()->sendAttributeUpdated(this);  // send updated if shape is changed
     }
     return aResult;
@@ -722,13 +636,15 @@ bool Model_AttributeSelection::update()
     std::shared_ptr<Model_ResultConstruction> aConstructionContext =
       std::dynamic_pointer_cast<Model_ResultConstruction>(aContext);
     if (!aConstructionContext->isInfinite()) {
-      Selector_Selector aSelector(aSelLab);
-      aResult = aSelector.restore();
-      if (aResult) {
-        TopoDS_Shape aContextShape = aContext->shape()->impl<TopoDS_Shape>();
-        aResult = aSelector.solve(aContextShape);
-      }
-      aResult = setInvalidIfFalse(aSelLab, aResult);
+      TopoDS_Shape aContextShape = aContext->shape()->impl<TopoDS_Shape>();
+      Selector_Selector aSelector(aSelLab, baseDocumentLab());
+      TopoDS_Shape anOldShape = aSelector.value();
+      aResult = aSelector.restore(aContextShape);
+      setInvalidIfFalse(aSelLab, aResult);
+      if (aResult && !anOldShape.IsEqual(aSelector.value()))
+        owner()->data()->sendAttributeUpdated(this);  // send updated if shape is changed
+    } else {
+      owner()->data()->sendAttributeUpdated(this);  // send updated if "update" called in any way
     }
     return aResult;
   }
@@ -741,7 +657,7 @@ void Model_AttributeSelection::selectBody(
   // perform the selection
   TopoDS_Shape aContext;
 
-  ResultPtr aBody = std::dynamic_pointer_cast<ModelAPI_Result>(theContext);//myRef.value()
+  ResultPtr aBody = std::dynamic_pointer_cast<ModelAPI_Result>(theContext);
   if (aBody) {
     aContext = aBody->shape()->impl<TopoDS_Shape>();
   } else {
@@ -755,64 +671,25 @@ void Model_AttributeSelection::selectBody(
     }
   }
 
-  // with "recover" feature the selected context may be not up to date (issue 1710)
-  TDF_Label aSelLab = selectionLabel();
-  TopoDS_Shape aNewSub = theSubShape ? theSubShape->impl<TopoDS_Shape>() : aContext;
-
-  /// fix for issue 411: result modified shapes must not participate in this selection mechanism
   if (!aContext.IsNull()) {
-    FeaturePtr aFeatureOwner = std::dynamic_pointer_cast<ModelAPI_Feature>(owner());
-    bool aEraseResults = false;
-    if (aFeatureOwner.get()) {
-      aEraseResults = !aFeatureOwner->results().empty();
-      if (aEraseResults) // erase results without flash deleted and redisplay: do it after Select
-        aFeatureOwner->removeResults(0, false, false);
-    }
+    TDF_Label aSelLab = selectionLabel();
+    TopoDS_Shape aNewSub = theSubShape->impl<TopoDS_Shape>();
+
     bool aSelectorOk = true;
-    //TNaming_Selector aSel(aSelLab);
-    Selector_Selector aSel(aSelLab);
+    Selector_Selector aSelector(aSelLab, baseDocumentLab());
     try {
-      //aSel.Select(aNewSub, aNewContext);
-      aSelectorOk = aSel.select(aContext, aNewSub);
+      aSelectorOk = aSelector.select(aContext, aNewSub, myIsGeometricalSelection);
       if (aSelectorOk) {
-        aSel.store();
-        aSelectorOk = aSel.solve(aContext);
+        aSelectorOk = aSelector.store(aContext);
       }
     } catch(...) {
       aSelectorOk = false;
     }
-    // face may become divided after the model update, so, new labels may be added to the scope
-    myScope.Clear();
-
-    // check that selection is correct, otherwise use weak naming solution
-    TDF_Label aSelLab = selectionLabel();
-    aSelLab.ForgetAttribute(kWEAK_NAMING);
-    Handle(TNaming_NamedShape) aSelectorShape;
-    if (aSelectorOk && aSelLab.FindAttribute(TNaming_NamedShape::GetID(), aSelectorShape))
-    {
-      TopoDS_Shape aShape = aSelectorShape->Get();
-      if (aShape.IsNull() || aShape.ShapeType() != aNewSub.ShapeType())
-        aSelectorOk = false;
-    }
-    if (!aSelectorOk) { // weak naming identifier instead
-      GeomShapePtr aContextShape(new GeomAPI_Shape);
-      aContextShape->setImpl<TopoDS_Shape>(new TopoDS_Shape(aContext));
-      GeomShapePtr aValueShape(new GeomAPI_Shape);
-      aValueShape->setImpl<TopoDS_Shape>(new TopoDS_Shape(aNewSub));
-
-      GeomAlgoAPI_NExplode aNExplode(aContextShape, aValueShape->shapeType());
-      int anId = aNExplode.index(aValueShape);
-      if (anId) {
-        TDataStd_Integer::Set(aSelLab, kWEAK_NAMING, anId);
-        TDataStd_Integer::Set(aSelLab, kWEAK_NAMING_SHAPETYPE, int(aValueShape->shapeType()));
-      }
-    }
-
-    if (aEraseResults) { // flash after Select : in Groups it makes selection with shift working
-      static Events_Loop* aLoop = Events_Loop::loop();
-      static const Events_ID kDeletedEvent = aLoop->eventByName(EVENT_OBJECT_DELETED);
-      aLoop->flush(kDeletedEvent);
+    if (aSelectorOk) {
+      TopoDS_Shape aShape = aSelector.value();
+      aSelectorOk = !aShape.IsNull() && aShape.ShapeType() == aNewSub.ShapeType();
     }
+    setInvalidIfFalse(aSelLab, aSelectorOk);
   }
 }
 
@@ -879,31 +756,54 @@ std::string Model_AttributeSelection::namingName(const std::string& theDefaultNa
   if(!this->isInitialized())
     return !theDefaultName.empty() ? theDefaultName : aName;
 
+  // not argument has not parametric name (filters)
+  if (!this->isArgument() || (myParent && !myParent->isArgument())) {
+    GeomShapePtr aShape = value();
+    if (!aShape.get() && context().get())
+      aShape = context()->shape();
+    std::string aName;
+    if (aShape.get()) {
+      aName = aShape->shapeTypeStr();
+      if (myParent) {
+        aName += std::string("_") +
+          TCollection_AsciiString(selectionLabel().Father().Tag()).ToCString();
+      }
+    }
+    return aName;
+  }
+
   CenterType aCenterType = NOT_CENTER;
   std::shared_ptr<GeomAPI_Shape> aSubSh = internalValue(aCenterType);
-  ResultPtr aCont = context();
 
-  if (!aCont.get() ||
-      (aCont->groupName() == ModelAPI_ResultConstruction::group() && contextFeature().get())) {
+  FeaturePtr aContFeature = contextFeature();
+  if (aContFeature.get()) {
+    std::string aResName;
+    // checking part-owner
+    if (aContFeature->document() != owner()->document())
+        aResName += aContFeature->document()->kind() + "/";
     // selection of a full feature
-    FeaturePtr aFeatureCont = contextFeature();
-    if (aFeatureCont.get()) {
-      return kWHOLE_FEATURE + aFeatureCont->name();
+    if (aContFeature.get()) {
+      return aResName + kWHOLE_FEATURE + aContFeature->name();
     }
     // in case of selection of removed result
     return "";
   }
 
+  ResultPtr aCont = context();
   TDF_Label aSelLab = selectionLabel();
   if (aSelLab.IsAttribute(kSIMPLE_REF_ID)) { // whole context, no value
     return contextName(aCont);
   }
 
-  Handle(TDataStd_Integer) aWeakId;
-  if (aSelLab.FindAttribute(kWEAK_NAMING, aWeakId)) { // a weak naming is used
-    std::ostringstream aNameStream;
-    aNameStream<<contextName(aCont)<<"/weak_name_"<<aWeakId->Get();
-    return aNameStream.str();
+  // if it is in result of another part
+  if (aCont->groupName() == ModelAPI_ResultPart::group()) {
+    ResultPartPtr aPart = std::dynamic_pointer_cast<ModelAPI_ResultPart>(aCont);
+    int anIndex;
+    std::string aResult = aSubSh.get() ?
+      aPart->data()->name() + "/" + aPart->nameInPart(aSubSh, anIndex) : aPart->data()->name();
+    if (aCenterType != NOT_CENTER)
+      aResult += centersMap()[aCenterType];
+    return aResult;
   }
 
   // whole infinitive construction
@@ -914,15 +814,10 @@ std::string Model_AttributeSelection::namingName(const std::string& theDefaultNa
     }
   }
 
-  Selector_Selector aSelector(aSelLab);
+  Selector_Selector aSelector(aSelLab, baseDocumentLab());
   std::string aResult;
-  if (aSelector.restore())
+  if (aCont->shape().get() && aSelector.restore(aCont->shape()->impl<TopoDS_Shape>()))
     aResult = aSelector.name(this);
-  /*
-  Model_SelectionNaming aSelNaming(aSelLab);
-  std::string aResult = aSelNaming.namingName(
-    aCont, aSubSh, theDefaultName, owner()->document() != aCont->document());
-    */
   if (aCenterType != NOT_CENTER) {
     aResult += centersMap()[aCenterType];
   }
@@ -960,11 +855,12 @@ void Model_AttributeSelection::selectSubShape(
   // first iteration is selection by name without center prefix, second - in case of problem,
   // try with initial name
   for(int aUseCenter = 1; aUseCenter >= 0; aUseCenter--)  {
-    std::string aSubShapeName = theSubShapeName;
     if (aUseCenter == 0 && aCenterType != NOT_CENTER) {
+      aSubShapeName = theSubShapeName;
       aCenterType = NOT_CENTER;
       aType = theType;
     } else if (aUseCenter != 1) continue;
+    TopAbs_ShapeEnum aShapeType =  TopAbs_ShapeEnum(GeomAPI_Shape::shapeTypeByStr(aType));
 
     std::shared_ptr<Model_Document> aDoc =
       std::dynamic_pointer_cast<Model_Document>(owner()->document());
@@ -977,11 +873,29 @@ void Model_AttributeSelection::selectSubShape(
         aDoc = std::dynamic_pointer_cast<Model_Document>(aRootDoc);
         aSubShapeName = aSubShapeName.substr(aPartEnd + 1);
       } else {
-        ObjectPtr aFound = owner()->document()->objectByName(ModelAPI_ResultPart::group(), aPartName);
+        ObjectPtr aFound =
+          owner()->document()->objectByName(ModelAPI_ResultPart::group(), aPartName);
         if (aFound.get()) { // found such part, so asking it for the name
           ResultPartPtr aPart = std::dynamic_pointer_cast<ModelAPI_ResultPart>(aFound);
-          aDoc = std::dynamic_pointer_cast<Model_Document>(aPart->partDoc());
-          aSubShapeName = aSubShapeName.substr(aPartEnd +1);
+          std::string aNameInPart = aSubShapeName.substr(aPartEnd + 1);
+          if (aNameInPart.empty()) { // whole part
+            setValue(aPart, anEmptyShape);
+            return;
+          }
+          int anIndex;
+          std::shared_ptr<GeomAPI_Shape> aSelected =
+            aPart->shapeInPart(aNameInPart, aType, anIndex);
+          if (aSelected.get()) {
+            if (aCenterType != NOT_CENTER) {
+              if (!aSelected->isEdge())
+                continue;
+              std::shared_ptr<GeomAPI_Edge> aSelectedEdge(new GeomAPI_Edge(aSelected));
+              setValueCenter(aPart, aSelectedEdge, aCenterType);
+            } else
+              setValue(aPart, aSelected);
+            TDataStd_Integer::Set(selectionLabel(), anIndex);
+            return;
+          }
         }
       }
     }
@@ -1000,38 +914,53 @@ void Model_AttributeSelection::selectSubShape(
     // the whole result selection check
     if (aSubShapeName.find('/') == std::string::npos) {
       ObjectPtr aRes = aDoc->objectByName(ModelAPI_ResultConstruction::group(), aSubShapeName);
-      if (!aRes.get())
+      if (!aRes.get()) {
         aRes = aDoc->objectByName(ModelAPI_ResultBody::group(), aSubShapeName);
+        if (!aRes.get())
+          aRes = aDoc->objectByName(ModelAPI_ResultGroup::group(), aSubShapeName);
+      }
       if (aRes.get()) {
         setValue(aRes, anEmptyShape);
         return;
       }
     }
 
-    Selector_Selector aSelector(aDoc->generalLabel());
+    Selector_Selector aSelector(selectionLabel(), baseDocumentLab());
     myRestoreDocument = aDoc;
-    TDF_Label aContextLabel = aSelector.restoreByName(aSubShapeName, this);
+    TDF_Label aContextLabel = aSelector.restoreByName(
+      aSubShapeName, aShapeType, this, myIsGeometricalSelection);
     myRestoreDocument.reset();
     if (!aContextLabel.IsNull()) {
       ResultPtr aContext = aDoc->resultByLab(aContextLabel); // any label for document access
       if (aContext.get() && aContext->shape().get()) {
         TopoDS_Shape aContextShape = aContext->shape()->impl<TopoDS_Shape>();
         if (aSelector.solve(aContextShape)) {
+          TopoDS_Shape aSelectorShape = aSelector.value();
           GeomShapePtr aShapeToBeSelected(new GeomAPI_Shape);
-          aShapeToBeSelected->setImpl<TopoDS_Shape>(new TopoDS_Shape(aSelector.value()));
-          if (aCenterType != NOT_CENTER) {
+          aShapeToBeSelected->setImpl<TopoDS_Shape>(new TopoDS_Shape(aSelectorShape));
+          // make the context result the latest existing
+          aContext = newestContext(aContext, aShapeToBeSelected);
+          if (myIsGeometricalSelection || aCenterType == NOT_CENTER) {
+            // store the currently generated name
+            selectionLabel().ForgetAllAttributes(true);
+            bool aToUnblock = false;
+            aToUnblock = !owner()->data()->blockSendAttributeUpdated(true);
+            myRef.setValue(aContext);
+            aSelector.store(aContextShape);
+            owner()->data()->sendAttributeUpdated(this);
+            if (aToUnblock)
+              owner()->data()->blockSendAttributeUpdated(false);
+            return;
+          } else { // re-select center of circle/arc by context and value
             if (!aShapeToBeSelected->isEdge())
               continue;
             std::shared_ptr<GeomAPI_Edge> aSelectedEdge(new GeomAPI_Edge(aShapeToBeSelected));
             setValueCenter(aContext, aSelectedEdge, aCenterType);
           }
-          else
-            setValue(aContext, aShapeToBeSelected);
           return;
         }
       }
     }
-    aSubShapeName = theSubShapeName;
   }
   // invalid
   TDF_Label aSelLab = selectionLabel();
@@ -1128,59 +1057,17 @@ void Model_AttributeSelection::selectSubShape(const std::string& theType,
   const std::string& theContextName, const int theIndex)
 {
   // selection of context by name
-  //std::string aNamingContextName = theContextName + "/";
-  //selectSubShape(theType, aNamingContextName);
-  std::shared_ptr<Model_Document> aDoc =
-    std::dynamic_pointer_cast<Model_Document>(owner()->document());
-  if (aDoc.get()) {
-    bool aUnique = true;
-    std::string aContextName = theContextName;
-    std::string anEmptySub = "";
-    ResultPtr aContext = aDoc->findByName(aContextName, anEmptySub, aUnique);
-    //ResultPtr aContext = context();
-    if (aContext.get()) {
-      GeomShapePtr aContShape = aContext->shape();
-      if (aContShape.get()) {
-        GeomAlgoAPI_NExplode aNExp(aContShape, GeomAPI_Shape::shapeTypeByStr(theType));
-        GeomShapePtr aValue = aNExp.shape(theIndex);
-        if (aValue.get())
-          setValue(aContext, aValue);
-      }
-    }
-  }
-}
-
-int Model_AttributeSelection::Id()
-{
-  int anID = 0;
-  std::shared_ptr<GeomAPI_Shape> aSelection = value();
-  ResultPtr aContextRes = context();
-  // support for compsolids:
-  while(ModelAPI_Tools::bodyOwner(aContextRes).get()) {
-    aContextRes = ModelAPI_Tools::bodyOwner(aContextRes);
-  }
-  std::shared_ptr<GeomAPI_Shape> aContext = aContextRes->shape();
-
-
-  TopoDS_Shape aMainShape = aContext->impl<TopoDS_Shape>();
-  const TopoDS_Shape& aSubShape = aSelection->impl<TopoDS_Shape>();
-  // searching for the latest main shape
-  if (aSelection && !aSelection->isNull() && aContext && !aContext->isNull())
-  {
-    std::shared_ptr<Model_Document> aDoc =
-      std::dynamic_pointer_cast<Model_Document>(context()->document());
-    if (aDoc.get()) {
-      Handle(TNaming_NamedShape) aNS = TNaming_Tool::NamedShape(aMainShape, aDoc->generalLabel());
-      if (!aNS.IsNull()) {
-        aMainShape = TNaming_Tool::CurrentShape(aNS);
-      }
+  selectSubShape(theType, theContextName);
+  ResultPtr aContext = context();
+  if (aContext.get()) {
+    GeomShapePtr aContShape = aContext->shape();
+    if (aContShape.get()) {
+      GeomAlgoAPI_NExplode aNExp(aContShape, GeomAPI_Shape::shapeTypeByStr(theType));
+      GeomShapePtr aValue = aNExp.shape(theIndex);
+      if (aValue.get())
+        setValue(aContext, aValue);
     }
-
-    TopTools_IndexedMapOfShape aSubShapesMap;
-    TopExp::MapShapes(aMainShape, aSubShapesMap);
-    anID = aSubShapesMap.FindIndex(aSubShape);
   }
-  return anID;
 }
 
 void Model_AttributeSelection::setId(int theID)
@@ -1244,18 +1131,12 @@ void Model_AttributeSelection::computeValues(
 {
   bool aWasWholeContext = theValShape.IsNull();
   if (aWasWholeContext) {
-    //theShapes.Append(theValShape);
-    //return;
     theValShape = theOldContext->shape()->impl<TopoDS_Shape>();
   }
-  //TopoDS_Shape anOldContShape = theOldContext->shape()->impl<TopoDS_Shape>();
+  TopAbs_ShapeEnum aValType = theValShape.ShapeType();
   TopoDS_Shape aNewContShape = theNewContext->shape()->impl<TopoDS_Shape>();
-  //if (anOldContShape.IsSame(theValShape)) { // full context shape substituted by new full context
-    //theShapes.Append(aNewContShape);
-    //return;
-  //}
   // if a new value is unchanged in the new context, do nothing: value is correct
-  TopExp_Explorer aSubExp(aNewContShape, theValShape.ShapeType());
+  TopExp_Explorer aSubExp(aNewContShape, aValType);
   for(; aSubExp.More(); aSubExp.Next()) {
     if (aSubExp.Current().IsSame(theValShape)) {
       theShapes.Append(theValShape);
@@ -1287,9 +1168,9 @@ void Model_AttributeSelection::computeValues(
     for(; aNewContIter != aNewToIterate.end(); aNewContIter++) {
       std::shared_ptr<Model_Data> aNewData =
         std::dynamic_pointer_cast<Model_Data>((*aNewContIter)->data());
-      TDF_Label aNewLab = aNewData->label();
+      TDF_Label aNewLab = aNewData->shapeLab();
       // searching for produced sub-shape fully on some label
-      TDF_ChildIDIterator aNSIter(aNewLab, TNaming_NamedShape::GetID(), Standard_True);
+      TDF_ChildIDIterator aNSIter(aNewLab, TNaming_NamedShape::GetID());
       for(; aNSIter.More(); aNSIter.Next()) {
         Handle(TNaming_NamedShape) aNS = Handle(TNaming_NamedShape)::DownCast(aNSIter.Value());
         for(TNaming_Iterator aPairIter(aNS); aPairIter.More(); aPairIter.Next()) {
@@ -1299,16 +1180,16 @@ void Model_AttributeSelection::computeValues(
                 theShapes.Clear();
                 return;
               }
-              theShapes.Append(aPairIter.NewShape());
+              // don't add edges generated from faces
+              if (aPairIter.NewShape().ShapeType() <= aValType)
+                theShapes.Append(aPairIter.NewShape());
             }
           } else if (!aPairIter.OldShape().IsNull()) { // search shape that contains this sub
-            TopExp_Explorer anExp(aPairIter.OldShape(), theValShape.ShapeType());
+            TopExp_Explorer anExp(aPairIter.OldShape(), aValType);
             for(; anExp.More(); anExp.Next()) {
               if (anExp.Current().IsSame(theValShape)) { // found a new container
-                if (aPairIter.NewShape().IsNull()) {// value was removed
-                  theShapes.Clear();
-                  return;
-                }
+                if (aPairIter.NewShape().IsNull()) // skip removed high-level shape
+                  continue;
                 aNewToOld.Bind(aPairIter.NewShape(), aPairIter.OldShape());
                 anOlds.Add(aPairIter.OldShape());
                 break;
@@ -1320,11 +1201,37 @@ void Model_AttributeSelection::computeValues(
     }
   }
   if (aToFindPart == 2 && !aNewToOld.IsEmpty()) {
-    // map of sub-shapes -> number of occurences of these shapes in containers
+    // also iterate the whole old shape to find not-modified shapes that contain this old
+    TopoDS_Shape anOldContShape = theOldContext->shape()->impl<TopoDS_Shape>();
+    NCollection_Map<TopAbs_ShapeEnum> aNewTypes; // types of shapes to iterate
+    TopTools_DataMapOfShapeShape::Iterator aNewTypeIter(aNewToOld);
+    for(; aNewTypeIter.More(); aNewTypeIter.Next()) {
+      if (aNewTypeIter.Key().ShapeType() != aValType)
+        aNewTypes.Add(aNewTypeIter.Key().ShapeType());
+    }
+    NCollection_Map<TopAbs_ShapeEnum>::Iterator aTypeIter(aNewTypes);
+    for(; aTypeIter.More(); aTypeIter.Next()) {
+      for(TopExp_Explorer anExp(anOldContShape, aTypeIter.Value()); anExp.More(); anExp.Next()) {
+        TopoDS_Shape anOld = anExp.Current();
+        if (aNewToOld.IsBound(anOld) || anOlds.Contains(anOld)) // this was modified
+          continue;
+        TopExp_Explorer aValExp(anOld, aValType);
+        for(; aValExp.More(); aValExp.Next()) {
+          const TopoDS_Shape& anUnchanged = aValExp.Current();
+          if (anUnchanged.IsSame(theValShape)) {
+            aNewToOld.Bind(anOld, anOld);
+            anOlds.Add(anOld);
+            break;
+          }
+        }
+      }
+    }
+
+    // map of sub-shapes -> number of occurrences of these shapes in containers
     NCollection_DataMap<TopoDS_Shape, TopTools_MapOfShape, TopTools_ShapeMapHasher> aSubs;
     TopTools_DataMapOfShapeShape::Iterator aContIter(aNewToOld);
     for(; aContIter.More(); aContIter.Next()) {
-      TopExp_Explorer aSubExp(aContIter.Key(), theValShape.ShapeType());
+      TopExp_Explorer aSubExp(aContIter.Key(), aValType);
       for(; aSubExp.More(); aSubExp.Next()) {
         if (!aSubs.IsBound(aSubExp.Current())) {
           aSubs.Bind(aSubExp.Current(), TopTools_MapOfShape());
@@ -1339,12 +1246,112 @@ void Model_AttributeSelection::computeValues(
       aSubsIter(aSubs);
     for(; aSubsIter.More(); aSubsIter.Next()) {
       if (aSubsIter.Value().Size() == aCountInOld) {
-        theShapes.Append(aSubsIter.Key());
+        TopoDS_Shape anOld = aSubsIter.Key();
+        // check this exists in the new shape
+        TopExp_Explorer aNew(aNewContShape, anOld.ShapeType());
+        for (; aNew.More(); aNew.Next()) {
+          if (aNew.Current().IsSame(anOld))
+            break;
+        }
+        if (aNew.More())
+          theShapes.Append(anOld);
       }
     }
   }
   if (theShapes.IsEmpty()) { // nothing was changed
-    theShapes.Append(aWasWholeContext ? TopoDS_Shape() : theValShape);
+    if (aWasWholeContext)
+      theShapes.Append(TopoDS_Shape());
+    else { // if theValShape exists in new context, add it without changes, otherwise - nothing
+      for (TopExp_Explorer aNew(aNewContShape, aValType); aNew.More(); aNew.Next()){
+        if (aNew.Current().IsSame(theValShape)) {
+          theShapes.Append(theValShape);
+          break;
+        }
+      }
+    }
+  } else if (theShapes.Size() > 1) {
+    // check it is possible to remove extra sub-shapes:
+    // keep only shapes with the same number of containers if possible
+    TopAbs_ShapeEnum anAncType = TopAbs_FACE;
+    if (aValType == TopAbs_VERTEX)
+      anAncType = TopAbs_EDGE;
+    TopoDS_Shape anOldContext = theOldContext->shape()->impl<TopoDS_Shape>();
+    TopTools_IndexedDataMapOfShapeListOfShape anOldMap;
+    TopExp::MapShapesAndUniqueAncestors(anOldContext, aValType,  anAncType, anOldMap);
+    if (anOldMap.Contains(theValShape)) {
+      int aNumInOld = anOldMap.FindFromKey(theValShape).Extent();
+      TopTools_IndexedDataMapOfShapeListOfShape aNewMap;
+      TopExp::MapShapesAndUniqueAncestors(aNewContShape, aValType,  anAncType, aNewMap);
+      TopTools_ListOfShape aNewResults;
+      for(TopTools_ListOfShape::Iterator aNewSubs(theShapes); aNewSubs.More(); aNewSubs.Next()) {
+        TopoDS_Shape aCand = aNewSubs.Value();
+        if (aNewMap.Contains(aCand) && aNewMap.FindFromKey(aCand).Extent() == aNumInOld)
+          aNewResults.Append(aCand);
+      }
+      if (!aNewResults.IsEmpty() && aNewResults.Size() < theShapes.Size())
+        theShapes = aNewResults;
+    }
+  }
+}
+
+
+void Model_AttributeSelection::concealedFeature(
+  const FeaturePtr theFeature, const FeaturePtr theStop, const bool theCheckCopy,
+  std::list<FeaturePtr>& theConcealers, const ResultPtr theResultOfFeature)
+{
+  std::set<FeaturePtr> alreadyProcessed;
+  alreadyProcessed.insert(theFeature);
+  if (theStop.get())
+    alreadyProcessed.insert(theStop);
+  /// iterate all results to find the concealment-attribute
+  std::list<ResultPtr> aRootRes;
+  if (theResultOfFeature.get()) {
+    ResultPtr aRoot = ModelAPI_Tools::bodyOwner(theResultOfFeature, true);
+    aRootRes.push_back(aRoot ? aRoot : theResultOfFeature);
+  } else { // all results of a feature
+   aRootRes = theFeature->results();
+  }
+  std::list<ResultPtr>::const_iterator aRootIter = aRootRes.cbegin();
+  for(; aRootIter != aRootRes.cend(); aRootIter++) {
+    std::list<ResultPtr> allRes;
+    allRes.push_back(*aRootIter);
+    ResultBodyPtr aRootBody = ModelAPI_Tools::bodyOwner(*aRootIter, true);
+    if (!aRootBody.get())
+      aRootBody = std::dynamic_pointer_cast<ModelAPI_ResultBody>(*aRootIter);
+    if (aRootBody.get()) {
+      ModelAPI_Tools::allSubs(aRootBody, allRes);
+    }
+    for(std::list<ResultPtr>::iterator aRIter = allRes.begin(); aRIter != allRes.end(); aRIter++) {
+      const std::set<AttributePtr>& aRefs = (*aRIter)->data()->refsToMe();
+      std::set<AttributePtr>::const_iterator aRef = aRefs.cbegin();
+      for (; aRef != aRefs.cend(); aRef++) {
+        if (!aRef->get() || !(*aRef)->owner().get())
+          continue;
+        // concealed attribute only
+        FeaturePtr aRefFeat = std::dynamic_pointer_cast<ModelAPI_Feature>((*aRef)->owner());
+        if (alreadyProcessed.find(aRefFeat) != alreadyProcessed.end()) // optimization
+          continue;
+        alreadyProcessed.insert(aRefFeat);
+        if (ModelAPI_Session::get()->validators()->isConcealed(aRefFeat->getKind(), (*aRef)->id())
+          || (theCheckCopy &&
+              std::dynamic_pointer_cast<ModelAPI_FeatureCopyInterface>(aRefFeat).get()))
+        {
+          // for extrusion cut in python script the nested sketch reference may be concealed before
+          // it is nested, so, check this composite feature is valid
+          static ModelAPI_ValidatorsFactory* aFactory = ModelAPI_Session::get()->validators();
+          // need to be validated to update the "Apply" state if not previewed
+          if (aFactory->validate(aRefFeat)) {
+            if (theStop.get()) {
+              std::shared_ptr<Model_Document> aDoc =
+                std::dynamic_pointer_cast<Model_Document>(theStop->document());
+              if (!aDoc->isLaterByDep(theStop, aRefFeat)) // skip feature later than stop
+                continue;
+            }
+            theConcealers.push_back(aRefFeat);
+          }
+        }
+      }
+    }
   }
 }
 
@@ -1354,7 +1361,6 @@ bool Model_AttributeSelection::searchNewContext(std::shared_ptr<Model_Document>
   std::list<ResultPtr>& theResults, TopTools_ListOfShape& theValShapes)
 {
   std::set<ResultPtr> aResults; // to avoid duplicates, new context, null if deleted
-  TopTools_ListOfShape aResContShapes;
   // iterate context and shape, but also if it is sub-shape of main shape, check also it
   TopTools_ListOfShape aContextList;
   aContextList.Append(theContShape);
@@ -1381,48 +1387,146 @@ bool Model_AttributeSelection::searchNewContext(std::shared_ptr<Model_Document>
       if (!aModifierFeat.get())
         continue;
       FeaturePtr aThisFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(owner());
-      if (aModifierFeat == aThisFeature || theDoc->objects()->isLater(aModifierFeat, aThisFeature))
+      if (aModifierFeat == aThisFeature || !theDoc->isLaterByDep(aThisFeature, aModifierFeat))
         continue; // the modifier feature is later than this, so, should not be used
       FeaturePtr aCurrentModifierFeat = theDoc->feature(theContext);
       if (aCurrentModifierFeat == aModifierFeat ||
-        theDoc->objects()->isLater(aCurrentModifierFeat, aModifierFeat))
+        !theDoc->isLaterByDep(aModifierFeat, aCurrentModifierFeat))
         continue; // the current modifier is later than the found, so, useless
       Handle(TNaming_NamedShape) aNewNS;
       aModifIter.Label().FindAttribute(TNaming_NamedShape::GetID(), aNewNS);
       if (aNewNS->Evolution() == TNaming_MODIFY || aNewNS->Evolution() == TNaming_GENERATED) {
         aResults.insert(aModifierObj);
-        //TNaming_Iterator aPairIter(aNewNS);
-        //aResContShapes.Append(aPairIter.NewShape());
-        aResContShapes.Append(aModifierObj->shape()->impl<TopoDS_Shape>());
       } else if (aNewNS->Evolution() == TNaming_DELETE) { // a shape was deleted => result is empty
         aResults.insert(ResultPtr());
-      } else { // not-precessed modification => don't support it
+      } else { // not-processed modification => don't support it
         continue;
       }
     }
   }
-  if (aResults.empty())
-    return false; // no modifications found, must stay the same
-  // iterate all results to find futher modifications
+  // if there exist context composite and sub-result(s), leave only sub(s)
+  for(std::set<ResultPtr>::iterator aResIter = aResults.begin(); aResIter != aResults.end();) {
+    ResultPtr aParent = ModelAPI_Tools::bodyOwner(*aResIter);
+    for(; aParent.get(); aParent = ModelAPI_Tools::bodyOwner(aParent))
+      if (aResults.count(aParent))
+        break;
+    if (aParent.get()) { // erase from set, so, restart iteration
+      aResults.erase(aParent);
+      aResIter = aResults.begin();
+    } else aResIter++;
+  }
+
+  bool aStaySame = false;
+  if (aResults.empty()) {
+    // check the context become concealed by operation which is earlier than this selection
+    FeaturePtr aThisFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(owner());
+    FeaturePtr aContextOwner = theDoc->feature(theContext);
+    std::list<FeaturePtr> aConcealers;
+    concealedFeature(aContextOwner, aThisFeature, false, aConcealers, theContext);
+    std::list<FeaturePtr>::iterator aConcealer = aConcealers.begin();
+    for(; aConcealer != aConcealers.end(); aConcealer++) {
+      std::list<ResultPtr> aRefResults;
+      ModelAPI_Tools::allResults(*aConcealer, aRefResults);
+      std::list<ResultPtr>::iterator aRefIter = aRefResults.begin();
+      for(; aRefIter != aRefResults.end(); aRefIter++) {
+        ResultBodyPtr aRefBody = std::dynamic_pointer_cast<ModelAPI_ResultBody>(*aRefIter);
+        if (!aRefBody.get() || aRefBody->numberOfSubs() != 0) // iterate only leafs
+          continue;
+        GeomShapePtr aRefShape = aRefBody->shape();
+        if (!aRefShape.get() || aRefShape->isNull())
+          continue;
+        if (aRefShape->impl<TopoDS_Shape>().IsSame(theContShape)) {
+          // add the new context result with the same shape
+          aResults.insert(aRefBody);
+        }
+      }
+      if (aResults.empty())
+        return true; // feature conceals result, return true, so the context will be removed
+    }
+    aStaySame = aResults.empty();
+  }
+  if (myParent && myParent->isMakeCopy()) {
+    // check there are copies before the new results, so, make a copy
+    std::set<ResultPtr>::iterator aResIter = aResults.begin();
+    std::list<ObjectPtr> aCopyContext;
+    std::list<GeomShapePtr> aCopyVals;
+    // features between the new and the old: check the "Move" interface to get a copy
+    FeaturePtr aRootOwner = theDoc->feature(theContext);
+    FeaturePtr anOwner = ModelAPI_Tools::compositeOwner(aRootOwner);
+    for(; anOwner.get(); anOwner = ModelAPI_Tools::compositeOwner(anOwner))
+      aRootOwner = anOwner;
+    FeaturePtr aThisFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(owner());
+    // iterate all results to find a "Copy" features between the new and one and to add the
+    // copy-results also to results if this attribute refers to the copied shape
+    int anIndex = kUNDEFINED_FEATURE_INDEX;
+    for(FeaturePtr aFeat = theDoc->objects()->nextFeature(aRootOwner, anIndex); aFeat.get() &&
+        aFeat != aThisFeature; aFeat = theDoc->objects()->nextFeature(aFeat, anIndex)) {
+      std::shared_ptr<ModelAPI_FeatureCopyInterface> aCopier =
+        std::dynamic_pointer_cast<ModelAPI_FeatureCopyInterface>(aFeat);
+      if (aCopier.get()) {
+        GeomShapePtr aValShape(new GeomAPI_Shape);
+        aValShape->setImpl<TopoDS_Shape>(new TopoDS_Shape(
+          theValShape.IsNull() ? theContShape : theValShape));
+        aCopier->getCopies(theContext, aValShape, aCopyContext, aCopyVals);
+      }
+    }
+    // check for the further modifications of the copy contexts and values
+    std::list<ObjectPtr>::iterator aCopyContIter = aCopyContext.begin();
+    std::list<GeomShapePtr>::iterator aCopyValIter = aCopyVals.begin();
+    for(; aCopyContIter != aCopyContext.end(); aCopyContIter++, aCopyValIter++) {
+      ResultPtr aNewCont = std::dynamic_pointer_cast<ModelAPI_Result>(*aCopyContIter);
+      TopoDS_Shape aNewContShape = aNewCont->shape()->impl<TopoDS_Shape>();
+      GeomShapePtr aNewVal = *aCopyValIter;
+      TopoDS_Shape aNewValShape;
+      if (aNewVal.get() && !aNewVal->isNull())
+        aNewValShape = aNewVal->impl<TopoDS_Shape>();
+      std::list<ResultPtr> aNewRes;
+      TopTools_ListOfShape aNewUpdatedVal;
+      if (searchNewContext(theDoc, aNewContShape, aNewCont, aNewValShape,
+          theAccessLabel, aNewRes, aNewUpdatedVal)) {
+        // append new results instead of the current ones
+        std::list<ResultPtr>::iterator aNewIter = aNewRes.begin();
+        TopTools_ListIteratorOfListOfShape aNewUpdVal(aNewUpdatedVal);
+        for(; aNewIter != aNewRes.end(); aNewIter++, aNewUpdVal.Next()) {
+          theResults.push_back(*aNewIter);
+          theValShapes.Append(aNewUpdVal.Value());
+        }
+      } else { // the current result is good
+        theResults.push_back(aNewCont);
+        theValShapes.Append(aNewValShape);
+      }
+    }
+    if (aStaySame && !theResults.empty()) { // no changes except copy, so, keep the origin as first
+      theResults.push_front(theContext);
+      theValShapes.Prepend(theValShape);
+      return true;
+    }
+  }
+  if (aStaySame)
+    return false;
+
+  // iterate all results to find further modifications
   std::set<ResultPtr>::iterator aResIter = aResults.begin();
-  for(; aResIter != aResults.end(); aResIter++) {
+  for(aResIter = aResults.begin(); aResIter != aResults.end(); aResIter++) {
     if (aResIter->get() != NULL) {
-      // compute new values by two contextes: the old and the new
+      ResultPtr aNewResObj = *aResIter;
+      // compute new values by two contexts: the old and the new
       TopTools_ListOfShape aValShapes;
-      computeValues(theContext, *aResIter, theValShape, aValShapes);
+      computeValues(theContext, aNewResObj, theValShape, aValShapes);
 
       TopTools_ListIteratorOfListOfShape aNewVal(aValShapes);
       for(; aNewVal.More(); aNewVal.Next()) {
         std::list<ResultPtr> aNewRes;
         TopTools_ListOfShape aNewUpdatedVal;
         TopoDS_Shape aNewValSh = aNewVal.Value();
-        TopoDS_Shape aNewContShape = (*aResIter)->shape()->impl<TopoDS_Shape>();
+        TopoDS_Shape aNewContShape = aNewResObj->shape()->impl<TopoDS_Shape>();
+
         if (theValShape.IsNull() && aNewContShape.IsSame(aNewValSh))
           aNewValSh.Nullify();
-        if (searchNewContext(theDoc, aNewContShape, *aResIter, aNewValSh,
+        if (searchNewContext(theDoc, aNewContShape, aNewResObj, aNewValSh,
                              theAccessLabel, aNewRes, aNewUpdatedVal))
         {
-          // appeand new results instead of the current ones
+          // append new results instead of the current ones
           std::list<ResultPtr>::iterator aNewIter = aNewRes.begin();
           TopTools_ListIteratorOfListOfShape aNewUpdVal(aNewUpdatedVal);
           for(; aNewIter != aNewRes.end(); aNewIter++, aNewUpdVal.Next()) {
@@ -1430,7 +1534,7 @@ bool Model_AttributeSelection::searchNewContext(std::shared_ptr<Model_Document>
             theValShapes.Append(aNewUpdVal.Value());
           }
         } else { // the current result is good
-          theResults.push_back(*aResIter);
+          theResults.push_back(aNewResObj);
           theValShapes.Append(aNewValSh);
         }
       }
@@ -1439,20 +1543,73 @@ bool Model_AttributeSelection::searchNewContext(std::shared_ptr<Model_Document>
   return true; // theResults must be empty: everything is deleted
 }
 
-void Model_AttributeSelection::updateInHistory()
+void Model_AttributeSelection::updateInHistory(bool& theRemove)
 {
+  static std::shared_ptr<GeomAPI_Shape> anEmptyShape;
+
   ResultPtr aContext = std::dynamic_pointer_cast<ModelAPI_Result>(myRef.value());
-  // only bodies and parts may be modified later in the history, don't do anything otherwise
   if (!aContext.get() || (aContext->groupName() != ModelAPI_ResultBody::group() &&
-      aContext->groupName() != ModelAPI_ResultPart::group()))
-    return;
+      aContext->groupName() != ModelAPI_ResultPart::group())) {
+    // but check the case the whole results are allowed: whole features may be selected
+    if (myParent && myParent->isWholeResultAllowed()) {
+      FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(myRef.value());
+      if (aFeature.get()) {
+        FeaturePtr aThisFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(owner());
+        std::list<FeaturePtr> aConcealers;
+        bool aCopyPossible = myParent && myParent->isMakeCopy();
+        concealedFeature(aFeature, aThisFeature, aCopyPossible, aConcealers, ResultPtr());
+        if (aConcealers.empty())
+          return;
+        // if there are copies, but no direct modification, keep the original
+        bool aKeepOrigin = false;
+        if (aCopyPossible) {
+          std::list<FeaturePtr>::iterator aConcealer = aConcealers.begin();
+          for(aKeepOrigin = true; aConcealer != aConcealers.end(); aConcealer++)
+            if (!std::dynamic_pointer_cast<ModelAPI_FeatureCopyInterface>(*aConcealer).get()) {
+              aKeepOrigin = false;
+              break;
+            }
+          if (aKeepOrigin) {
+            aConcealers.push_front(aFeature);
+          }
+        }
+        bool aChanged = false;
+        std::list<FeaturePtr>::iterator aConcealer = aConcealers.begin();
+        for(; aConcealer != aConcealers.end(); aConcealer++)
+          if (aChanged) {
+            if (aKeepOrigin || !myParent->isInList(*aConcealer, anEmptyShape))
+              myParent->append(*aConcealer, anEmptyShape);
+          } else {
+            if (!myParent->isInList(*aConcealer, anEmptyShape)) {// avoid addition of duplicates
+              setValue(*aConcealer, anEmptyShape);
+              aChanged = true;
+            } else if (aCopyPossible && *aConcealer == aFeature) {// keep origin in case of copy
+              aChanged = true;
+            }
+          }
+        if (!aChanged) // remove this
+          theRemove = true;
+        else if (!aKeepOrigin) // searching further modifications only if current changed
+          updateInHistory(theRemove);
+      }
+    }
+    return;// only bodies and parts may be modified later in the history, skip otherwise
+  }
+
   std::shared_ptr<Model_Document> aDoc =
     std::dynamic_pointer_cast<Model_Document>(aContext->document());
   std::shared_ptr<Model_Data> aContData = std::dynamic_pointer_cast<Model_Data>(aContext->data());
   if (!aContData.get() || !aContData->isValid())
     return;
-  TDF_Label aContLab = aContData->label(); // named shape where the selected context is located
+  TDF_Label aContLab = aContData->shapeLab(); // named shape where the selected context is located
+
+  // checking this may be just a reference to another context (same shape), so use that label
   Handle(TNaming_NamedShape) aContNS;
+  Handle(TDF_Reference) aRefAttr;
+  while(!aContLab.FindAttribute(TNaming_NamedShape::GetID(), aContNS) &&
+        aContLab.FindAttribute(TDF_Reference::GetID(), aRefAttr))
+    aContLab = aRefAttr->Get();
+
   if (!aContLab.FindAttribute(TNaming_NamedShape::GetID(), aContNS)) {
     bool aFoundNewContext = true;
     ResultPtr aNewContext = aContext;
@@ -1468,13 +1625,19 @@ void Model_AttributeSelection::updateInHistory()
             // to avoid detection of part changes by local selection only
             AttributeSelectionPtr aSel =
               std::dynamic_pointer_cast<ModelAPI_AttributeSelection>(*aRef);
-            if (aSel.get() && !aSel->value()->isSame(aSel->context()->shape()))
+            if (aSel.get() && aSel->value().get() &&
+                !aSel->value()->isSame(aSel->context()->shape()))
               continue;
 
             FeaturePtr aRefFeat = std::dynamic_pointer_cast<ModelAPI_Feature>((*aRef)->owner());
-            if (aRefFeat.get() && aRefFeat != owner()) {
+
+            if (aRefFeat.get() && aRefFeat != owner() && aRefFeat->firstResult().get()) {
+              // check the reference is concealed: #2900
+              ModelAPI_ValidatorsFactory* aValidators = ModelAPI_Session::get()->validators();
+              if (!aValidators->isConcealed(aRefFeat->getKind(), (*aRef)->id()))
+                continue;
               FeaturePtr aThisFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(owner());
-              if (aDoc->objects()->isLater(aThisFeature, aRefFeat)) { // found better feature
+              if (!aDoc->isLaterByDep(aRefFeat, aThisFeature)) { // found better feature
                 aFoundNewContext = true;
                 aNewContext = aRefFeat->firstResult();
               }
@@ -1511,52 +1674,135 @@ void Model_AttributeSelection::updateInHistory()
   TopTools_ListOfShape aValShapes;
   if (searchNewContext(aDoc, aNewCShape, aContext, aValShape, aContLab, aNewContexts, aValShapes))
   {
-    // update scope to reset to a new one
-    myScope.Clear();
-
-    std::list<ResultPtr>::iterator aNewCont = aNewContexts.begin();
-    TopTools_ListIteratorOfListOfShape aNewValues(aValShapes);
-    if (aNewCont == aNewContexts.end()) { // all results were deleted
-      ResultPtr anEmptyContext;
-      std::shared_ptr<GeomAPI_Shape> anEmptyShape;
-      setValue(anEmptyContext, anEmptyShape); // nullify the selection
-      return;
+    std::set<ResultPtr> allContexts, aSkippedContext;
+    std::list<ResultPtr>::iterator aNewContext = aNewContexts.begin();
+    for(; aNewContext != aNewContexts.end(); aNewContext++)
+      allContexts.insert(*aNewContext);
+
+    // if there exist context composite and sub-result(s), leave only sub(s)
+    std::set<ResultPtr>::iterator aResIter = allContexts.begin();
+    for(; aResIter != allContexts.end(); aResIter++) {
+      ResultPtr aParent = ModelAPI_Tools::bodyOwner(*aResIter);
+      for(; aParent.get(); aParent = ModelAPI_Tools::bodyOwner(aParent))
+        if (allContexts.count(aParent))
+          aSkippedContext.insert(aParent);
     }
 
-    GeomShapePtr aValueShape;
-    if (!aNewValues.Value().IsNull()) {
-      aValueShape = std::make_shared<GeomAPI_Shape>();
-      aValueShape->setImpl<TopoDS_Shape>(new TopoDS_Shape(aNewValues.Value()));
-    }
-    setValue(*aNewCont, aValueShape);
-    // if there are more than one result, put them by "append" into "parent" list
+    GeomAPI_Shape::ShapeType aListShapeType = GeomAPI_Shape::SHAPE;
     if (myParent) {
-      for(aNewCont++, aNewValues.Next(); aNewCont != aNewContexts.end();
-          aNewCont++, aNewValues.Next()) {
-        GeomShapePtr aValueShape;
-        if (!aNewValues.Value().IsNull()) {
-          aValueShape = std::make_shared<GeomAPI_Shape>();
-          aValueShape->setImpl<TopoDS_Shape>(new TopoDS_Shape(aNewValues.Value()));
-        }
+      if (myParent->selectionType() == "VERTEX" || myParent->selectionType() == "Vertices")
+        aListShapeType = GeomAPI_Shape::VERTEX;
+      else if (myParent->selectionType() == "EDGE" || myParent->selectionType() == "Edges")
+        aListShapeType = GeomAPI_Shape::EDGE;
+      else if (myParent->selectionType() == "FACE" || myParent->selectionType() == "Faces")
+        aListShapeType = GeomAPI_Shape::FACE;
+    }
 
-        // Check that list has the same type of shape selection before adding.
-        GeomAPI_Shape::ShapeType aListShapeType = GeomAPI_Shape::SHAPE;
-        if (myParent->selectionType() == "VERTEX") aListShapeType = GeomAPI_Shape::VERTEX;
-        else if (myParent->selectionType() == "EDGE") aListShapeType = GeomAPI_Shape::EDGE;
-        else if (myParent->selectionType() == "FACE") aListShapeType = GeomAPI_Shape::FACE;
-
-        GeomAPI_Shape::ShapeType aShapeShapeType = GeomAPI_Shape::SHAPE;
-        if (aValueShape.get()) {
-          aShapeShapeType = aValueShape->shapeType();
-        } else {
-          (*aNewCont)->shape()->shapeType();
+    // issue #3031: skip topology if there is more convenient shape type presents in the
+    // same context as a result of this
+    bool isWholeResult = myParent && myParent->isWholeResultAllowed() && !aSubShape.get();
+    GeomAPI_Shape::ShapeType allowedType = GeomAPI_Shape::SHAPE;
+    if (isWholeResult) {
+      std::list<ResultPtr>::iterator aNewCont = aNewContexts.begin();
+      TopTools_ListIteratorOfListOfShape aNewValues(aValShapes);
+      for(; aNewCont != aNewContexts.end(); aNewCont++, aNewValues.Next()) {
+        if (aNewValues.Value().IsNull()) { // only for the whole context
+          GeomAPI_Shape::ShapeType aShapeType = (*aNewCont)->shape()->shapeType();
+          if (allowedType == GeomAPI_Shape::SHAPE) { // just set this one
+            allowedType = aShapeType;
+          } else {
+            GeomAPI_Shape::ShapeType anAllowed = allowedType;
+            if (anAllowed != aShapeType) { // select the best, nearest to the origin
+              GeomAPI_Shape::ShapeType anOldShapeType = aContext->shape()->shapeType();
+              GeomAPI_Shape::ShapeType aDeltaAllowed =
+                (GeomAPI_Shape::ShapeType)(anOldShapeType - anAllowed);
+              if (aDeltaAllowed < 0)
+                aDeltaAllowed = (GeomAPI_Shape::ShapeType)(-aDeltaAllowed);
+              GeomAPI_Shape::ShapeType aDeltaThis =
+                (GeomAPI_Shape::ShapeType)(anOldShapeType - aShapeType);
+              if (aDeltaThis < 0)
+                aDeltaThis = (GeomAPI_Shape::ShapeType)(-aDeltaThis);
+              if (aDeltaThis == aDeltaAllowed) { // equal distance to context, select complicated
+                if (anOldShapeType < anAllowed)
+                  allowedType = aShapeType;
+              } else if (aDeltaAllowed > aDeltaThis) { // this wins
+                allowedType = aShapeType;
+              }
+            }
+          }
         }
+      }
+    }
+
+    std::list<ResultPtr>::iterator aNewCont = aNewContexts.begin();
+    TopTools_ListIteratorOfListOfShape aNewValues(aValShapes);
+    bool aFirst = true; // first is set to this, next are appended to parent
+    for(; aNewCont != aNewContexts.end(); aNewCont++, aNewValues.Next()) {
+      if (aSkippedContext.count(*aNewCont))
+        continue;
 
-        if (aListShapeType != GeomAPI_Shape::SHAPE && aListShapeType != aShapeShapeType) {
+      if (isWholeResult && aNewValues.Value().IsNull())
+        if (allowedType != GeomAPI_Shape::SHAPE &&
+            (*aNewCont)->shape()->shapeType() != allowedType)
+          continue; // there is better result exists with the better shape type (issue #3031)
+
+      GeomShapePtr aValueShape;
+      if (!aNewValues.Value().IsNull()) {
+        aValueShape = std::make_shared<GeomAPI_Shape>();
+        aValueShape->setImpl<TopoDS_Shape>(new TopoDS_Shape(aNewValues.Value()));
+      }
+      // Check that list has the same type of shape selection before adding.
+      GeomAPI_Shape::ShapeType aShapeShapeType = GeomAPI_Shape::SHAPE;
+      if (aValueShape.get()) {
+        aShapeShapeType = aValueShape->shapeType();
+      } else {
+        aShapeShapeType = (*aNewCont)->shape()->shapeType();
+      }
+      if (aListShapeType != GeomAPI_Shape::SHAPE && aListShapeType != aShapeShapeType) {
+        // exception is for whole results selected
+        if (!isWholeResult) {
           continue;
         }
+      }
+
+      ResultPtr aNewContext = *aNewCont;
+      if (aValueShape.get()) { // #2892 if context is higher level result, search this sub in lower
+        ResultBodyPtr aBodyContext = std::dynamic_pointer_cast<ModelAPI_ResultBody>(aNewContext);
+        if (aBodyContext.get() && aBodyContext->numberOfSubs() != 0) {
+          std::list<ResultPtr> aLower;
+          ModelAPI_Tools::allSubs(aBodyContext, aLower, true);
+          for(std::list<ResultPtr>::iterator aL = aLower.begin(); aL != aLower.end(); aL++) {
+            GeomShapePtr aLShape = (*aL)->shape();
+            if (aLShape.get() && !aLShape->isNull()) {
+              if (aLShape->isSubShape(aValueShape, false)) {
+                aNewContext = *aL;
+                break;
+              }
+            }
+          }
+        }
+      }
 
-        myParent->append(*aNewCont, aValueShape);
+      if (aFirst) {
+        if (!myParent || !myParent->isInList(aNewContext, aValueShape)) { // avoid duplicates
+          setValue(aNewContext, aValueShape);
+          aFirst = false;
+        } else if (aNewContext == aContext && myParent && myParent->isMakeCopy()) {
+          // this may be exactly the old one, not modified in case of copy
+          aFirst = false;
+        }
+      } else if (myParent) {
+        if (!myParent->isInList(aNewContext, aValueShape)) // avoid addition of duplicates
+          myParent->append(aNewContext, aValueShape);
+      }
+    }
+    if (aFirst) { // nothing was added, all results were deleted
+      if (myParent) {
+        theRemove = true;
+      } else {
+        static ResultPtr anEmptyContext;
+        setValue(anEmptyContext, anEmptyShape); // nullify the selection
+        return;
       }
     }
   }
@@ -1567,16 +1813,17 @@ void Model_AttributeSelection::setParent(Model_AttributeSelectionList* theParent
   myParent = theParent;
 }
 
-bool Model_AttributeSelection::isWeakNaming()
-{
-  return selectionLabel().IsAttribute(kWEAK_NAMING);
-}
-
 std::string Model_AttributeSelection::contextName(const TDF_Label theSelectionLab)
 {
-  DocumentPtr aMyDoc = owner()->document();
-  std::shared_ptr<Model_Document> aDoc = std::dynamic_pointer_cast<Model_Document>(aMyDoc);
+  std::shared_ptr<Model_Document> aDoc = myRestoreDocument.get() ? myRestoreDocument :
+    std::dynamic_pointer_cast<Model_Document>(owner()->document());
   FeaturePtr aFeatureOwner = aDoc->featureByLab(theSelectionLab);
+  bool aBaseDocumnetUsed = false;
+  if (!aFeatureOwner.get()) { // use module document
+    aDoc = std::dynamic_pointer_cast<Model_Document>(ModelAPI_Session::get()->moduleDocument());
+    aFeatureOwner = aDoc->featureByLab(theSelectionLab);
+    aBaseDocumnetUsed = true;
+  }
   if (aFeatureOwner.get()) {
     // if it is sub-element of the sketch, the context name is the name of the sketch
     // searching also for result - real context
@@ -1603,6 +1850,8 @@ std::string Model_AttributeSelection::contextName(const TDF_Label theSelectionLa
         aContextName = "_" + aContextName;
         aNumInHistoryNames--;
       }
+      if (aBaseDocumnetUsed)
+        aContextName = aDoc->kind() + "/" + aContextName;
       return aContextName;
     }
   }
@@ -1629,102 +1878,175 @@ bool Model_AttributeSelection::restoreContext(std::string theName,
   if (aName.empty()) return false;
   bool anUniqueContext = false;
   ResultPtr aCont = aDoc->findByName(aName, aSubShapeName, anUniqueContext);
-  if (!aCont.get() || !aCont->shape().get() || aCont->shape()->isNull())
-    return false;
+  if (!aCont.get() || !aCont->shape().get() || aCont->shape()->isNull()) {
+    // name in PartSet?
+    aDoc = std::dynamic_pointer_cast<Model_Document>(
+      ModelAPI_Session::get()->moduleDocument());
+    if (theName.find(aDoc->kind()) == 0) { // remove the document identifier from name if exists
+      aSubShapeName = theName.substr(aDoc->kind().size() + 1);
+      aName = aSubShapeName;
+      std::string::size_type n = aName.find('/');
+      if (n != std::string::npos) {
+        aName = aName.substr(0, n);
+      }
+    }
+    aCont = aDoc->findByName(aName, aSubShapeName, anUniqueContext);
+    if (!aCont.get() || !aCont->shape().get() || aCont->shape()->isNull())
+      return false;
+  }
 
   // searching the sub-shape
   static const ResultPtr anEmpty;
   theValue = aDoc->findNamingName(aSubShapeName, anUniqueContext ? aCont : anEmpty);
 
-  /* to find the latest lower result that keeps given shape
+  // sketch sub-component shape and name is located in separated feature label, try the sub-name
+  if (theValue.IsNull() && aCont->groupName() == ModelAPI_ResultConstruction::group()) {
+    std::string::size_type aSlash = aSubShapeName.rfind('/');
+    if (aSlash != std::string::npos) {
+      std::string aCompName = aSubShapeName.substr(aSlash + 1);
+      CompositeFeaturePtr aComposite =
+        std::dynamic_pointer_cast<ModelAPI_CompositeFeature>(aDoc->feature(aCont));
+      if (aComposite.get() && aComposite->numberOfSubs()) {
+        const int aSubNum = aComposite->numberOfSubs();
+        for (int a = 0; a < aSubNum && theValue.IsNull(); a++) {
+          FeaturePtr aSub = aComposite->subFeature(a);
+          const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aSub->results();
+          std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRes = aResults.cbegin();
+          for (; aRes != aResults.cend() && theValue.IsNull(); aRes++) {
+            if ((*aRes)->data()->name() == aCompName) {
+              theValue = std::dynamic_pointer_cast<Model_Data>((*aRes)->data())->shapeLab();
+              break;
+            } else { // any sub-label because the sketch line may be renamed, but not sub-vertices
+              TDF_Label aLab = std::dynamic_pointer_cast<Model_Data>((*aRes)->data())->shapeLab();
+              TDF_ChildIDIterator aSubNames(aLab, TDataStd_Name::GetID());
+              for(; aSubNames.More(); aSubNames.Next()) {
+                if (Handle(TDataStd_Name)::DownCast(aSubNames.Value())->Get().
+                  IsEqual(aCompName.c_str())) {
+                  theValue = aSubNames.Value()->Label();
+                  break;
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+
+  if (aCont.get()) {
+    theContext = std::dynamic_pointer_cast<Model_Data>(aCont->data())->label();
+  }
+  return true;
+}
+
+bool Model_AttributeSelection::isLater(
+  const TDF_Label theResult1, const TDF_Label theResult2) const
+{
+  std::shared_ptr<Model_Document> aDoc = myRestoreDocument.get() ? myRestoreDocument :
+    std::dynamic_pointer_cast<Model_Document>(owner()->document());
+  FeaturePtr aFeat1 = aDoc->featureByLab(theResult1);
+  if (!aFeat1.get())
+    return false;
+  FeaturePtr aFeat2 = aDoc->featureByLab(theResult2);
+  if (!aFeat2.get())
+    return false;
+  return aDoc->isLaterByDep(aFeat1, aFeat2);
+}
+
+ResultPtr Model_AttributeSelection::newestContext(
+  const ResultPtr theCurrent, const GeomShapePtr theValue)
+{
+  ResultPtr aResult = theCurrent;
+  GeomShapePtr aSelectedShape = theValue.get() ? theValue : theCurrent->shape();
+  std::shared_ptr<Model_Document> aDoc =
+    std::dynamic_pointer_cast<Model_Document>(owner()->document());
   bool aFindNewContext = true;
-  while(aFindNewContext && aCont.get()) {
+  while (aFindNewContext && aResult.get()) {
     aFindNewContext = false;
     // try to find the last context to find the up to date shape
-    TopoDS_Shape aConShape = aCont->shape()->impl<TopoDS_Shape>();
-    Handle(TNaming_NamedShape) aNS = TNaming_Tool::NamedShape(aConShape, selectionLabel());
-    if (!aNS.IsNull()) {
-      aNS = TNaming_Tool::CurrentNamedShape(aNS);
-      if (!aNS.IsNull() && isOlderThanMe(aNS->Label())) { // scope check is for 2228
-        TDF_Label aLab = aNS->Label();
-        if (aLab.Depth() % 2 == 0)
-          aLab = aLab.Father();
-        ObjectPtr anObj = aDoc->objects()->object(aLab);
-        while (!anObj.get() && aLab.Depth() > 5) {
-          aLab = aLab.Father().Father();
-          anObj = aDoc->objects()->object(aLab);
-        }
-
-        if (anObj.get()) {
-          ResultPtr aRes = std::dynamic_pointer_cast<ModelAPI_Result>(anObj);
-          if (aRes) {
-            aCont = aRes;
-            aFindNewContext = true;
+    TopoDS_Shape aConShape = aResult->shape()->impl<TopoDS_Shape>();
+    if (TNaming_Tool::HasLabel(selectionLabel(), aConShape)) {
+      Handle(TNaming_NamedShape) aNS = TNaming_Tool::NamedShape(aConShape, selectionLabel());
+      if (!aNS.IsNull()) {
+        aNS = TNaming_Tool::CurrentNamedShape(aNS);
+        if (!aNS.IsNull()
+            && isLater(selectionLabel(), aNS->Label())
+            && isLater(aNS->Label(),
+                       std::dynamic_pointer_cast<Model_Data>(aResult->data())->label()))
+        {
+          TDF_Label aLab = aNS->Label();
+          ResultPtr aRes = aDoc->resultByLab(aLab);
+          if (aRes.get()) {
+            if (aRes->shape()->isSubShape(aSelectedShape)) {
+              aResult = aRes;
+              aFindNewContext = true;
+              continue;
+            }
           }
         }
       }
-    } else if (aCont->groupName() == ModelAPI_ResultBody::group()) {
+    }
+
+    // TestFillWireVertex.py - sketch constructions for wire may participate too
+    //if (aResult->groupName() == ModelAPI_ResultBody::group()) {
       // try to search newer context by the concealment references
       // take references to all results: root one, any sub
-      std::list<ResultPtr> allRes;
-      ResultPtr aCompContext;
-      if (aCont->groupName() == ModelAPI_ResultBody::group()) {
-        ResultBodyPtr aCompBody = ModelAPI_Tools::bodyOwner(aCont, true);
-        if (aCompBody.get()) {
-          ModelAPI_Tools::allSubs(aCompBody, allRes);
-          allRes.push_back(aCompBody);
-          aCompContext = aCompBody;
+    std::list<ResultPtr> allRes;
+    ResultPtr aCompContext;
+    ResultBodyPtr aCompBody = ModelAPI_Tools::bodyOwner(aResult, true);
+    if (aCompBody.get()) {
+      ModelAPI_Tools::allSubs(aCompBody, allRes);
+      allRes.push_back(aCompBody);
+      aCompContext = aCompBody;
+    }
+    if (allRes.empty())
+      allRes.push_back(aResult);
+
+    for (std::list<ResultPtr>::iterator aSub = allRes.begin(); aSub != allRes.end(); aSub++) {
+      ResultPtr aResCont = *aSub;
+      ResultBodyPtr aResBody = std::dynamic_pointer_cast<ModelAPI_ResultBody>(aResCont);
+      if (aResBody.get() && aResBody->numberOfSubs() > 0 && aResBody != aCompContext)
+        continue; // only lower and higher level subs are counted
+      const std::set<AttributePtr>& aRefs = aResCont->data()->refsToMe();
+      std::set<AttributePtr>::const_iterator aRef = aRefs.begin();
+      for (; !aFindNewContext && aRef != aRefs.end(); aRef++) {
+        if (!aRef->get() || !(*aRef)->owner().get())
+          continue;
+        // concealed attribute only
+        FeaturePtr aRefFeat = std::dynamic_pointer_cast<ModelAPI_Feature>((*aRef)->owner());
+        if (!ModelAPI_Session::get()->validators()->isConcealed(
+          aRefFeat->getKind(), (*aRef)->id()))
+          continue;
+        // search the feature result that contains sub-shape selected
+        std::list<std::shared_ptr<ModelAPI_Result> > aResults;
+
+        // take all sub-results or one result
+        std::list<ResultPtr> aRefFeatResults;
+        ModelAPI_Tools::allResults(aRefFeat, aRefFeatResults);
+        std::list<ResultPtr>::iterator aRefResIter = aRefFeatResults.begin();
+        for (; aRefResIter != aRefFeatResults.end(); aRefResIter++) {
+          ResultBodyPtr aBody = std::dynamic_pointer_cast<ModelAPI_ResultBody>(*aRefResIter);
+          if (aBody.get() && aBody->numberOfSubs() == 0) // add only lower level subs
+            aResults.push_back(aBody);
         }
-      }
-      if (allRes.empty())
-        allRes.push_back(aCont);
-
-      for(std::list<ResultPtr>::iterator aSub = allRes.begin(); aSub != allRes.end(); aSub++) {
-        ResultPtr aResCont = *aSub;
-        ResultBodyPtr aResBody = std::dynamic_pointer_cast<ModelAPI_ResultBody>(aResCont);
-        if (aResBody.get() && aResBody->numberOfSubs() > 0 && aResBody != aCompContext)
-          continue; // only lower and higher level subs are counted
-        const std::set<AttributePtr>& aRefs = aResCont->data()->refsToMe();
-        std::set<AttributePtr>::const_iterator aRef = aRefs.begin();
-        for(; !aFindNewContext && aRef != aRefs.end(); aRef++) {
-          if (!aRef->get() || !(*aRef)->owner().get())
-            continue;
-          // concealed attribute only
-          FeaturePtr aRefFeat = std::dynamic_pointer_cast<ModelAPI_Feature>((*aRef)->owner());
-          if (!ModelAPI_Session::get()->validators()->isConcealed(
-            aRefFeat->getKind(), (*aRef)->id()))
+        std::list<std::shared_ptr<ModelAPI_Result> >::iterator aResIter = aResults.begin();
+
+        // searching by sub-shape
+        for (; aResIter != aResults.end(); aResIter++) {
+          if (!aResIter->get() || !(*aResIter)->data()->isValid() || (*aResIter)->isDisabled())
             continue;
-          // search the feature result that contains sub-shape selected
-          std::list<std::shared_ptr<ModelAPI_Result> > aResults;
-
-          // take all sub-results or one result
-          std::list<ResultPtr> aRefFeatResults;
-          ModelAPI_Tools::allResults(aRefFeat, aRefFeatResults);
-          std::list<ResultPtr>::iterator aRefResIter = aRefFeatResults.begin();
-          for(; aRefResIter != aRefFeatResults.end(); aRefResIter++) {
-            ResultBodyPtr aBody = std::dynamic_pointer_cast<ModelAPI_ResultBody>(*aRefResIter);
-            if (aBody.get() && aBody->numberOfSubs() == 0) // add only lower level subs
-              aResults.push_back(aBody);
-          }
-          std::list<std::shared_ptr<ModelAPI_Result> >::iterator aResIter = aResults.begin();
-          for(; aResIter != aResults.end(); aResIter++) {
-            if (!aResIter->get() || !(*aResIter)->data()->isValid() || (*aResIter)->isDisabled())
-              continue;
-            GeomShapePtr aShape = (*aResIter)->shape();
-            GeomShapePtr aSelectedShape =
-              aShapeToBeSelected.get() ? aShapeToBeSelected : aCont->shape();
-            if (aShape.get() && aShape->isSubShape(aSelectedShape, false)) {
-              aCont = *aResIter; // found new context (produced from this) with same subshape
-              aFindNewContext = true; // continue searching futher
-              break;
-            }
+          GeomShapePtr aShape = (*aResIter)->shape();
+          if (aShape.get() && aShape->isSubShape(aSelectedShape, false)) {
+            aResult = *aResIter; // found new context (produced from this) with same subshape
+            aFindNewContext = true; // continue searching further
+            break;
           }
         }
       }
     }
   }
   // if compsolid is context, try to take sub-solid as context: like in GUI and scripts
-  ResultBodyPtr aComp = std::dynamic_pointer_cast<ModelAPI_ResultBody>(aCont);
+  ResultBodyPtr aComp = std::dynamic_pointer_cast<ModelAPI_ResultBody>(aResult);
   if (aComp && aComp->numberOfSubs()) {
     std::list<ResultPtr> allSubs;
     ModelAPI_Tools::allSubs(aComp, allSubs);
@@ -1732,15 +2054,72 @@ bool Model_AttributeSelection::restoreContext(std::string theName,
     for (; aS != allSubs.end(); aS++) {
       ResultBodyPtr aSub = std::dynamic_pointer_cast<ModelAPI_ResultBody>(*aS);
       if (aSub && aSub->numberOfSubs() == 0 && aSub->shape().get() &&
-        aSub->shape()->isSubShape(aShapeToBeSelected)) {
-        aCont = aSub;
+          aSub->shape()->isSubShape(aSelectedShape)) {
+        aResult = aSub;
         break;
       }
     }
   }
-  */
-  if (aCont.get()) {
-    theContext = std::dynamic_pointer_cast<Model_Data>(aCont->data())->label();
+  // in case sketch line was selected for wire, but wire was concealed and not such line anymore,
+  // so, actually, the sketch element was selected (which is never concealed)
+  if (aResult != theCurrent && aResult->isConcealed())
+    aResult = theCurrent;
+  return aResult;
+}
+
+void Model_AttributeSelection::combineGeometrical()
+{
+  if (myTmpContext.get() || myTmpSubShape.get())
+    return;
+  TDF_Label aSelLab = selectionLabel();
+  if (aSelLab.IsAttribute(kINVALID_SELECTION) || !myRef.isInitialized())
+    return;
+
+  if (aSelLab.IsAttribute(kCIRCLE_CENTER) || aSelLab.IsAttribute(kELLIPSE_CENTER1) ||
+      aSelLab.IsAttribute(kELLIPSE_CENTER2) || aSelLab.IsAttribute(kSIMPLE_REF_ID))
+    return;
+
+  if (aSelLab.IsAttribute(kPART_REF_ID)) {
+    ResultPartPtr aPart = std::dynamic_pointer_cast<ModelAPI_ResultPart>(context());
+    if (!aPart.get() || !aPart->isActivated())
+      return; // postponed naming needed
+    Handle(TDataStd_Integer) anIndex;
+    if (aSelLab.FindAttribute(TDataStd_Integer::GetID(), anIndex)) {
+      if (anIndex->Get()) { // special selection attribute was created, use it
+        std::string aNewName;
+        aPart->combineGeometrical(anIndex->Get(), aNewName);
+        TDataStd_Name::Set(aSelLab, aNewName.c_str());
+      }
+    }
+    return;
   }
-  return true;
+
+  std::shared_ptr<Model_ResultConstruction> aConstr =
+    std::dynamic_pointer_cast<Model_ResultConstruction>(context());
+  if (aConstr.get())
+    return;
+  FeaturePtr aFeature = contextFeature();
+  if (aFeature.get())
+    return;
+
+  Selector_Selector aSelector(aSelLab, baseDocumentLab());
+  TopoDS_Shape aContextShape = context()->shape()->impl<TopoDS_Shape>();
+  if (aSelector.restore(aContextShape)) {
+    aSelector.combineGeometrical(aContextShape);
+  }
+}
+
+TDF_Label Model_AttributeSelection::baseDocumentLab()
+{
+  if (ModelAPI_Session::get()->moduleDocument() != owner()->document())
+    return std::dynamic_pointer_cast<Model_Document>
+      (ModelAPI_Session::get()->moduleDocument())->extConstructionsLabel();
+  static TDF_Label anEmpty;
+  return anEmpty;
+}
+
+void Model_AttributeSelection::reset()
+{
+  ModelAPI_AttributeSelection::reset();
+  myRef.reset();
 }