diff --git a/app/MindWork AI Studio/Settings/DataModel/DataSourceERI_V1.cs b/app/MindWork AI Studio/Settings/DataModel/DataSourceERI_V1.cs
index f06fbc7c..eb38167d 100644
--- a/app/MindWork AI Studio/Settings/DataModel/DataSourceERI_V1.cs	
+++ b/app/MindWork AI Studio/Settings/DataModel/DataSourceERI_V1.cs	
@@ -6,7 +6,7 @@ namespace AIStudio.Settings.DataModel;
 /// <summary>
 /// An external data source, accessed via an ERI server, cf. https://github.com/MindWorkAI/ERI.
 /// </summary>
-public readonly record struct DataSourceERI_V1 : IDataSource
+public readonly record struct DataSourceERI_V1 : IExternalDataSource
 {
     public DataSourceERI_V1()
     {
diff --git a/app/MindWork AI Studio/Settings/DataModel/DataSourceLocalDirectory.cs b/app/MindWork AI Studio/Settings/DataModel/DataSourceLocalDirectory.cs
index 0f9b2fde..963b9ba1 100644
--- a/app/MindWork AI Studio/Settings/DataModel/DataSourceLocalDirectory.cs	
+++ b/app/MindWork AI Studio/Settings/DataModel/DataSourceLocalDirectory.cs	
@@ -3,7 +3,7 @@ namespace AIStudio.Settings.DataModel;
 /// <summary>
 /// Represents a local directory as a data source.
 /// </summary>
-public readonly record struct DataSourceLocalDirectory : IDataSource
+public readonly record struct DataSourceLocalDirectory : IInternalDataSource
 {
     public DataSourceLocalDirectory()
     {
@@ -21,6 +21,9 @@ public readonly record struct DataSourceLocalDirectory : IDataSource
     /// <inheritdoc />
     public DataSourceType Type { get; init; } = DataSourceType.NONE;
     
+    /// <inheritdoc />
+    public string EmbeddingId { get; init; } = Guid.Empty.ToString();
+    
     /// <summary>
     /// The path to the directory.
     /// </summary>
diff --git a/app/MindWork AI Studio/Settings/DataModel/DataSourceLocalFile.cs b/app/MindWork AI Studio/Settings/DataModel/DataSourceLocalFile.cs
index 7c70c76b..a6088190 100644
--- a/app/MindWork AI Studio/Settings/DataModel/DataSourceLocalFile.cs	
+++ b/app/MindWork AI Studio/Settings/DataModel/DataSourceLocalFile.cs	
@@ -3,7 +3,7 @@ namespace AIStudio.Settings.DataModel;
 /// <summary>
 /// Represents one local file as a data source.
 /// </summary>
-public readonly record struct DataSourceLocalFile : IDataSource
+public readonly record struct DataSourceLocalFile : IInternalDataSource
 {
     public DataSourceLocalFile()
     {
@@ -21,6 +21,9 @@ public readonly record struct DataSourceLocalFile : IDataSource
     /// <inheritdoc />
     public DataSourceType Type { get; init; } = DataSourceType.NONE;
     
+    /// <inheritdoc />
+    public string EmbeddingId { get; init; } = Guid.Empty.ToString();
+    
     /// <summary>
     /// The path to the file.
     /// </summary>
diff --git a/app/MindWork AI Studio/Settings/IExternalDataSource.cs b/app/MindWork AI Studio/Settings/IExternalDataSource.cs
new file mode 100644
index 00000000..ffe08bad
--- /dev/null
+++ b/app/MindWork AI Studio/Settings/IExternalDataSource.cs	
@@ -0,0 +1,3 @@
+namespace AIStudio.Settings;
+
+public interface IExternalDataSource : IDataSource;
\ No newline at end of file
diff --git a/app/MindWork AI Studio/Settings/IInternalDataSource.cs b/app/MindWork AI Studio/Settings/IInternalDataSource.cs
new file mode 100644
index 00000000..0ffa7dea
--- /dev/null
+++ b/app/MindWork AI Studio/Settings/IInternalDataSource.cs	
@@ -0,0 +1,9 @@
+namespace AIStudio.Settings;
+
+public interface IInternalDataSource : IDataSource
+{
+    /// <summary>
+    /// The unique identifier of the embedding method used by this internal data source.
+    /// </summary>
+    public string EmbeddingId { get; init; }
+}
\ No newline at end of file