diff --git a/specification/ai/Azure.AI.Projects/common/models.tsp b/specification/ai/Azure.AI.Projects/common/models.tsp
index b7a0f35517f4..73911039e517 100644
--- a/specification/ai/Azure.AI.Projects/common/models.tsp
+++ b/specification/ai/Azure.AI.Projects/common/models.tsp
@@ -67,7 +67,7 @@ model PendingUploadRequest {
   @doc("If PendingUploadId is not provided, a random GUID will be used.")
   pendingUploadId?: string;
 
-  @doc("Name of Azure blob storage connection to use for generating temporary SAS token")
+  @doc("Azure Storage Account connection name to use for generating temporary SAS token")
   connectionName?: string;
 
   @doc("BlobReference is the only supported type.")
diff --git a/specification/ai/Azure.AI.Projects/datasets/models.tsp b/specification/ai/Azure.AI.Projects/datasets/models.tsp
index 6b1895fd7be7..2d32aa18657b 100644
--- a/specification/ai/Azure.AI.Projects/datasets/models.tsp
+++ b/specification/ai/Azure.AI.Projects/datasets/models.tsp
@@ -37,10 +37,14 @@ model DatasetVersion {
   @doc("Dataset type")
   type: DatasetType;
 
-  @doc("Indicates if dataset is reference only or managed by dataset service. If true, the underlying data will be deleted when the dataset version is deleted")
+  @doc("Indicates if the dataset holds a reference to the storage, or the dataset manages storage itself. If true, the underlying data will not be deleted when the dataset version is deleted")
   @visibility(Lifecycle.Read)
   isReference?: boolean;
 
+  @doc("The Azure Storage Account connection name. Required if startPendingUploadVersion was not called before creating the Dataset")
+  @visibility(Lifecycle.Read, Lifecycle.Create)
+  connectionName?: string;
+
   ...AssetBase;
 }
 
diff --git a/specification/ai/data-plane/Azure.AI.Projects/preview/2025-05-15-preview/azure-ai-projects.json b/specification/ai/data-plane/Azure.AI.Projects/preview/2025-05-15-preview/azure-ai-projects.json
index 6f22bba580a2..db1103627d27 100644
--- a/specification/ai/data-plane/Azure.AI.Projects/preview/2025-05-15-preview/azure-ai-projects.json
+++ b/specification/ai/data-plane/Azure.AI.Projects/preview/2025-05-15-preview/azure-ai-projects.json
@@ -2211,9 +2211,17 @@
         },
         "isReference": {
           "type": "boolean",
-          "description": "Indicates if dataset is reference only or managed by dataset service. If true, the underlying data will be deleted when the dataset version is deleted",
+          "description": "Indicates if the dataset holds a reference to the storage, or the dataset manages storage itself. If true, the underlying data will not be deleted when the dataset version is deleted",
           "readOnly": true
         },
+        "connectionName": {
+          "type": "string",
+          "description": "The Azure Storage Account connection name. Required if startPendingUploadVersion was not called before creating the Dataset",
+          "x-ms-mutability": [
+            "read",
+            "create"
+          ]
+        },
         "id": {
           "type": "string",
           "description": "Asset ID, a unique identifier for the asset",
@@ -2937,7 +2945,7 @@
         },
         "connectionName": {
           "type": "string",
-          "description": "Name of Azure blob storage connection to use for generating temporary SAS token"
+          "description": "Azure Storage Account connection name to use for generating temporary SAS token"
         },
         "pendingUploadType": {
           "type": "string",
diff --git a/specification/ai/data-plane/Azure.AI.Projects/stable/2025-05-01/azure-ai-projects.json b/specification/ai/data-plane/Azure.AI.Projects/stable/2025-05-01/azure-ai-projects.json
index 4f40ddab8e44..57eccaa32a4d 100644
--- a/specification/ai/data-plane/Azure.AI.Projects/stable/2025-05-01/azure-ai-projects.json
+++ b/specification/ai/data-plane/Azure.AI.Projects/stable/2025-05-01/azure-ai-projects.json
@@ -1528,9 +1528,17 @@
         },
         "isReference": {
           "type": "boolean",
-          "description": "Indicates if dataset is reference only or managed by dataset service. If true, the underlying data will be deleted when the dataset version is deleted",
+          "description": "Indicates if the dataset holds a reference to the storage, or the dataset manages storage itself. If true, the underlying data will not be deleted when the dataset version is deleted",
           "readOnly": true
         },
+        "connectionName": {
+          "type": "string",
+          "description": "The Azure Storage Account connection name. Required if startPendingUploadVersion was not called before creating the Dataset",
+          "x-ms-mutability": [
+            "read",
+            "create"
+          ]
+        },
         "id": {
           "type": "string",
           "description": "Asset ID, a unique identifier for the asset",
@@ -2097,7 +2105,7 @@
         },
         "connectionName": {
           "type": "string",
-          "description": "Name of Azure blob storage connection to use for generating temporary SAS token"
+          "description": "Azure Storage Account connection name to use for generating temporary SAS token"
         },
         "pendingUploadType": {
           "type": "string",
diff --git a/specification/ai/data-plane/Azure.AI.Projects/stable/v1/azure-ai-projects.json b/specification/ai/data-plane/Azure.AI.Projects/stable/v1/azure-ai-projects.json
index 7bbe4c05a96c..25fc189ad970 100644
--- a/specification/ai/data-plane/Azure.AI.Projects/stable/v1/azure-ai-projects.json
+++ b/specification/ai/data-plane/Azure.AI.Projects/stable/v1/azure-ai-projects.json
@@ -1528,9 +1528,17 @@
         },
         "isReference": {
           "type": "boolean",
-          "description": "Indicates if dataset is reference only or managed by dataset service. If true, the underlying data will be deleted when the dataset version is deleted",
+          "description": "Indicates if the dataset holds a reference to the storage, or the dataset manages storage itself. If true, the underlying data will not be deleted when the dataset version is deleted",
           "readOnly": true
         },
+        "connectionName": {
+          "type": "string",
+          "description": "The Azure Storage Account connection name. Required if startPendingUploadVersion was not called before creating the Dataset",
+          "x-ms-mutability": [
+            "read",
+            "create"
+          ]
+        },
         "id": {
           "type": "string",
           "description": "Asset ID, a unique identifier for the asset",
@@ -2097,7 +2105,7 @@
         },
         "connectionName": {
           "type": "string",
-          "description": "Name of Azure blob storage connection to use for generating temporary SAS token"
+          "description": "Azure Storage Account connection name to use for generating temporary SAS token"
         },
         "pendingUploadType": {
           "type": "string",