API for cloning entire resources.

data/attribute/attribute_collection/cloneTest.sbt

+<?xml version="1.0"?>
+<!--Created by XmlV4StringWriter-->
+<SMTK_AttributeResource Version="4">
+  <!--**********  Attribute Definitions ***********-->
+  <Associations />
+  <Definitions>
+    <AttDef Type="doubleFunc" Association="None"/>
+    <AttDef Type="A" Label="A" BaseType="" Unique="false">
+      <AssociationsDef Name="simple" Label="simple" NumberOfRequiredValues="0" Extensible="true">
+        <Accepts>
+          <Resource Name="smtk::markup::Resource" Filter="smtk::markup::UnstructuredData" />
+        </Accepts>
+      </AssociationsDef>      <ItemDefinitions>
+        <Double Name="d0" Label="Optional Double" Optional="true">
+        </Double>
+        <Double Name="d1" Label="Expression Double">
+          <ExpressionType>doubleFunc</ExpressionType>
+        </Double>
+      </ItemDefinitions>
+    </AttDef>
+   </Definitions>
+  <!--**********  Attribute Instances ***********-->
+  <Views>
+    <View Type="Instanced" Title="AttributeResourceCloneTest" Label="Simple Resource Clone Test" TopLevel="true">
+      <InstancedAttributes>
+        <Att Type="A" Name="Test Attribute">
+          <ItemViews>
+            <View Item="d1" ExpressionOnly="true"/>
+          </ItemViews>
+        </Att>
+      </InstancedAttributes>
+    </View>
+  </Views>
+</SMTK_AttributeResource>