[Xaml] cleanup xmlns usage, add XmlnsDefinition (#531)

* [Xaml] cleanup xmlns usage, add XmlnsDefinition

* docs

3 files changed, 117 insertions, 0 deletions

diff --git a/docs/Xamarin.Forms.Core/Xamarin.Forms/XmlnsDefinitionAttribute.xml b/docs/Xamarin.Forms.Core/Xamarin.Forms/XmlnsDefinitionAttribute.xml
new file mode 100644
index 00000000..2c20764b
--- /dev/null
+++ b/docs/Xamarin.Forms.Core/Xamarin.Forms/XmlnsDefinitionAttribute.xml
@@ -0,0 +1,92 @@
+<Type Name="XmlnsDefinitionAttribute" FullName="Xamarin.Forms.XmlnsDefinitionAttribute">
+  <TypeSignature Language="C#" Value="public sealed class XmlnsDefinitionAttribute : Attribute" />
+  <TypeSignature Language="ILAsm" Value=".class public auto ansi sealed beforefieldinit XmlnsDefinitionAttribute extends System.Attribute" />
+  <AssemblyInfo>
+    <AssemblyName>Xamarin.Forms.Core</AssemblyName>
+    <AssemblyVersion>2.0.0.0</AssemblyVersion>
+  </AssemblyInfo>
+  <Base>
+    <BaseTypeName>System.Attribute</BaseTypeName>
+  </Base>
+  <Interfaces />
+  <Attributes>
+    <Attribute>
+      <AttributeName>System.AttributeUsage(System.AttributeTargets.Assembly, AllowMultiple=true)</AttributeName>
+    </Attribute>
+    <Attribute>
+      <AttributeName>System.Diagnostics.DebuggerDisplay("{XmlNamespace}, {ClrNamespace}, {AssemblyName}")</AttributeName>
+    </Attribute>
+  </Attributes>
+  <Docs>
+    <summary>To be added.</summary>
+    <remarks>To be added.</remarks>
+  </Docs>
+  <Members>
+    <Member MemberName=".ctor">
+      <MemberSignature Language="C#" Value="public XmlnsDefinitionAttribute (string xmlNamespace, string clrNamespace);" />
+      <MemberSignature Language="ILAsm" Value=".method public hidebysig specialname rtspecialname instance void .ctor(string xmlNamespace, string clrNamespace) cil managed" />
+      <MemberType>Constructor</MemberType>
+      <AssemblyInfo>
+        <AssemblyVersion>2.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <Parameters>
+        <Parameter Name="xmlNamespace" Type="System.String" />
+        <Parameter Name="clrNamespace" Type="System.String" />
+      </Parameters>
+      <Docs>
+        <param name="xmlNamespace">To be added.</param>
+        <param name="clrNamespace">To be added.</param>
+        <summary>To be added.</summary>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
+    <Member MemberName="AssemblyName">
+      <MemberSignature Language="C#" Value="public string AssemblyName { get; set; }" />
+      <MemberSignature Language="ILAsm" Value=".property instance string AssemblyName" />
+      <MemberType>Property</MemberType>
+      <AssemblyInfo>
+        <AssemblyVersion>2.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <ReturnValue>
+        <ReturnType>System.String</ReturnType>
+      </ReturnValue>
+      <Docs>
+        <summary>To be added.</summary>
+        <value>To be added.</value>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
+    <Member MemberName="ClrNamespace">
+      <MemberSignature Language="C#" Value="public string ClrNamespace { get; }" />
+      <MemberSignature Language="ILAsm" Value=".property instance string ClrNamespace" />
+      <MemberType>Property</MemberType>
+      <AssemblyInfo>
+        <AssemblyVersion>2.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <ReturnValue>
+        <ReturnType>System.String</ReturnType>
+      </ReturnValue>
+      <Docs>
+        <summary>To be added.</summary>
+        <value>To be added.</value>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
+    <Member MemberName="XmlNamespace">
+      <MemberSignature Language="C#" Value="public string XmlNamespace { get; }" />
+      <MemberSignature Language="ILAsm" Value=".property instance string XmlNamespace" />
+      <MemberType>Property</MemberType>
+      <AssemblyInfo>
+        <AssemblyVersion>2.0.0.0</AssemblyVersion>
+      </AssemblyInfo>
+      <ReturnValue>
+        <ReturnType>System.String</ReturnType>
+      </ReturnValue>
+      <Docs>
+        <summary>To be added.</summary>
+        <value>To be added.</value>
+        <remarks>To be added.</remarks>
+      </Docs>
+    </Member>
+  </Members>
+</Type>
diff --git a/docs/Xamarin.Forms.Core/index.xml b/docs/Xamarin.Forms.Core/index.xml
index f13fd562..7d6b9079 100644
--- a/docs/Xamarin.Forms.Core/index.xml
+++ b/docs/Xamarin.Forms.Core/index.xml
@@ -143,6 +143,9 @@
         <Attribute>
           <AttributeName>Xamarin.Forms.Internals.Preserve</AttributeName>
         </Attribute>
+        <Attribute>
+          <AttributeName>Xamarin.Forms.XmlnsDefinition("http://xamarin.com/schemas/2014/forms", "Xamarin.Forms")</AttributeName>
+        </Attribute>
       </Attributes>
     </Assembly>
   </Assemblies>
@@ -438,6 +441,7 @@
       <Type Name="WebView" Kind="Class" />
       <Type Name="WebViewSource" Kind="Class" />
       <Type Name="WebViewSourceTypeConverter" Kind="Class" />
+      <Type Name="XmlnsDefinitionAttribute" Kind="Class" />
     </Namespace>
     <Namespace Name="Xamarin.Forms.Internals">
       <Type Name="CellExtensions" Kind="Class" />
diff --git a/docs/Xamarin.Forms.Xaml/index.xml b/docs/Xamarin.Forms.Xaml/index.xml
index 7f8a955b..6121f09b 100644
--- a/docs/Xamarin.Forms.Xaml/index.xml
+++ b/docs/Xamarin.Forms.Xaml/index.xml
@@ -50,6 +50,27 @@
         <Attribute>
           <AttributeName>Xamarin.Forms.Internals.Preserve</AttributeName>
         </Attribute>
+        <Attribute>
+          <AttributeName>Xamarin.Forms.XmlnsDefinition("http://xamarin.com/schemas/2014/forms", "Xamarin.Forms.Xaml")</AttributeName>
+        </Attribute>
+        <Attribute>
+          <AttributeName>Xamarin.Forms.XmlnsDefinition("http://schemas.microsoft.com/winfx/2006/xaml", "Xamarin.Forms.Xaml")</AttributeName>
+        </Attribute>
+        <Attribute>
+          <AttributeName>Xamarin.Forms.XmlnsDefinition("http://schemas.microsoft.com/winfx/2006/xaml", "System", AssemblyName="mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")</AttributeName>
+        </Attribute>
+        <Attribute>
+          <AttributeName>Xamarin.Forms.XmlnsDefinition("http://schemas.microsoft.com/winfx/2006/xaml", "System", AssemblyName="System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")</AttributeName>
+        </Attribute>
+        <Attribute>
+          <AttributeName>Xamarin.Forms.XmlnsDefinition("http://schemas.microsoft.com/winfx/2009/xaml", "Xamarin.Forms.Xaml")</AttributeName>
+        </Attribute>
+        <Attribute>
+          <AttributeName>Xamarin.Forms.XmlnsDefinition("http://schemas.microsoft.com/winfx/2009/xaml", "System", AssemblyName="mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")</AttributeName>
+        </Attribute>
+        <Attribute>
+          <AttributeName>Xamarin.Forms.XmlnsDefinition("http://schemas.microsoft.com/winfx/2009/xaml", "System", AssemblyName="System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089")</AttributeName>
+        </Attribute>
       </Attributes>
     </Assembly>
   </Assemblies>