diff --git a/SpeckleConnector/Connector.vcxproj b/SpeckleConnector/Connector.vcxproj
index f7874d4..9ac1fc7 100644
--- a/SpeckleConnector/Connector.vcxproj
+++ b/SpeckleConnector/Connector.vcxproj
@@ -127,8 +127,9 @@
     <ClCompile Include="Connector\Interface\Browser\Bridge\Test\TriggerEvent.cpp" />
     <ClCompile Include="Connector\Interface\ConnectorMenu.cpp" />
     <ClCompile Include="Connector\Interface\ConnectorPalette.cpp" />
+    <ClCompile Include="Connector\Record\Collection\FinishProxy.cpp" />
+    <ClCompile Include="Connector\Record\Collection\ProjectCollection.cpp" />
     <ClCompile Include="Connector\Record\Collection\RecordCollection.cpp" />
-    <ClCompile Include="Connector\Record\Collection\RootCollection.cpp" />
     <ClCompile Include="Connector\Record\Model\CardMover.cpp" />
     <ClCompile Include="Connector\Record\Model\CardSetting.cpp" />
     <ClCompile Include="Connector\Record\Model\Filter\DirectSelectionSendFilter.cpp" />
@@ -178,8 +179,9 @@
     <ClInclude Include="Connector\Interface\Browser\Bridge\Test\TriggerEvent.h" />
     <ClInclude Include="Connector\Interface\ConnectorMenu.h" />
     <ClInclude Include="Connector\Interface\ConnectorPalette.h" />
+    <ClInclude Include="Connector\Record\Collection\FinishProxy.h" />
+    <ClInclude Include="Connector\Record\Collection\ProjectCollection.h" />
     <ClInclude Include="Connector\Record\Collection\RecordCollection.h" />
-    <ClInclude Include="Connector\Record\Collection\RootCollection.h" />
     <ClInclude Include="Connector\Record\Model\CardMover.h" />
     <ClInclude Include="Connector\Record\Model\CardSetting.h" />
     <ClInclude Include="Connector\Record\Model\Filter\ArchicadEverythingFilter.h" />
diff --git a/SpeckleConnector/Connector.vcxproj.filters b/SpeckleConnector/Connector.vcxproj.filters
index b363df8..e879d95 100644
--- a/SpeckleConnector/Connector.vcxproj.filters
+++ b/SpeckleConnector/Connector.vcxproj.filters
@@ -207,9 +207,6 @@
     <ClCompile Include="Connector\Record\Collection\RecordCollection.cpp">
       <Filter>Connector\Record\Collection</Filter>
     </ClCompile>
-    <ClCompile Include="Connector\Record\Collection\RootCollection.cpp">
-      <Filter>Connector\Record\Collection</Filter>
-    </ClCompile>
     <ClCompile Include="Connector\Interface\Browser\Bridge\Send\Arg\ConversionResult.cpp">
       <Filter>Connector\Interface\Browser\Bridge\Send\Arg</Filter>
     </ClCompile>
@@ -225,6 +222,12 @@
     <ClCompile Include="Connector\Interface\Browser\Bridge\Send\GetSendSettings.cpp">
       <Filter>Connector\Interface\Browser\Bridge\Send</Filter>
     </ClCompile>
+    <ClCompile Include="Connector\Record\Collection\FinishProxy.cpp">
+      <Filter>Connector\Record\Collection</Filter>
+    </ClCompile>
+    <ClCompile Include="Connector\Record\Collection\ProjectCollection.cpp">
+      <Filter>Connector\Record\Collection</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="Connector\ConnectorResource.h">
@@ -363,9 +366,6 @@
     <ClInclude Include="Connector\Record\Collection\RecordCollection.h">
       <Filter>Connector\Record\Collection</Filter>
     </ClInclude>
-    <ClInclude Include="Connector\Record\Collection\RootCollection.h">
-      <Filter>Connector\Record\Collection</Filter>
-    </ClInclude>
     <ClInclude Include="Connector\Interface\Browser\Bridge\Send\Arg\ConversionResult.h">
       <Filter>Connector\Interface\Browser\Bridge\Send\Arg</Filter>
     </ClInclude>
@@ -381,5 +381,11 @@
     <ClInclude Include="Connector\Interface\Browser\Bridge\Send\GetSendSettings.h">
       <Filter>Connector\Interface\Browser\Bridge\Send</Filter>
     </ClInclude>
+    <ClInclude Include="Connector\Record\Collection\FinishProxy.h">
+      <Filter>Connector\Record\Collection</Filter>
+    </ClInclude>
+    <ClInclude Include="Connector\Record\Collection\ProjectCollection.h">
+      <Filter>Connector\Record\Collection</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/SpeckleLib/Speckle/Database/Content/BIMRecord.h b/SpeckleLib/Speckle/Database/Content/BIMRecord.h
index 8bf5cfc..916cd1c 100644
--- a/SpeckleLib/Speckle/Database/Content/BIMRecord.h
+++ b/SpeckleLib/Speckle/Database/Content/BIMRecord.h
@@ -61,7 +61,7 @@ namespace speckle::database {
 		 Get a link to the BIM record
 		 @return The BIM record link
 		 */
-		BIMLink getBIMLink() const { return BIMLink{ {m_applicationID, m_applicationTableID} }; }
+		BIMLink getBIMLink() const { return BIMLink{ BIMLink::base{m_applicationID, m_applicationTableID} }; }
 		
 		// MARK: - Functions (mutating)
 
diff --git a/SpeckleLib/SpeckleLib17.vcxproj b/SpeckleLib/SpeckleLib17.vcxproj
index 836d23b..c9fc7e8 100644
--- a/SpeckleLib/SpeckleLib17.vcxproj
+++ b/SpeckleLib/SpeckleLib17.vcxproj
@@ -20,6 +20,7 @@
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="Speckle\Database\AccountDatabase.h" />
+    <ClInclude Include="Speckle\Database\BIMAttributeDatabase.h" />
     <ClInclude Include="Speckle\Database\BIMElementDatabase.h" />
     <ClInclude Include="Speckle\Database\Content\BIMRecord.h" />
     <ClInclude Include="Speckle\Database\Content\Record.h" />
@@ -29,6 +30,7 @@
     <ClInclude Include="Speckle\Database\Identity\Index.h" />
     <ClInclude Include="Speckle\Database\Identity\Link.h" />
     <ClInclude Include="Speckle\Database\Storage\ArchicadDBase\ArchicadDBaseCore.h" />
+    <ClInclude Include="Speckle\Database\Storage\ArchicadDBase\Attribute\ArchicadAttributeDBaseEngine.h" />
     <ClInclude Include="Speckle\Database\Storage\ArchicadDBase\Element\ArchicadElementDBaseEngine.h" />
     <ClInclude Include="Speckle\Database\Storage\DocumentStore\DocumentStoreCore.h" />
     <ClInclude Include="Speckle\Database\Storage\DocumentStore\DocumentStoreEngine.h" />
@@ -62,6 +64,9 @@
     <ClInclude Include="Speckle\Interface\Browser\NamedFunction.h" />
     <ClInclude Include="Speckle\Interface\Browser\PlatformBinding.h" />
     <ClInclude Include="Speckle\Primitive\Mesh\Mesh.h" />
+    <ClInclude Include="Speckle\Record\Attribute\Attribute.h" />
+    <ClInclude Include="Speckle\Record\Attribute\Finish.h" />
+    <ClInclude Include="Speckle\Record\Attribute\Storey.h" />
     <ClInclude Include="Speckle\Record\Credentials\Account.h" />
     <ClInclude Include="Speckle\Record\Credentials\ServerInfo.h" />
     <ClInclude Include="Speckle\Record\Credentials\ServerMigration.h" />
@@ -83,11 +88,13 @@
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="Speckle\Database\AccountDatabase.cpp" />
+    <ClCompile Include="Speckle\Database\BIMAttributeDatabase.cpp" />
     <ClCompile Include="Speckle\Database\BIMElementDatabase.cpp" />
     <ClCompile Include="Speckle\Database\Content\BIMRecord.cpp" />
     <ClCompile Include="Speckle\Database\Content\Record.cpp" />
     <ClCompile Include="Speckle\Database\Identity\BIMLink.cpp" />
     <ClCompile Include="Speckle\Database\Storage\ArchicadDBase\ArchicadDBaseCore.cpp" />
+    <ClCompile Include="Speckle\Database\Storage\ArchicadDBase\Attribute\ArchicadAttributeDBaseEngine.cpp" />
     <ClCompile Include="Speckle\Database\Storage\ArchicadDBase\Element\ArchicadElementDBaseEngine.cpp" />
     <ClCompile Include="Speckle\Database\Storage\DocumentStore\DocumentStoreCore.cpp" />
     <ClCompile Include="Speckle\Environment\Addon.cpp" />
@@ -106,6 +113,9 @@
     <ClCompile Include="Speckle\Interface\Browser\Bridge\Functions\GetCallResult.cpp" />
     <ClCompile Include="Speckle\Interface\Browser\Bridge\Functions\RunMethod.cpp" />
     <ClCompile Include="Speckle\Primitive\Mesh\Mesh.cpp" />
+    <ClCompile Include="Speckle\Record\Attribute\Attribute.cpp" />
+    <ClCompile Include="Speckle\Record\Attribute\Finish.cpp" />
+    <ClCompile Include="Speckle\Record\Attribute\Storey.cpp" />
     <ClCompile Include="Speckle\Record\Credentials\Account.cpp" />
     <ClCompile Include="Speckle\Record\Credentials\ServerInfo.cpp" />
     <ClCompile Include="Speckle\Record\Credentials\ServerMigration.cpp" />
diff --git a/SpeckleLib/SpeckleLib17.vcxproj.filters b/SpeckleLib/SpeckleLib17.vcxproj.filters
index 65f51b4..dcbcf05 100644
--- a/SpeckleLib/SpeckleLib17.vcxproj.filters
+++ b/SpeckleLib/SpeckleLib17.vcxproj.filters
@@ -86,6 +86,12 @@
     <Filter Include="Speckle\Serialise\Units">
       <UniqueIdentifier>{7d5ec9ba-bc7e-412c-9b14-16c37b183409}</UniqueIdentifier>
     </Filter>
+    <Filter Include="Speckle\Database\Storage\ArchicadDBase\Attribute">
+      <UniqueIdentifier>{490a65bd-28e3-4282-bb33-67823e81e825}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Speckle\Record\Attribute">
+      <UniqueIdentifier>{525b6bd6-96e4-48c8-91e9-9710e1e54389}</UniqueIdentifier>
+    </Filter>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="Speckle\Environment\Addon.h">
@@ -271,6 +277,21 @@
     <ClInclude Include="Speckle\Serialise\Units\LengthUnit.h">
       <Filter>Speckle\Serialise\Units</Filter>
     </ClInclude>
+    <ClInclude Include="Speckle\Database\BIMAttributeDatabase.h">
+      <Filter>Speckle\Database</Filter>
+    </ClInclude>
+    <ClInclude Include="Speckle\Database\Storage\ArchicadDBase\Attribute\ArchicadAttributeDBaseEngine.h">
+      <Filter>Speckle\Database\Storage\ArchicadDBase\Attribute</Filter>
+    </ClInclude>
+    <ClInclude Include="Speckle\Record\Attribute\Attribute.h">
+      <Filter>Speckle\Record\Attribute</Filter>
+    </ClInclude>
+    <ClInclude Include="Speckle\Record\Attribute\Finish.h">
+      <Filter>Speckle\Record\Attribute</Filter>
+    </ClInclude>
+    <ClInclude Include="Speckle\Record\Attribute\Storey.h">
+      <Filter>Speckle\Record\Attribute</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="Speckle\Environment\Addon.cpp">
@@ -384,6 +405,21 @@
     <ClCompile Include="Speckle\Serialise\Units\LengthUnit.cpp">
       <Filter>Speckle\Serialise\Units</Filter>
     </ClCompile>
+    <ClCompile Include="Speckle\Database\BIMAttributeDatabase.cpp">
+      <Filter>Speckle\Database</Filter>
+    </ClCompile>
+    <ClCompile Include="Speckle\Database\Storage\ArchicadDBase\Attribute\ArchicadAttributeDBaseEngine.cpp">
+      <Filter>Speckle\Database\Storage\ArchicadDBase\Attribute</Filter>
+    </ClCompile>
+    <ClCompile Include="Speckle\Record\Attribute\Attribute.cpp">
+      <Filter>Speckle\Record\Attribute</Filter>
+    </ClCompile>
+    <ClCompile Include="Speckle\Record\Attribute\Finish.cpp">
+      <Filter>Speckle\Record\Attribute</Filter>
+    </ClCompile>
+    <ClCompile Include="Speckle\Record\Attribute\Storey.cpp">
+      <Filter>Speckle\Record\Attribute</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <Text Include="Speckle\CMakeLists.txt">