diff --git a/src/libs/qmlpuppetcommunication/interfaces/nodeinstanceglobal.h b/src/libs/qmlpuppetcommunication/interfaces/nodeinstanceglobal.h
index 6ade6a92751..ed0104ae54d 100644
--- a/src/libs/qmlpuppetcommunication/interfaces/nodeinstanceglobal.h
+++ b/src/libs/qmlpuppetcommunication/interfaces/nodeinstanceglobal.h
@@ -20,7 +20,8 @@ enum class AuxiliaryDataType {
     Temporary,
     Document,
     NodeInstancePropertyOverwrite,
-    NodeInstanceAuxiliary
+    NodeInstanceAuxiliary,
+    Persistent
 };
 
 enum class View3DActionType {
diff --git a/src/plugins/qmldesigner/CMakeLists.txt b/src/plugins/qmldesigner/CMakeLists.txt
index 33b4df0292f..1ee5b7ca139 100644
--- a/src/plugins/qmldesigner/CMakeLists.txt
+++ b/src/plugins/qmldesigner/CMakeLists.txt
@@ -361,6 +361,7 @@ extend_qtc_library(QmlDesignerCore
     abstractview.cpp
     anchorline.cpp
     annotation.cpp
+    auxiliarypropertystorageview.cpp auxiliarypropertystorageview.h
     bindingproperty.cpp
     componenttextmodifier.cpp
     documentmessage.cpp
diff --git a/src/plugins/qmldesigner/components/componentcore/viewmanager.cpp b/src/plugins/qmldesigner/components/componentcore/viewmanager.cpp
index 1ab5a012b2f..2e6b2b52dbb 100644
--- a/src/plugins/qmldesigner/components/componentcore/viewmanager.cpp
+++ b/src/plugins/qmldesigner/components/componentcore/viewmanager.cpp
@@ -20,17 +20,19 @@
 #include <itemlibraryview.h>
 #include <materialbrowserview.h>
 #include <materialeditorview.h>
+#include <model/auxiliarypropertystorageview.h>
 #include <navigatorview.h>
 #include <nodeinstanceview.h>
 #include <propertyeditorview.h>
+#include <qmldesignerplugin.h>
 #include <rewriterview.h>
 #include <stateseditorview.h>
 #include <texteditorview.h>
 #include <textureeditorview.h>
-#include <qmldesignerplugin.h>
 
 #include <coreplugin/icore.h>
 
+#include <sqlitedatabase.h>
 #include <utils/algorithm.h>
 
 #include <advanceddockingsystem/dockwidget.h>
@@ -49,6 +51,7 @@ public:
     ViewManagerData(AsynchronousImageCache &imageCache,
                     ExternalDependenciesInterface &externalDependencies)
         : debugView{externalDependencies}
+        , auxiliaryDataKeyView{auxiliaryDataDatabase, externalDependencies}
         , designerActionManagerView{externalDependencies}
         , nodeInstanceView(QCoreApplication::arguments().contains("-capture-puppet-stream")
                                ? capturingConnectionManager
@@ -78,6 +81,11 @@ public:
     CapturingConnectionManager capturingConnectionManager;
     QmlModelState savedState;
     Internal::DebugView debugView;
+    Sqlite::Database auxiliaryDataDatabase{
+        Utils::PathString{Core::ICore::userResourcePath("auxiliary_data.db").toString()},
+        Sqlite::JournalMode::Wal,
+        Sqlite::LockingMode::Normal};
+    AuxiliaryPropertyStorageView auxiliaryDataKeyView;
     DesignerActionManagerView designerActionManagerView;
     NodeInstanceView nodeInstanceView;
     ContentLibraryView contentLibraryView;
@@ -201,7 +209,8 @@ QList<AbstractView *> ViewManager::views() const
 QList<AbstractView *> ViewManager::standardViews() const
 {
 #ifndef QTC_USE_QML_DESIGNER_LITE
-    QList<AbstractView *> list = {&d->edit3DView,
+    QList<AbstractView *> list = {&d->auxiliaryDataKeyView,
+                                  &d->edit3DView,
                                   &d->formEditorView,
                                   &d->textEditorView,
                                   &d->assetsLibraryView,
diff --git a/src/plugins/qmldesigner/components/debugview/debugview.cpp b/src/plugins/qmldesigner/components/debugview/debugview.cpp
index e05001e4774..b6f61c9e2d4 100644
--- a/src/plugins/qmldesigner/components/debugview/debugview.cpp
+++ b/src/plugins/qmldesigner/components/debugview/debugview.cpp
@@ -244,6 +244,9 @@ QTextStream &operator<<(QTextStream &stream, AuxiliaryDataType type)
     case AuxiliaryDataType::Temporary:
         stream << "Temporary";
         break;
+    case AuxiliaryDataType::Persistent:
+        stream << "Persistent";
+        break;
     }
 
     return stream;
diff --git a/src/plugins/qmldesigner/designercore/include/model.h b/src/plugins/qmldesigner/designercore/include/model.h
index 39b5cdaa811..98de7bb587f 100644
--- a/src/plugins/qmldesigner/designercore/include/model.h
+++ b/src/plugins/qmldesigner/designercore/include/model.h
@@ -249,6 +249,7 @@ public:
                              const QList<DocumentMessage> &warnings);
 
     QList<ModelNode> selectedNodes(AbstractView *view) const;
+    void setSelectedModelNodes(const QList<ModelNode> &selectedNodeList);
 
     void clearMetaInfoCache();
 
diff --git a/src/plugins/qmldesigner/designercore/include/modelnode.h b/src/plugins/qmldesigner/designercore/include/modelnode.h
index 85b4198b43a..63d4190116a 100644
--- a/src/plugins/qmldesigner/designercore/include/modelnode.h
+++ b/src/plugins/qmldesigner/designercore/include/modelnode.h
@@ -152,10 +152,10 @@ public:
     void destroy();
 
     QString id() const;
-    void ensureIdExists();
-    [[nodiscard]] QString validId();
-    void setIdWithRefactoring(const QString &id);
-    void setIdWithoutRefactoring(const QString &id);
+    void ensureIdExists() const;
+    [[nodiscard]] QString validId() const;
+    void setIdWithRefactoring(const QString &id) const;
+    void setIdWithoutRefactoring(const QString &id) const;
     static bool isValidId(const QString &id);
     static QString getIdValidityErrorMessage(const QString &id);
 
@@ -192,6 +192,7 @@ public:
     void removeAuxiliaryData(AuxiliaryDataType type, Utils::SmallStringView name) const;
     bool hasAuxiliaryData(AuxiliaryDataKeyView key) const;
     bool hasAuxiliaryData(AuxiliaryDataType type, Utils::SmallStringView name) const;
+    bool hasAuxiliaryData(AuxiliaryDataType type) const;
     AuxiliaryDatasForType auxiliaryData(AuxiliaryDataType type) const;
     AuxiliaryDatasView auxiliaryData() const;
 
diff --git a/src/plugins/qmldesigner/designercore/model/abstractview.cpp b/src/plugins/qmldesigner/designercore/model/abstractview.cpp
index 254f9536f9c..2f3ddb86c03 100644
--- a/src/plugins/qmldesigner/designercore/model/abstractview.cpp
+++ b/src/plugins/qmldesigner/designercore/model/abstractview.cpp
@@ -427,14 +427,7 @@ QList<Internal::InternalNode::Pointer> toInternalNodeList(const QList<ModelNode>
 */
 void AbstractView::setSelectedModelNodes(const QList<ModelNode> &selectedNodeList)
 {
-    QList<ModelNode> unlockedNodes;
-
-    for (const auto &modelNode : selectedNodeList) {
-        if (!ModelUtils::isThisOrAncestorLocked(modelNode))
-            unlockedNodes.push_back(modelNode);
-    }
-
-    model()->d->setSelectedNodes(toInternalNodeList(unlockedNodes));
+    model()->setSelectedModelNodes(selectedNodeList);
 }
 
 void AbstractView::setSelectedModelNode(const ModelNode &modelNode)
diff --git a/src/plugins/qmldesigner/designercore/model/auxiliarypropertystorageview.cpp b/src/plugins/qmldesigner/designercore/model/auxiliarypropertystorageview.cpp
new file mode 100644
index 00000000000..23d66b29a4b
--- /dev/null
+++ b/src/plugins/qmldesigner/designercore/model/auxiliarypropertystorageview.cpp
@@ -0,0 +1,201 @@
+// Copyright (C) 2024 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "auxiliarypropertystorageview.h"
+
+#include <sqlitedatabase.h>
+
+#include <QDataStream>
+#include <QIODevice>
+
+namespace QmlDesigner {
+
+namespace {
+struct Initializer
+{
+    Initializer(Sqlite::Database &database, bool isInitialized)
+    {
+        if (!isInitialized) {
+            createAuxiliaryPropertiesTable(database);
+        }
+        database.setIsInitialized(true);
+    }
+
+    void createAuxiliaryPropertiesTable(Sqlite::Database &database)
+    {
+        Sqlite::StrictTable table;
+        table.setUseIfNotExists(true);
+        table.setUseWithoutRowId(true);
+        table.setName("auxiliaryProperties");
+        auto &filePathColumn = table.addColumn("filePath", Sqlite::StrictColumnType::Text);
+        auto &idColumn = table.addColumn("id", Sqlite::StrictColumnType::Text);
+        auto &keyColumn = table.addColumn("key", Sqlite::StrictColumnType::Text);
+        table.addColumn("value", Sqlite::StrictColumnType::Blob);
+
+        table.addPrimaryKeyContraint({filePathColumn, idColumn, keyColumn});
+
+        table.initialize(database);
+    }
+};
+
+struct Entry
+{
+    Entry(Utils::SmallStringView nodeId, Utils::SmallStringView key, Sqlite::BlobView value)
+        : nodeId{nodeId}
+        , key{key}
+        , value{value}
+    {}
+
+    Utils::SmallStringView nodeId;
+    Utils::SmallStringView key;
+    Sqlite::BlobView value;
+};
+
+struct ChangeEntry
+{
+    ChangeEntry(Utils::SmallStringView id, Utils::SmallStringView name)
+        : id{id}
+        , name{name}
+    {}
+
+    friend bool operator<(const ChangeEntry &first, const ChangeEntry &second)
+    {
+        return std::tie(first.id, first.name) < std::tie(second.id, second.name);
+    }
+
+    Utils::SmallString id;
+    Utils::SmallString name;
+};
+
+} // namespace
+
+struct AuxiliaryPropertyStorageView::Data
+{
+    Data(Sqlite::Database &database)
+        : database{database}
+    {
+        exclusiveTransaction.commit();
+    }
+
+    Sqlite::Database &database;
+    Sqlite::ExclusiveNonThrowingDestructorTransaction<Sqlite::Database> exclusiveTransaction{database};
+    Initializer initializer{database, database.isInitialized()};
+    Sqlite::WriteStatement<4> upsertValue{
+        "INSERT INTO auxiliaryProperties(filePath, id, key, value) "
+        "VALUES(?1, ?2, ?3, ?4) "
+        "ON CONFLICT DO UPDATE SET value=excluded.value",
+        database};
+    Sqlite::ReadStatement<3, 1> selectValues{
+        "SELECT id, key, value FROM auxiliaryProperties WHERE filePath=?1", database};
+    Sqlite::WriteStatement<0> removeValues{"DELETE FROM auxiliaryProperties", database};
+    Sqlite::WriteStatement<3> removeValue{
+        "DELETE FROM auxiliaryProperties WHERE filePath=?1 AND id=?2 AND key=?3", database};
+    std::set<ChangeEntry, std::less<>> changeEntries;
+};
+
+AuxiliaryPropertyStorageView::AuxiliaryPropertyStorageView(
+    Sqlite::Database &database, ExternalDependenciesInterface &externalDependencies)
+    : AbstractView{externalDependencies}
+    , d{std::make_unique<Data>(database)}
+{}
+
+AuxiliaryPropertyStorageView::~AuxiliaryPropertyStorageView() = default;
+
+void AuxiliaryPropertyStorageView::modelAttached(Model *model)
+{
+    auto entryRange = d->selectValues.rangeWithTransaction<Entry>(
+        Utils::PathString{model->fileUrl().path()});
+
+    for (const auto entry : entryRange) {
+        auto node = model->modelNodeForId(QString{entry.nodeId});
+
+        if (!node)
+            continue;
+
+        auto array = QByteArray::fromRawData(entry.value.cdata(), entry.value.ssize());
+        QDataStream dataStream{array};
+
+        QVariant value;
+        dataStream >> value;
+
+        node.setAuxiliaryDataWithoutLock({AuxiliaryDataType::Persistent, entry.key}, value);
+    }
+
+    AbstractView::modelAttached(model);
+}
+
+void AuxiliaryPropertyStorageView::modelAboutToBeDetached(Model *model)
+{
+    Utils::PathString filePath{model->fileUrl().path()};
+
+    auto update = [&] {
+        for (const auto &[id, name] : d->changeEntries) {
+            QByteArray array;
+            QDataStream dataStream{&array, QIODevice::WriteOnly};
+            auto node = model->modelNodeForId(id.toQString());
+
+            auto value = node.auxiliaryData(AuxiliaryDataType::Persistent, name);
+            if (value) {
+                dataStream << *value;
+
+                Sqlite::BlobView blob{array};
+
+                d->upsertValue.write(filePath, id, name, blob);
+
+            } else {
+                d->removeValue.write(filePath, id, name);
+            }
+        }
+    };
+
+    if (d->changeEntries.size()) {
+        Sqlite::withImmediateTransaction(d->database, update);
+
+        d->changeEntries.clear();
+    }
+
+    AbstractView::modelAboutToBeDetached(model);
+}
+
+void AuxiliaryPropertyStorageView::nodeIdChanged(const ModelNode &node,
+                                                 const QString &newIdArg,
+                                                 const QString &oldIdArg)
+{
+    Utils::SmallString newId = newIdArg;
+    Utils::SmallString oldId = oldIdArg;
+    for (auto entry : node.auxiliaryData()) {
+        if (entry.first.type != AuxiliaryDataType::Persistent)
+            continue;
+
+        d->changeEntries.emplace(oldId, entry.first.name);
+        d->changeEntries.emplace(newId, entry.first.name);
+    }
+}
+
+void AuxiliaryPropertyStorageView::nodeAboutToBeRemoved(const ModelNode &removedNode)
+{
+    if (removedNode.hasId()) {
+        Utils::SmallString id = removedNode.id();
+        for (auto entry : removedNode.auxiliaryData()) {
+            if (entry.first.type != AuxiliaryDataType::Persistent)
+                continue;
+
+            d->changeEntries.emplace(id, entry.first.name);
+        }
+    }
+}
+
+void AuxiliaryPropertyStorageView::auxiliaryDataChanged(const ModelNode &node,
+                                                        AuxiliaryDataKeyView key,
+                                                        const QVariant &)
+{
+    if (isAttached() && key.type == AuxiliaryDataType::Persistent)
+        d->changeEntries.emplace(Utils::SmallString{node.id()}, key.name);
+}
+
+void AuxiliaryPropertyStorageView::resetForTestsOnly()
+{
+    Sqlite::withImmediateTransaction(d->database, [&] { d->removeValues.execute(); });
+}
+
+} // namespace QmlDesigner
diff --git a/src/plugins/qmldesigner/designercore/model/auxiliarypropertystorageview.h b/src/plugins/qmldesigner/designercore/model/auxiliarypropertystorageview.h
new file mode 100644
index 00000000000..2096afe9596
--- /dev/null
+++ b/src/plugins/qmldesigner/designercore/model/auxiliarypropertystorageview.h
@@ -0,0 +1,34 @@
+// Copyright (C) 2024 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include <abstractview.h>
+
+#include <memory.h>
+
+namespace QmlDesigner {
+class AuxiliaryPropertyStorageView final : public AbstractView
+{
+public:
+    AuxiliaryPropertyStorageView(Sqlite::Database &database,
+                                 ExternalDependenciesInterface &externalDependencies);
+    ~AuxiliaryPropertyStorageView();
+
+    void modelAttached(Model *model) override;
+    void modelAboutToBeDetached(Model *model) override;
+
+    void nodeIdChanged(const ModelNode &node, const QString &newId, const QString &oldId) override;
+
+    void nodeAboutToBeRemoved(const ModelNode &removedNode) override;
+
+    void auxiliaryDataChanged(const ModelNode &node,
+                              AuxiliaryDataKeyView type,
+                              const QVariant &data) override;
+
+    struct Data;
+
+    void resetForTestsOnly();
+
+private:
+    std::unique_ptr<Data> d;
+};
+} // namespace QmlDesigner
diff --git a/src/plugins/qmldesigner/designercore/model/internalnode.cpp b/src/plugins/qmldesigner/designercore/model/internalnode.cpp
index bf59383747c..d4a7c1ba584 100644
--- a/src/plugins/qmldesigner/designercore/model/internalnode.cpp
+++ b/src/plugins/qmldesigner/designercore/model/internalnode.cpp
@@ -51,6 +51,14 @@ auto find(Type &&auxiliaryDatas, AuxiliaryDataKeyView key)
     });
 }
 
+template<typename Type>
+auto find(Type &&auxiliaryDatas, AuxiliaryDataType type)
+{
+    return std::find_if(auxiliaryDatas.begin(), auxiliaryDatas.end(), [&](const auto &element) {
+        return element.first.type == type;
+    });
+}
+
 } // namespace
 
 std::optional<QVariant> InternalNode::auxiliaryData(AuxiliaryDataKeyView key) const
@@ -99,6 +107,13 @@ bool InternalNode::hasAuxiliaryData(AuxiliaryDataKeyView key) const
     return found != m_auxiliaryDatas.end();
 }
 
+bool InternalNode::hasAuxiliaryData(AuxiliaryDataType type) const
+{
+    auto found = find(m_auxiliaryDatas, type);
+
+    return found != m_auxiliaryDatas.end();
+}
+
 AuxiliaryDatasForType InternalNode::auxiliaryData(AuxiliaryDataType type) const
 {
     AuxiliaryDatasForType data;
diff --git a/src/plugins/qmldesigner/designercore/model/internalnode_p.h b/src/plugins/qmldesigner/designercore/model/internalnode_p.h
index f3fe55f2315..0bc0b9ce997 100644
--- a/src/plugins/qmldesigner/designercore/model/internalnode_p.h
+++ b/src/plugins/qmldesigner/designercore/model/internalnode_p.h
@@ -76,6 +76,7 @@ public:
     bool setAuxiliaryData(AuxiliaryDataKeyView key, const QVariant &data);
     bool removeAuxiliaryData(AuxiliaryDataKeyView key);
     bool hasAuxiliaryData(AuxiliaryDataKeyView key) const;
+    bool hasAuxiliaryData(AuxiliaryDataType type) const;
     AuxiliaryDatasForType auxiliaryData(AuxiliaryDataType type) const;
     AuxiliaryDatasView auxiliaryData() const { return std::as_const(m_auxiliaryDatas); }
 
diff --git a/src/plugins/qmldesigner/designercore/model/model.cpp b/src/plugins/qmldesigner/designercore/model/model.cpp
index f92aca3b8d6..0fddce99b09 100644
--- a/src/plugins/qmldesigner/designercore/model/model.cpp
+++ b/src/plugins/qmldesigner/designercore/model/model.cpp
@@ -4,6 +4,7 @@
 #include "model.h"
 #include "internalnode_p.h"
 #include "model_p.h"
+#include "modelutils.h"
 #include <modelnode.h>
 
 #include "../projectstorage/sourcepath.h"
@@ -2039,6 +2040,18 @@ QList<ModelNode> Model::selectedNodes(AbstractView *view) const
     return d->toModelNodeList(d->selectedNodes(), view);
 }
 
+void Model::setSelectedModelNodes(const QList<ModelNode> &selectedNodeList)
+{
+    QList<ModelNode> unlockedNodes;
+
+    for (const auto &modelNode : selectedNodeList) {
+        if (!ModelUtils::isThisOrAncestorLocked(modelNode))
+            unlockedNodes.push_back(modelNode);
+    }
+
+    d->setSelectedNodes(toInternalNodeList(unlockedNodes));
+}
+
 void Model::clearMetaInfoCache()
 {
     d->m_nodeMetaInfoCache.clear();
@@ -2064,7 +2077,6 @@ SourceId Model::fileUrlSourceId() const
   */
 void Model::setFileUrl(const QUrl &url)
 {
-    QTC_ASSERT(url.isValid() && url.isLocalFile(), qDebug() << "url:" << url; return);
     Internal::WriteLocker locker(d.get());
     d->setFileUrl(url);
 }
diff --git a/src/plugins/qmldesigner/designercore/model/modelnode.cpp b/src/plugins/qmldesigner/designercore/model/modelnode.cpp
index 5e7defd1456..c4fc203fd2b 100644
--- a/src/plugins/qmldesigner/designercore/model/modelnode.cpp
+++ b/src/plugins/qmldesigner/designercore/model/modelnode.cpp
@@ -80,13 +80,13 @@ QString ModelNode::id() const
     return m_internalNode->id;
 }
 
-void ModelNode::ensureIdExists()
+void ModelNode::ensureIdExists() const
 {
     if (!hasId())
         setIdWithoutRefactoring(model()->generateNewId(simplifiedTypeName()));
 }
 
-QString ModelNode::validId()
+QString ModelNode::validId() const
 {
     ensureIdExists();
 
@@ -162,7 +162,7 @@ bool ModelNode::hasId() const
     return !m_internalNode->id.isEmpty();
 }
 
-void ModelNode::setIdWithRefactoring(const QString &id)
+void ModelNode::setIdWithRefactoring(const QString &id) const
 {
     if (isValid()) {
         if (model()->rewriterView() && !id.isEmpty()
@@ -174,7 +174,7 @@ void ModelNode::setIdWithRefactoring(const QString &id)
     }
 }
 
-void ModelNode::setIdWithoutRefactoring(const QString &id)
+void ModelNode::setIdWithoutRefactoring(const QString &id) const
 {
     Internal::WriteLocker locker(m_model.data());
     if (!isValid())
@@ -601,7 +601,8 @@ static QList<ModelNode> descendantNodes(const ModelNode &node)
 static void removeModelNodeFromSelection(const ModelNode &node)
 {
     // remove nodes from the active selection
-    QList<ModelNode> selectedList = node.view()->selectedModelNodes();
+    auto model = node.model();
+    QList<ModelNode> selectedList = model->selectedNodes(node.view());
 
     const QList<ModelNode> descendants = descendantNodes(node);
     for (const ModelNode &descendantNode : descendants)
@@ -609,7 +610,7 @@ static void removeModelNodeFromSelection(const ModelNode &node)
 
     selectedList.removeAll(node);
 
-    node.view()->setSelectedModelNodes(selectedList);
+    model->setSelectedModelNodes(selectedList);
 }
 
 /*! \brief complete removes this ModelNode from the Model
@@ -995,6 +996,8 @@ void ModelNode::setAuxiliaryData(AuxiliaryDataType type,
 void ModelNode::setAuxiliaryData(AuxiliaryDataKeyView key, const QVariant &data) const
 {
     if (isValid()) {
+        if (key.type == AuxiliaryDataType::Persistent)
+            ensureIdExists();
         Internal::WriteLocker locker(m_model.data());
         m_model->d->setAuxiliaryData(internalNode(), key, data);
     }
@@ -1002,21 +1005,32 @@ void ModelNode::setAuxiliaryData(AuxiliaryDataKeyView key, const QVariant &data)
 
 void ModelNode::setAuxiliaryDataWithoutLock(AuxiliaryDataKeyView key, const QVariant &data) const
 {
-    if (isValid())
+    if (isValid()) {
+        if (key.type == AuxiliaryDataType::Persistent)
+            ensureIdExists();
+
         m_model->d->setAuxiliaryData(internalNode(), key, data);
+    }
 }
 
 void ModelNode::setAuxiliaryDataWithoutLock(AuxiliaryDataType type,
                                             Utils::SmallStringView name,
                                             const QVariant &data) const
 {
-    if (isValid())
+    if (isValid()) {
+        if (type == AuxiliaryDataType::Persistent)
+            ensureIdExists();
+
         m_model->d->setAuxiliaryData(internalNode(), {type, name}, data);
+    }
 }
 
 void ModelNode::removeAuxiliaryData(AuxiliaryDataKeyView key) const
 {
     if (isValid()) {
+        if (key.type == AuxiliaryDataType::Persistent)
+            ensureIdExists();
+
         Internal::WriteLocker locker(m_model.data());
         m_model->d->removeAuxiliaryData(internalNode(), key);
     }
@@ -1040,6 +1054,14 @@ bool ModelNode::hasAuxiliaryData(AuxiliaryDataType type, Utils::SmallStringView
     return hasAuxiliaryData({type, name});
 }
 
+bool ModelNode::hasAuxiliaryData(AuxiliaryDataType type) const
+{
+    if (!isValid())
+        return false;
+
+    return m_internalNode->hasAuxiliaryData(type);
+}
+
 AuxiliaryDatasForType ModelNode::auxiliaryData(AuxiliaryDataType type) const
 {
     if (!isValid())
diff --git a/tests/unit/tests/printers/gtest-creator-printing.cpp b/tests/unit/tests/printers/gtest-creator-printing.cpp
index 4f3c44419ab..d1ad492e00d 100644
--- a/tests/unit/tests/printers/gtest-creator-printing.cpp
+++ b/tests/unit/tests/printers/gtest-creator-printing.cpp
@@ -534,6 +534,42 @@ std::ostream &operator<<(std::ostream &out, FlagIs flagIs)
     return out;
 }
 
+std::ostream &operator<<(std::ostream &out, const BasicAuxiliaryDataKey<Utils::SmallStringView> &key)
+{
+    return out << "(" << key.name << ", " << key.type << ")";
+}
+
+std::ostream &operator<<(std::ostream &out, const BasicAuxiliaryDataKey<Utils::SmallString> &key)
+{
+    return out << "(" << key.name << ", " << key.type << ")";
+}
+
+std::ostream &operator<<(std::ostream &out, AuxiliaryDataType type)
+{
+    switch (type) {
+    case AuxiliaryDataType::None:
+        out << "None";
+        break;
+    case AuxiliaryDataType::Temporary:
+        out << "Temporary";
+        break;
+    case AuxiliaryDataType::Document:
+        out << "Document";
+        break;
+    case AuxiliaryDataType::NodeInstancePropertyOverwrite:
+        out << "NodeInstancePropertyOverwrite";
+        break;
+    case AuxiliaryDataType::NodeInstanceAuxiliary:
+        out << "NodeInstanceAuxiliary";
+        break;
+    case AuxiliaryDataType::Persistent:
+        out << "Persistent";
+        break;
+    }
+
+    return out;
+}
+
 namespace Cache {
 
 std::ostream &operator<<(std::ostream &out, const SourceContext &sourceContext)
diff --git a/tests/unit/tests/printers/gtest-creator-printing.h b/tests/unit/tests/printers/gtest-creator-printing.h
index 3fb862d915f..7d5bfe6606a 100644
--- a/tests/unit/tests/printers/gtest-creator-printing.h
+++ b/tests/unit/tests/printers/gtest-creator-printing.h
@@ -4,6 +4,7 @@
 #pragma once
 
 #include <designercore/model/modelresourcemanagementfwd.h>
+#include <qmlpuppetcommunication/interfaces/nodeinstanceglobal.h>
 #include <utils/cpplanguage_details.h>
 #include <utils/smallstringio.h>
 
@@ -126,6 +127,8 @@ class NodeMetaInfo;
 class PropertyMetaInfo;
 struct CompoundPropertyMetaInfo;
 enum class FlagIs : unsigned int;
+template<typename NameType>
+class BasicAuxiliaryDataKey;
 
 std::ostream &operator<<(std::ostream &out, const ModelNode &node);
 std::ostream &operator<<(std::ostream &out, const VariantProperty &property);
@@ -142,6 +145,9 @@ std::ostream &operator<<(std::ostream &out, const NodeMetaInfo &metaInfo);
 std::ostream &operator<<(std::ostream &out, const PropertyMetaInfo &metaInfo);
 std::ostream &operator<<(std::ostream &out, const CompoundPropertyMetaInfo &metaInfo);
 std::ostream &operator<<(std::ostream &out, FlagIs flagIs);
+std::ostream &operator<<(std::ostream &out, const BasicAuxiliaryDataKey<Utils::SmallStringView> &key);
+std::ostream &operator<<(std::ostream &out, const BasicAuxiliaryDataKey<Utils::SmallString> &key);
+std::ostream &operator<<(std::ostream &out, AuxiliaryDataType type);
 
 namespace Cache {
 class SourceContext;
diff --git a/tests/unit/tests/printers/gtest-std-printing.h b/tests/unit/tests/printers/gtest-std-printing.h
index af62ddfb1ee..f2ad83ef619 100644
--- a/tests/unit/tests/printers/gtest-std-printing.h
+++ b/tests/unit/tests/printers/gtest-std-printing.h
@@ -4,6 +4,8 @@
 #pragma once
 
 #include <ostream>
+#include <span>
+#include <utility>
 #include <vector>
 
 namespace std {
@@ -24,4 +26,41 @@ ostream &operator<<(ostream &out, const vector<T> &vector)
     return out;
 }
 
+template<typename T, size_t Extent>
+ostream &operator<<(ostream &out, const span<T, Extent> &span)
+{
+    out << "[";
+
+    for (auto current = span.begin(); current != span.end(); ++current) {
+        out << *current;
+
+        if (std::next(current) != span.end())
+            out << ", ";
+    }
+
+    out << "]";
+
+    return out;
+}
+
+template<typename First, typename Second>
+ostream &operator<<(ostream &out, const pair<First, Second> &pair)
+{
+    out << "{";
+
+    out << pair.first;
+
+    out << ", ";
+
+    out << pair.second;
+
+    out << "}";
+
+    return out;
+}
+
+inline ostream &operator<<(ostream &out, std::byte byte)
+{
+    return out << std::hex << static_cast<int>(byte) << std::dec;
+}
 } // namespace std
diff --git a/tests/unit/tests/testdesignercore/CMakeLists.txt b/tests/unit/tests/testdesignercore/CMakeLists.txt
index c446af81a35..423ce7ff8a5 100644
--- a/tests/unit/tests/testdesignercore/CMakeLists.txt
+++ b/tests/unit/tests/testdesignercore/CMakeLists.txt
@@ -80,6 +80,7 @@ add_qtc_library(TestDesignerCore OBJECT
     metainfo/nodemetainfo.cpp
     model/abstractproperty.cpp
     model/abstractview.cpp
+    model/auxiliarypropertystorageview.cpp model/auxiliarypropertystorageview.h
     model/annotation.cpp
     model/bindingproperty.cpp
     model/import.cpp
diff --git a/tests/unit/tests/unittests/model/CMakeLists.txt b/tests/unit/tests/unittests/model/CMakeLists.txt
index 43d6154c504..08b2a7daa59 100644
--- a/tests/unit/tests/unittests/model/CMakeLists.txt
+++ b/tests/unit/tests/unittests/model/CMakeLists.txt
@@ -1,6 +1,7 @@
 # qmldesigner/designercore/model
 extend_qtc_test(unittest
   SOURCES
+    auxiliarypropertystorageview-test.cpp
     import-test.cpp
     model-test.cpp
     modelnode-test.cpp
diff --git a/tests/unit/tests/unittests/model/auxiliarypropertystorageview-test.cpp b/tests/unit/tests/unittests/model/auxiliarypropertystorageview-test.cpp
new file mode 100644
index 00000000000..62f99e89d57
--- /dev/null
+++ b/tests/unit/tests/unittests/model/auxiliarypropertystorageview-test.cpp
@@ -0,0 +1,230 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include <googletest.h>
+
+#include <mocks/externaldependenciesmock.h>
+#include <mocks/modelresourcemanagementmock.h>
+#include <mocks/projectstoragemock.h>
+#include <mocks/sourcepathcachemock.h>
+
+#include <model/auxiliarypropertystorageview.h>
+
+namespace {
+
+using QmlDesigner::AuxiliaryDataKey;
+using QmlDesigner::AuxiliaryDataType;
+using QmlDesigner::ModelNode;
+
+template<typename NameMatcher>
+auto AuxiliaryProperty(AuxiliaryDataType type, const NameMatcher &nameMatcher, const QVariant &value)
+{
+    return Pair(AllOf(Field(&AuxiliaryDataKey::type, type),
+                      Field(&AuxiliaryDataKey::name, nameMatcher)),
+                value);
+}
+
+class AuxiliaryPropertyStorageView : public ::testing::Test
+{
+protected:
+    struct StaticData
+    {
+        Sqlite::Database database{":memory:", Sqlite::JournalMode::Memory};
+    };
+
+    ~AuxiliaryPropertyStorageView() { view.resetForTestsOnly(); }
+
+    static void SetUpTestSuite() { staticData = std::make_unique<StaticData>(); }
+
+    static void TearDownTestSuite() { staticData.reset(); }
+
+    inline static std::unique_ptr<StaticData> staticData;
+    Sqlite::Database &database = staticData->database;
+    NiceMock<SourcePathCacheMockWithPaths> pathCacheMock{"/path/foo.qml"};
+    NiceMock<ProjectStorageMockWithQtQtuick> projectStorageMock{pathCacheMock.sourceId};
+    NiceMock<ModelResourceManagementMock> resourceManagementMock;
+    QmlDesigner::Imports imports = {QmlDesigner::Import::createLibraryImport("QtQuick")};
+    QmlDesigner::Model model{{projectStorageMock, pathCacheMock},
+                             "Item",
+                             imports,
+                             pathCacheMock.path.toQString(),
+                             std::make_unique<ModelResourceManagementMockWrapper>(
+                                 resourceManagementMock)};
+    QmlDesigner::Model model2{{projectStorageMock, pathCacheMock},
+                              "Item",
+                              imports,
+                              pathCacheMock.path.toQString(),
+                              std::make_unique<ModelResourceManagementMockWrapper>(
+                                  resourceManagementMock)};
+    NiceMock<ExternalDependenciesMock> externalDependenciesMock;
+    QmlDesigner::AuxiliaryPropertyStorageView view{database, externalDependenciesMock};
+    ModelNode rootNode = model.rootModelNode();
+    ModelNode rootNode2 = model2.rootModelNode();
+    QmlDesigner::AuxiliaryDataKeyView persistentFooKey{AuxiliaryDataType::Persistent, "foo"};
+    QmlDesigner::AuxiliaryDataKeyView temporaryFooKey{AuxiliaryDataType::Temporary, "foo"};
+};
+
+TEST_F(AuxiliaryPropertyStorageView, store_persistent_auxiliary_property)
+{
+    // arrange
+    model.attachView(&view);
+    rootNode.setIdWithoutRefactoring("root");
+    rootNode2.setIdWithoutRefactoring("root");
+
+    // act
+    rootNode.setAuxiliaryData(persistentFooKey, "text");
+
+    // assert
+    model.detachView(&view);
+    model2.attachView(&view);
+    ASSERT_THAT(rootNode2.auxiliaryData(),
+                Contains(AuxiliaryProperty(AuxiliaryDataType::Persistent, "foo", "text")));
+}
+
+TEST_F(AuxiliaryPropertyStorageView, store_color_auxiliary_property)
+{
+    // arrange
+    model.attachView(&view);
+    rootNode.setIdWithoutRefactoring("root");
+    rootNode2.setIdWithoutRefactoring("root");
+    QColor color{Qt::red};
+
+    // act
+    rootNode.setAuxiliaryData(persistentFooKey, color);
+
+    // assert
+    model.detachView(&view);
+    model2.attachView(&view);
+    ASSERT_THAT(rootNode2.auxiliaryData(),
+                Contains(AuxiliaryProperty(AuxiliaryDataType::Persistent, "foo", color)));
+}
+
+TEST_F(AuxiliaryPropertyStorageView, do_not_store_temporary_auxiliary_property)
+{
+    // arrange
+    model.attachView(&view);
+    rootNode.setIdWithoutRefactoring("root");
+    rootNode2.setIdWithoutRefactoring("root");
+
+    // act
+    rootNode.setAuxiliaryData(temporaryFooKey, "text");
+
+    // assert
+    model.detachView(&view);
+    model2.attachView(&view);
+    ASSERT_THAT(rootNode2.auxiliaryData(),
+                Not(Contains(AuxiliaryProperty(AuxiliaryDataType::Temporary, "foo", "text"))));
+}
+
+TEST_F(AuxiliaryPropertyStorageView, do_not_load_node_without_id)
+{
+    // arrange
+    model.attachView(&view);
+    rootNode.setIdWithoutRefactoring("root");
+
+    // act
+    rootNode.setAuxiliaryData(persistentFooKey, "text");
+
+    // assert
+    model.detachView(&view);
+    model2.attachView(&view);
+    ASSERT_THAT(rootNode2.auxiliaryData(),
+                Not(Contains(AuxiliaryProperty(AuxiliaryDataType::Persistent, "foo", "text"))));
+}
+
+TEST_F(AuxiliaryPropertyStorageView, do_not_store_node_without_id)
+{
+    // arrange
+    model.attachView(&view);
+    rootNode2.setIdWithoutRefactoring("root");
+
+    // act
+    rootNode.setAuxiliaryData(persistentFooKey, "text");
+
+    // assert
+    model.detachView(&view);
+    model2.attachView(&view);
+    ASSERT_THAT(rootNode2.auxiliaryData(),
+                Not(Contains(AuxiliaryProperty(AuxiliaryDataType::Persistent, "foo", "text"))));
+}
+
+TEST_F(AuxiliaryPropertyStorageView, do_not_load_from_different_document)
+{
+    // arrange
+    model2.setFileUrl(QUrl{"/path/foo2.qml"});
+    model.attachView(&view);
+    rootNode.setIdWithoutRefactoring("root");
+    rootNode2.setIdWithoutRefactoring("root");
+
+    // act
+    rootNode.setAuxiliaryData(persistentFooKey, "text");
+
+    // assert
+    model.detachView(&view);
+    model2.attachView(&view);
+    ASSERT_THAT(rootNode2.auxiliaryData(),
+                Not(Contains(AuxiliaryProperty(AuxiliaryDataType::Persistent, "foo", "text"))));
+}
+
+TEST_F(AuxiliaryPropertyStorageView, removing_node_erases_entries)
+{
+    // arrange
+    auto node = model.createModelNode("Item");
+    node.setIdWithoutRefactoring("node1");
+    node.setAuxiliaryData(persistentFooKey, "some value");
+    auto node2 = model2.createModelNode("Item");
+    node2.setIdWithoutRefactoring("node1");
+    model.attachView(&view);
+    rootNode.setIdWithoutRefactoring("root");
+    rootNode2.setIdWithoutRefactoring("root");
+
+    // act
+    node.destroy();
+
+    // assert
+    model.detachView(&view);
+    model2.attachView(&view);
+    ASSERT_THAT(node2.auxiliaryData(),
+                Not(Contains(AuxiliaryProperty(AuxiliaryDataType::Persistent, "foo", "some value"))));
+}
+
+TEST_F(AuxiliaryPropertyStorageView, changing_node_id_is_saving_data_under_new_id)
+{
+    // arrange
+    model.attachView(&view);
+    rootNode.setIdWithoutRefactoring("root");
+    rootNode2.setIdWithoutRefactoring("root2");
+    rootNode.setAuxiliaryData(persistentFooKey, "text");
+    model.detachView(&view);
+    model.attachView(&view);
+
+    // act
+    rootNode.setIdWithoutRefactoring("root2");
+
+    // assert
+    model.detachView(&view);
+    model2.attachView(&view);
+    ASSERT_THAT(rootNode2.auxiliaryData(),
+                Contains(AuxiliaryProperty(AuxiliaryDataType::Persistent, "foo", "text")));
+}
+
+TEST_F(AuxiliaryPropertyStorageView, changing_node_id_is_removing_data_from_old_id)
+{
+    // arrange
+    model.attachView(&view);
+    rootNode.setIdWithoutRefactoring("root");
+    rootNode2.setIdWithoutRefactoring("root");
+    rootNode.setAuxiliaryData(persistentFooKey, "text");
+    model.detachView(&view);
+    model.attachView(&view);
+
+    // act
+    rootNode.setIdWithoutRefactoring("root2");
+
+    // assert
+    model.detachView(&view);
+    model2.attachView(&view);
+    ASSERT_THAT(rootNode2.auxiliaryData(),
+                Not(Contains(AuxiliaryProperty(AuxiliaryDataType::Persistent, "foo", "text"))));
+}
+} // namespace
diff --git a/tests/unit/tests/utils/googletest.h b/tests/unit/tests/utils/googletest.h
index 7da860f7ffa..2692eecece3 100644
--- a/tests/unit/tests/utils/googletest.h
+++ b/tests/unit/tests/utils/googletest.h
@@ -9,10 +9,12 @@
 
 #include "conditionally-disabled-tests.h"
 
-#include "../printers/gtest-creator-printing.h"
-#include "../printers/gtest-qt-printing.h"
 #include "../printers/gtest-std-printing.h"
 
+#include "../printers/gtest-qt-printing.h"
+
+#include "../printers/gtest-creator-printing.h"
+
 #include "../utils/google-using-declarations.h"
 
 #include "../matchers/unittest-matchers.h"