diff --git a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/DigitalTwins/BuildingTwin.json b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/DigitalTwins/BuildingTwin.json
index ba5291c2b571..085f3ca3d530 100644
--- a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/DigitalTwins/BuildingTwin.json
+++ b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/DigitalTwins/BuildingTwin.json
@@ -1,6 +1,6 @@
 {
     "$metadata": {
-        "$model": "dtmi:samples:Building;1"
+        "$model": "dtmi:com:samples:Building;1"
     },
     "AverageTemperature": 68,
     "TemperatureUnit": "Celsius"
diff --git a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/DigitalTwins/FloorTwin.json b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/DigitalTwins/FloorTwin.json
index f9a08edfd8bb..acbe3c91c0aa 100644
--- a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/DigitalTwins/FloorTwin.json
+++ b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/DigitalTwins/FloorTwin.json
@@ -1,6 +1,6 @@
 {
     "$metadata": {
-        "$model": "dtmi:samples:Floor;1"
+        "$model": "dtmi:com:samples:Floor;1"
     },
     "AverageTemperature": 75
 }
diff --git a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/DigitalTwins/HVACTwin.json b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/DigitalTwins/HVACTwin.json
index 49b4ad617232..75c0ba9a8e9f 100644
--- a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/DigitalTwins/HVACTwin.json
+++ b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/DigitalTwins/HVACTwin.json
@@ -1,6 +1,6 @@
 {
     "$metadata": {
-        "$model": "dtmi:samples:HVAC;1"
+        "$model": "dtmi:com:samples:HVAC;1"
     },
     "Efficiency": 94,
     "TargetTemperature": 72,
diff --git a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/DigitalTwins/RoomTwin.json b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/DigitalTwins/RoomTwin.json
index bc75da2917f4..e9ad94f496e9 100644
--- a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/DigitalTwins/RoomTwin.json
+++ b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/DigitalTwins/RoomTwin.json
@@ -1,6 +1,6 @@
 {
     "$metadata": {
-        "$model": "dtmi:samples:Room;1"
+        "$model": "dtmi:com:samples:Room;1"
     },
     "Temperature": 80,
     "Humidity": 25,
diff --git a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/Building.json b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/Building.json
index 1a032d636473..b9c7e4f674a5 100644
--- a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/Building.json
+++ b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/Building.json
@@ -1,5 +1,5 @@
 {
-    "@id": "dtmi:samples:Building;1",
+    "@id": "dtmi:com:samples:Building;1",
     "@type": "Interface",
     "@context": "dtmi:dtdl:context;2",
     "displayName": "Building",
@@ -7,7 +7,7 @@
         {
             "@type": "Relationship",
             "name": "has",
-            "target": "dtmi:samples:Floor;1",
+            "target": "dtmi:com:samples:Floor;1",
             "properties": [
                 {
                     "@type": "Property",
@@ -19,7 +19,7 @@
         {
             "@type": "Relationship",
             "name": "isEquippedWith",
-            "target": "dtmi:samples:HVAC;1"
+            "target": "dtmi:com:samples:HVAC;1"
         },
         {
             "@type": "Property",
diff --git a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/Floor.json b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/Floor.json
index fe4ea891228b..b7765e08bf0f 100644
--- a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/Floor.json
+++ b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/Floor.json
@@ -1,5 +1,5 @@
 {
-    "@id": "dtmi:samples:Floor;1",
+    "@id": "dtmi:com:samples:Floor;1",
     "@type": "Interface",
     "@context": "dtmi:dtdl:context;2",
     "displayName": "Floor",
@@ -7,7 +7,7 @@
         {
             "@type": "Relationship",
             "name": "contains",
-            "target": "dtmi:samples:Room;1"
+            "target": "dtmi:com:samples:Room;1"
         },
         {
             "@type": "Property",
diff --git a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/HVAC.json b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/HVAC.json
index 35186f130a95..821c5aa20422 100644
--- a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/HVAC.json
+++ b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/HVAC.json
@@ -1,5 +1,5 @@
 {
-    "@id": "dtmi:samples:HVAC;1",
+    "@id": "dtmi:com:samples:HVAC;1",
     "@type": "Interface",
     "@context": "dtmi:dtdl:context;2",
     "displayName": "HVAC",
@@ -22,7 +22,7 @@
         {
             "@type": "Relationship",
             "name": "controlsTemperature",
-            "target": "dtmi:samples:Floor;1"
+            "target": "dtmi:com:samples:Floor;1"
         }
     ]
 }
diff --git a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/Room.json b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/Room.json
index a6c2dfe6bd78..9389f44a61af 100644
--- a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/Room.json
+++ b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/Room.json
@@ -1,5 +1,5 @@
 {
-    "@id": "dtmi:samples:Room;1",
+    "@id": "dtmi:com:samples:Room;1",
     "@type": "Interface",
     "@context": "dtmi:dtdl:context;2",
     "displayName": "Room",
@@ -27,7 +27,7 @@
         {
             "@type": "Component",
             "name": "wifiAccessPoint",
-            "schema": "dtmi:samples:Wifi;1"
+            "schema": "dtmi:com:samples:Wifi;1"
         }
     ]
 }
diff --git a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/Wifi.json b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/Wifi.json
index a2b07b484334..62337d212cb5 100644
--- a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/Wifi.json
+++ b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/DTDL/Models/Wifi.json
@@ -1,5 +1,5 @@
 {
-    "@id": "dtmi:samples:Wifi;1",
+    "@id": "dtmi:com:samples:Wifi;1",
     "@type": "Interface",
     "@context": "dtmi:dtdl:context;2",
     "displayName": "Wifi",
diff --git a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/ModelLifecycleSamples.cs b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/ModelLifecycleSamples.cs
index bb46b09d8e6d..95ff783a461b 100644
--- a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/ModelLifecycleSamples.cs
+++ b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/ModelLifecycleSamples.cs
@@ -101,5 +101,25 @@ public async Task RunSamplesAsync(DigitalTwinsClient client)
 
             #endregion Snippet:DigitalTwinsSampleDeleteModel
         }
+
+        /// <summary>
+        /// Try to delete a model, but don't fail if the model does not exist. Useful in setting up or tearing down after running a sample if the
+        /// sample re-uses the same model Id each time
+        /// </summary>
+        /// <param name="client">The client to use when deleting the model</param>
+        /// <param name="modelId">The id of the model to delete</param>
+        /// <returns>An empty task once the model has been deleted.</returns>
+        public static async Task TryDeleteModelAsync(DigitalTwinsClient client, string modelId)
+        {
+            try
+            {
+                Console.WriteLine($"Deleting model Id '{modelId}' if it exists.");
+                await client.DeleteModelAsync(modelId);
+            }
+            catch (RequestFailedException ex) when (ex.Status == 404)
+            {
+                // Model did not exist yet, and that's fine
+            }
+        }
     }
 }
diff --git a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/RelationshipSamples.cs b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/RelationshipSamples.cs
index 416f0c69646d..910794aaf70b 100644
--- a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/RelationshipSamples.cs
+++ b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/RelationshipSamples.cs
@@ -6,6 +6,7 @@
 using System.Text.Json;
 using System.Threading.Tasks;
 using Azure.DigitalTwins.Core.Serialization;
+using Azure.DigitalTwins.Samples;
 using static Azure.DigitalTwins.Core.Samples.SampleLogger;
 
 namespace Azure.DigitalTwins.Core.Samples
@@ -21,36 +22,40 @@ public async Task RunSamplesAsync(DigitalTwinsClient client)
             // Despite not being a good code practice, this prevents code snippets from being out of context for the user when making API calls that accept Ids as parameters.
 
             PrintHeader("RELATIONSHIP SAMPLE");
+            string sampleBuildingModelId = "dtmi:com:samples:SampleBuilding;1";
+            string sampleFloorModelId = "dtmi:com:samples:SampleFloor;1";
+            await ModelLifecycleSamples.TryDeleteModelAsync(client, sampleBuildingModelId);
+            await ModelLifecycleSamples.TryDeleteModelAsync(client, sampleFloorModelId);
 
             // Create a building digital twin model.
             string buildingModelPayload = SamplesConstants.TemporaryModelWithRelationshipPayload
-                .Replace(SamplesConstants.ModelId, "dtmi:samples:SampleBuilding;1")
+                .Replace(SamplesConstants.RelationshipTargetModelId, sampleFloorModelId)
+                .Replace(SamplesConstants.ModelId, sampleBuildingModelId)
                 .Replace(SamplesConstants.ModelDisplayName, "Building")
-                .Replace(SamplesConstants.RelationshipName, "contains")
-                .Replace(SamplesConstants.RelationshipTargetModelId, "dtmi:samples:SampleFloor;1");
+                .Replace(SamplesConstants.RelationshipName, "contains");
 
             await client.CreateModelsAsync(
                 new[]
                 {
                     buildingModelPayload
                 });
-            Console.WriteLine($"Created model 'dtmi:samples:SampleBuilding;1'.");
+            Console.WriteLine($"Created model '{sampleBuildingModelId}'.");
 
             // Create a floor digital twin model.
             string floorModelPayload = SamplesConstants.TemporaryModelWithRelationshipPayload
-                .Replace(SamplesConstants.ModelId, "dtmi:samples:SampleFloor;1")
+                .Replace(SamplesConstants.RelationshipTargetModelId, sampleBuildingModelId)
+                .Replace(SamplesConstants.ModelId, sampleFloorModelId)
                 .Replace(SamplesConstants.ModelDisplayName, "Floor")
-                .Replace(SamplesConstants.RelationshipName, "containedIn")
-                .Replace(SamplesConstants.RelationshipTargetModelId, "dtmi:samples:SampleBuilding;1");
+                .Replace(SamplesConstants.RelationshipName, "containedIn");
 
             await client.CreateModelsAsync(new[] { floorModelPayload });
-            Console.WriteLine($"Created model 'dtmi:samples:SampleFloor;1.'");
+            Console.WriteLine($"Created model '{sampleFloorModelId}'");
 
             // Create a building digital twin.
             var buildingDigitalTwin = new BasicDigitalTwin
             {
                 Id = "buildingTwinId",
-                Metadata = { ModelId = "dtmi:samples:SampleBuilding;1" }
+                Metadata = { ModelId = sampleBuildingModelId }
             };
 
             string buildingDigitalTwinPayload = JsonSerializer.Serialize(buildingDigitalTwin);
@@ -61,7 +66,7 @@ await client.CreateModelsAsync(
             var floorDigitalTwin = new BasicDigitalTwin
             {
                 Id = "floorTwinId",
-                Metadata = { ModelId = "dtmi:samples:SampleFloor;1" }
+                Metadata = { ModelId = sampleFloorModelId }
             };
 
             string floorDigitalTwinPayload = JsonSerializer.Serialize(floorDigitalTwin);
@@ -197,8 +202,8 @@ await client.CreateModelsAsync(
 
             try
             {
-                await client.DeleteModelAsync("dtmi:samples:SampleBuilding;1");
-                await client.DeleteModelAsync("dtmi:samples:SampleFloor;1");
+                await client.DeleteModelAsync(sampleBuildingModelId);
+                await client.DeleteModelAsync(sampleFloorModelId);
             }
             catch (RequestFailedException ex)
             {
diff --git a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/SamplesConstants.cs b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/SamplesConstants.cs
index 3a9b5e1150d4..f646bed01ffc 100644
--- a/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/SamplesConstants.cs
+++ b/sdk/digitaltwins/Azure.DigitalTwins.Core/samples/DigitalTwinsClientSample/SamplesConstants.cs
@@ -8,27 +8,27 @@ public static class SamplesConstants
         /// <summary>
         /// Room model Id
         /// </summary>
-        public const string RoomModelId = "dtmi:samples:Room;1";
+        public const string RoomModelId = "dtmi:com:samples:Room;1";
 
         /// <summary>
         /// WiFi model Id
         /// </summary>
-        public const string WifiModelId = "dtmi:samples:Wifi;1";
+        public const string WifiModelId = "dtmi:com:samples:Wifi;1";
 
         /// <summary>
         /// Building model Id
         /// </summary>
-        public const string BuildingModelId = "dtmi:samples:Building;1";
+        public const string BuildingModelId = "dtmi:com:samples:Building;1";
 
         /// <summary>
         /// Floor model Id
         /// </summary>
-        public const string FloorModelId = "dtmi:samples:Floor;1";
+        public const string FloorModelId = "dtmi:com:samples:Floor;1";
 
         /// <summary>
         /// HVAC model Id
         /// </summary>
-        public const string HvacModelId = "dtmi:samples:HVAC;1";
+        public const string HvacModelId = "dtmi:com:samples:HVAC;1";
 
         /// <summary>
         /// Placeholder for model Id in the temporary payload.
@@ -43,12 +43,12 @@ public static class SamplesConstants
         /// <summary>
         /// Temporary model Id prefix
         /// </summary>
-        public const string TemporaryModelPrefix = "dtmi:samples:TempModel;";
+        public const string TemporaryModelPrefix = "dtmi:com:samples:TempModel;";
 
         /// <summary>
         /// Temporary component model Id prefix
         /// </summary>
-        public const string TemporaryComponentModelPrefix = "dtmi:samples:ComponentModel;";
+        public const string TemporaryComponentModelPrefix = "dtmi:com:samples:ComponentModel;";
 
         /// <summary>
         /// Placeholder for model display name in the temporary payload.