diff --git a/CrossPlatformModules.csproj b/CrossPlatformModules.csproj
index bedf36d76..2dc308c0b 100644
--- a/CrossPlatformModules.csproj
+++ b/CrossPlatformModules.csproj
@@ -144,6 +144,8 @@
     <TypeScriptCompile Include="apps\animations\model.ts" />
     <TypeScriptCompile Include="apps\orientation-demo\main-page.ts" />
     <TypeScriptCompile Include="apps\tests\ui\animation\animation-tests.ts" />
+    <TypeScriptCompile Include="apps\tests\xml-declaration\inherited-base-page.ts" />
+    <TypeScriptCompile Include="apps\tests\xml-declaration\inherited-page.ts" />
     <TypeScriptCompile Include="ui\animation\animation.d.ts" />
     <TypeScriptCompile Include="ui\animation\animation-common.ts">
       <DependentUpon>animation.d.ts</DependentUpon>
@@ -917,6 +919,7 @@
     </Content>
     <Content Include="apps\tests\test-icon.png" />
     <Content Include="apps\tests\ui\style\test.css" />
+    <Content Include="apps\tests\xml-declaration\inherited-page.xml" />
     <Content Include="apps\tests\xml-declaration\mymodulewithxml\my-control-no-js.xml">
       <SubType>Designer</SubType>
     </Content>
@@ -1924,7 +1927,7 @@
           <SaveServerSettingsInUserFile>False</SaveServerSettingsInUserFile>
         </WebProjectProperties>
       </FlavorProperties>
-      <UserProperties ui_2scroll-view_2package_1json__JSONSchema="http://json.schemastore.org/package" apps_2editable-text-demo_2package_1json__JSONSchema="http://json.schemastore.org/package" apps_2absolute-layout-demo_2package_1json__JSONSchema="http://json.schemastore.org/package" apps_2gallery-app_2package_1json__JSONSchema="http://json.schemastore.org/package" ui_2content-view_2package_1json__JSONSchema="http://json.schemastore.org/package" ui_2web-view_2package_1json__JSONSchema="http://json.schemastore.org/package" ui_2layouts_2linear-layout_2package_1json__JSONSchema="http://json.schemastore.org/package" ui_2layouts_2absolute-layout_2package_1json__JSONSchema="http://json.schemastore.org/package" ui_2layouts_2dock-layout_2package_1json__JSONSchema="" ui_2layouts_2grid-layout_2package_1json__JSONSchema="" ui_2layouts_2wrap-layout_2package_1json__JSONSchema="http://json.schemastore.org/package" />
+      <UserProperties ui_2layouts_2wrap-layout_2package_1json__JSONSchema="http://json.schemastore.org/package" ui_2layouts_2grid-layout_2package_1json__JSONSchema="" ui_2layouts_2dock-layout_2package_1json__JSONSchema="" ui_2layouts_2absolute-layout_2package_1json__JSONSchema="http://json.schemastore.org/package" ui_2layouts_2linear-layout_2package_1json__JSONSchema="http://json.schemastore.org/package" ui_2web-view_2package_1json__JSONSchema="http://json.schemastore.org/package" ui_2content-view_2package_1json__JSONSchema="http://json.schemastore.org/package" apps_2gallery-app_2package_1json__JSONSchema="http://json.schemastore.org/package" apps_2absolute-layout-demo_2package_1json__JSONSchema="http://json.schemastore.org/package" apps_2editable-text-demo_2package_1json__JSONSchema="http://json.schemastore.org/package" ui_2scroll-view_2package_1json__JSONSchema="http://json.schemastore.org/package" />
     </VisualStudio>
   </ProjectExtensions>
-</Project>
+</Project>
\ No newline at end of file
diff --git a/ui/core/view.android.ts b/ui/core/view.android.ts
index 47c29c5e4..aa714a38b 100644
--- a/ui/core/view.android.ts
+++ b/ui/core/view.android.ts
@@ -271,14 +271,6 @@ export class View extends viewCommon.View {
     public onMeasure(widthMeasureSpec: number, heightMeasureSpec: number): void {
         var view = this._nativeView;
         if (view) {
-            var width = utils.layout.getMeasureSpecSize(widthMeasureSpec);
-            var widthMode = utils.layout.getMeasureSpecMode(widthMeasureSpec);
-
-            var height = utils.layout.getMeasureSpecSize(heightMeasureSpec);
-            var heightMode = utils.layout.getMeasureSpecMode(heightMeasureSpec);
-
-            trace.write(this + " :onMeasure: " + utils.layout.getMode(widthMode) + " " + width + ", " + utils.layout.getMode(heightMode) + " " + height, trace.categories.Layout);
-
             view.measure(widthMeasureSpec, heightMeasureSpec);
             this.setMeasuredDimension(view.getMeasuredWidth(), view.getMeasuredHeight());
         }
@@ -288,7 +280,6 @@ export class View extends viewCommon.View {
         var view = this._nativeView;
         if (view) {
             this.layoutNativeView(left, top, right, bottom);
-            trace.write(this + " :onLayout: " + left + ", " + top + ", " + (right - left) + ", " + (bottom - top), trace.categories.Layout);
         }
     }
 
diff --git a/ui/core/view.ios.ts b/ui/core/view.ios.ts
index 448b2a730..c020387ce 100644
--- a/ui/core/view.ios.ts
+++ b/ui/core/view.ios.ts
@@ -152,8 +152,6 @@ export class View extends viewCommon.View {
                 height = Number.POSITIVE_INFINITY;
             }
 
-            trace.write(this + " :onMeasure: " + utils.layout.getMode(widthMode) + " " + width + ", " + utils.layout.getMode(heightMode) + " " + height, trace.categories.Layout);
-
             var nativeSize = view.sizeThatFits(CGSizeMake(width, height));
 
             var measureWidth = Math.max(nativeSize.width, this.minWidth);
@@ -167,7 +165,7 @@ export class View extends viewCommon.View {
     }
 
     public onLayout(left: number, top: number, right: number, bottom: number): void {
-        trace.write(this + " :onLayout: " + left + ", " + top + ", " + (right - left) + ", " + (bottom - top), trace.categories.Layout);
+        //
     }
 
     public layoutNativeView(left: number, top: number, right: number, bottom: number): void {
@@ -238,13 +236,6 @@ export class CustomLayoutView extends View {
 
     public onMeasure(widthMeasureSpec: number, heightMeasureSpec: number): void {
         // Don't call super because it will set MeasureDimension. This method must be overriden and calculate its measuredDimensions.
-
-        var width = utils.layout.getMeasureSpecSize(widthMeasureSpec);
-        var widthMode = utils.layout.getMeasureSpecMode(widthMeasureSpec);
-
-        var height = utils.layout.getMeasureSpecSize(heightMeasureSpec);
-        var heightMode = utils.layout.getMeasureSpecMode(heightMeasureSpec);
-        trace.write(this + " :onMeasure: " + utils.layout.getMode(widthMode) + " " + width + ", " + utils.layout.getMode(heightMode) + " " + height, trace.categories.Layout);
     }
 
     public _addViewToNativeVisualTree(child: View, atIndex: number): boolean {
diff --git a/ui/image/image.ios.ts b/ui/image/image.ios.ts
index 138848449..c6b626e7b 100644
--- a/ui/image/image.ios.ts
+++ b/ui/image/image.ios.ts
@@ -71,7 +71,6 @@ export class Image extends imageCommon.Image {
 
         var height = utils.layout.getMeasureSpecSize(heightMeasureSpec);
         var heightMode = utils.layout.getMeasureSpecMode(heightMeasureSpec);
-        trace.write(this + " :onMeasure: " + utils.layout.getMode(widthMode) + " " + width + ", " + utils.layout.getMode(heightMode) + " " + height, trace.categories.Layout);
 
         var nativeWidth = this.imageSource ? this.imageSource.width : 0;
         var nativeHeight = this.imageSource ? this.imageSource.height : 0;
diff --git a/ui/label/label.ios.ts b/ui/label/label.ios.ts
index 42afd0f68..23d84bc35 100644
--- a/ui/label/label.ios.ts
+++ b/ui/label/label.ios.ts
@@ -4,7 +4,6 @@ import dependencyObservable = require("ui/core/dependency-observable");
 import proxy = require("ui/core/proxy");
 import utils = require("utils/utils");
 import viewModule = require("ui/core/view");
-import trace = require("trace");
 
 function onTextWrapPropertyChanged(data: dependencyObservable.PropertyChangeData) {
     var label = <Label>data.object;
@@ -95,8 +94,6 @@ export class Label extends common.Label {
                 height = Number.POSITIVE_INFINITY;
             }
 
-            trace.write(this + " :onMeasure: " + utils.layout.getMode(widthMode) + " " + width + ", " + utils.layout.getMode(heightMode) + " " + height, trace.categories.Layout);
-
             var nativeSize = nativeView.sizeThatFits(CGSizeMake(width, height));
             var labelWidth = nativeSize.width;
             if (!this.textWrap) {
diff --git a/ui/layouts/layout.android.ts b/ui/layouts/layout.android.ts
index f0ac1f3b7..2d9a93123 100644
--- a/ui/layouts/layout.android.ts
+++ b/ui/layouts/layout.android.ts
@@ -55,17 +55,9 @@ export class Layout extends layoutBase.LayoutBase implements definition.Layout {
 
     public onMeasure(widthMeasureSpec: number, heightMeasureSpec: number): void {
         // Don't call super because it will trigger measure again.
-
-        var width = utils.layout.getMeasureSpecSize(widthMeasureSpec);
-        var widthMode = utils.layout.getMeasureSpecMode(widthMeasureSpec);
-
-        var height = utils.layout.getMeasureSpecSize(heightMeasureSpec);
-        var heightMode = utils.layout.getMeasureSpecMode(heightMeasureSpec);
-        trace.write(this + " :onMeasure: " + utils.layout.getMode(widthMode) + " " + width + ", " + utils.layout.getMode(heightMode) + " " + height, trace.categories.Layout);
     }
 
     public onLayout(left: number, top: number, right: number, bottom: number): void {
         // Don't call super because it will trigger layout again.
-        trace.write(this + " :onLayout: " + left + ", " + top + ", " + (right - left) + ", " + (bottom - top), trace.categories.Layout);
     }
 }
\ No newline at end of file
diff --git a/ui/layouts/layout.ios.ts b/ui/layouts/layout.ios.ts
index 34fc13a29..79e1893bf 100644
--- a/ui/layouts/layout.ios.ts
+++ b/ui/layouts/layout.ios.ts
@@ -1,7 +1,5 @@
 import definition = require("ui/layouts/layout");
 import layoutBase = require("ui/layouts/layout-base");
-import trace = require("trace");
-import utils = require("utils/utils");
 
 export class Layout extends layoutBase.LayoutBase implements definition.Layout {
 
@@ -24,12 +22,5 @@ export class Layout extends layoutBase.LayoutBase implements definition.Layout {
 
     public onMeasure(widthMeasureSpec: number, heightMeasureSpec: number): void {
         // Don't call super because it will measure the native element.
-
-        var width = utils.layout.getMeasureSpecSize(widthMeasureSpec);
-        var widthMode = utils.layout.getMeasureSpecMode(widthMeasureSpec);
-
-        var height = utils.layout.getMeasureSpecSize(heightMeasureSpec);
-        var heightMode = utils.layout.getMeasureSpecMode(heightMeasureSpec);
-        trace.write(this + " :onMeasure: " + utils.layout.getMode(widthMode) + " " + width + ", " + utils.layout.getMode(heightMode) + " " + height, trace.categories.Layout);
     }
 }
\ No newline at end of file
diff --git a/ui/list-view/list-view.android.ts b/ui/list-view/list-view.android.ts
index b8d37f9a5..48b29ba84 100644
--- a/ui/list-view/list-view.android.ts
+++ b/ui/list-view/list-view.android.ts
@@ -1,7 +1,7 @@
 import observable = require("data/observable");
 import common = require("ui/list-view/list-view-common");
 import viewModule = require("ui/core/view");
-import layout = require("ui/layouts/layout");
+import layoutBaseModule = require("ui/layouts/layout-base");
 import stackLayout = require("ui/layouts/stack-layout");
 import proxy = require("ui/core/proxy");
 import dependencyObservable = require("ui/core/dependency-observable");
@@ -199,7 +199,7 @@ class ListViewAdapter extends android.widget.BaseAdapter {
 
         if (args.view) {
             if (!args.view.parent) {
-                if (args.view instanceof layout.Layout) {
+                if (args.view instanceof layoutBaseModule.LayoutBase) {
                     this._listView._addView(args.view);
                     convertView = args.view.android;
                 } else {
diff --git a/ui/repeater/repeater.d.ts b/ui/repeater/repeater.d.ts
index 55393ac0b..22f06fcb5 100644
--- a/ui/repeater/repeater.d.ts
+++ b/ui/repeater/repeater.d.ts
@@ -4,7 +4,7 @@
 declare module "ui/repeater" {
     import view = require("ui/core/view");
     import dependencyObservable = require("ui/core/dependency-observable");
-    import layoutModule = require("ui/layouts/layout");
+    import layoutBaseModule = require("ui/layouts/layout-base");
 
     /**
      * Represents a UI Repeater component.
@@ -39,7 +39,7 @@ declare module "ui/repeater" {
         /**
          * Gets or set the items layout of the Repeater. Default value is StackLayout with orientation="vertical".
          */
-        itemsLayout: layoutModule.Layout;
+        itemsLayout: layoutBaseModule.LayoutBase;
 
         /**
          * Forces the Repeater to reload all its items.
diff --git a/ui/repeater/repeater.ts b/ui/repeater/repeater.ts
index ee39f94ad..bd9c18ede 100644
--- a/ui/repeater/repeater.ts
+++ b/ui/repeater/repeater.ts
@@ -6,7 +6,7 @@ import observable = require("data/observable");
 import observableArray = require("data/observable-array");
 import weakEvents = require("ui/core/weak-event-listener");
 import types = require("utils/types");
-import layoutModule = require("ui/layouts/layout");
+import layoutBaseModule = require("ui/layouts/layout-base");
 import stackLayoutModule = require("ui/layouts/stack-layout");
 import builder = require("ui/builder");
 import utils = require("utils/utils");
@@ -93,10 +93,10 @@ export class Repeater extends viewModule.CustomLayoutView implements definition.
         this._setValue(Repeater.itemTemplateProperty, value);
     }
 
-    get itemsLayout(): layoutModule.Layout {
+    get itemsLayout(): layoutBaseModule.LayoutBase {
         return this._getValue(Repeater.itemsLayoutProperty);
     }
-    set itemsLayout(value: layoutModule.Layout) {
+    set itemsLayout(value: layoutBaseModule.LayoutBase) {
         this._setValue(Repeater.itemsLayoutProperty, value);
     }
 
@@ -211,7 +211,7 @@ export class Repeater extends viewModule.CustomLayoutView implements definition.
     }
 }
 
-function clearItemsLayout(itemsLayout: layoutModule.Layout) {
+function clearItemsLayout(itemsLayout: layoutBaseModule.LayoutBase) {
     if (!types.isNullOrUndefined(itemsLayout)) {
         var i: number = itemsLayout.getChildrenCount();
         if (i > 0) {
diff --git a/ui/ui.d.ts b/ui/ui.d.ts
index 73a97e2b6..2f0378630 100644
--- a/ui/ui.d.ts
+++ b/ui/ui.d.ts
@@ -22,6 +22,7 @@ declare module "ui" {
     export * from "ui/image";
     export * from "ui/image-cache";
     export * from "ui/label";
+    export * from "ui/layouts/layout-base";
     export * from "ui/layouts/layout";
     export * from "ui/layouts/absolute-layout";
     export * from "ui/layouts/dock-layout";