diff --git a/apps/opencs/model/world/data.cpp b/apps/opencs/model/world/data.cpp
index dedbfc4e7..9172959bb 100644
--- a/apps/opencs/model/world/data.cpp
+++ b/apps/opencs/model/world/data.cpp
@@ -140,6 +140,8 @@ CSMWorld::Data::Data()
     addModel (new IdTable (&mBirthsigns), UniversalId::Type_Birthsigns, UniversalId::Type_Birthsign);
     addModel (new IdTable (&mSpells), UniversalId::Type_Spells, UniversalId::Type_Spell);
     addModel (new IdTable (&mCells), UniversalId::Type_Cells, UniversalId::Type_Cell);
+    addModel (new IdTable (&mReferenceables), UniversalId::Type_Referenceables,
+        UniversalId::Type_Referenceable);
 }
 
 CSMWorld::Data::~Data()
@@ -268,6 +270,16 @@ CSMWorld::IdCollection<CSMWorld::Cell>& CSMWorld::Data::getCells()
     return mCells;
 }
 
+const CSMWorld::RefIdCollection& CSMWorld::Data::getReferenceables() const
+{
+    return mReferenceables;
+}
+
+CSMWorld::RefIdCollection& CSMWorld::Data::getReferenceables()
+{
+    return mReferenceables;
+}
+
 QAbstractItemModel *CSMWorld::Data::getTableModel (const UniversalId& id)
 {
     std::map<UniversalId::Type, QAbstractItemModel *>::iterator iter = mModelIndex.find (id.getType());
diff --git a/apps/opencs/model/world/data.hpp b/apps/opencs/model/world/data.hpp
index 03a2448f1..ad6e4ba69 100644
--- a/apps/opencs/model/world/data.hpp
+++ b/apps/opencs/model/world/data.hpp
@@ -21,6 +21,7 @@
 #include "idcollection.hpp"
 #include "universalid.hpp"
 #include "cell.hpp"
+#include "refidcollection.hpp"
 
 class QAbstractItemModel;
 
@@ -40,6 +41,7 @@ namespace CSMWorld
             IdCollection<ESM::BirthSign> mBirthsigns;
             IdCollection<ESM::Spell> mSpells;
             IdCollection<Cell> mCells;
+            RefIdCollection mReferenceables;
             std::vector<QAbstractItemModel *> mModels;
             std::map<UniversalId::Type, QAbstractItemModel *> mModelIndex;
 
@@ -104,6 +106,10 @@ namespace CSMWorld
 
             IdCollection<Cell>& getCells();
 
+            const RefIdCollection& getReferenceables() const;
+
+            RefIdCollection& getReferenceables();
+
             QAbstractItemModel *getTableModel (const UniversalId& id);
             ///< If no table model is available for \a id, an exception is thrown.
             ///
diff --git a/apps/opencs/model/world/idcollection.hpp b/apps/opencs/model/world/idcollection.hpp
index 93390c97b..193e4f8e2 100644
--- a/apps/opencs/model/world/idcollection.hpp
+++ b/apps/opencs/model/world/idcollection.hpp
@@ -46,10 +46,12 @@ namespace CSMWorld
 
             virtual void setData (int index, int column, const QVariant& data) = 0;
 
-            virtual void merge() = 0;
+// Not in use. Temporarily removed so that the implementation of RefIdCollection can continue without
+// these functions for now.
+//            virtual void merge() = 0;
             ///< Merge modified into base.
 
-            virtual void purge() = 0;
+//            virtual void purge() = 0;
             ///< Remove records that are flagged as erased.
 
             virtual void removeRows (int index, int count) = 0;