clarified resourceGroup use

articles/azure-resource-manager/resource-manager-cross-resource-group-deployment.md

@@ -12,7 +12,7 @@ ms.devlang: na
 ms.topic: article
 ms.tgt_pltfrm: na
 ms.workload: na
-ms.date: 05/22/2017
+ms.date: 06/05/2017
 ms.author: tomfitz
 
 ---
@@ -113,6 +113,42 @@ az group deployment create \
 
 After deployment completes, you see two resource groups. Each resource group contains a storage account.
 
+## Use resourceGroup() function
+
+For cross resource group deployments, the [resouceGroup() function](resource-group-template-functions-resource.md#resourcegroup) resolves differently based on how you specify the nested template. 
+
+If you embed one template within another template, resouceGroup() in the nested template resolves to the parent resource group. An embedded template uses the following format:
+
+```json
+"apiVersion": "2017-05-10",
+"name": "embeddedTemplate",
+"type": "Microsoft.Resources/deployments",
+"resourceGroup": "crossResourceGroupDeployment",
+"properties": {
+    "mode": "Incremental",
+    "template": {
+        ...
+        resourceGroup() refers to parent resource group
+    }
+}
+```
+
+If you link to a separate template, resouceGroup() in the linked template resolves to the nested resource group. A linked template uses the following format:
+
+```json
+"apiVersion": "2017-05-10",
+"name": "linkedTemplate",
+"type": "Microsoft.Resources/deployments",
+"resourceGroup": "crossResourceGroupDeployment",
+"properties": {
+    "mode": "Incremental",
+    "templateLink": {
+        ...
+        resourceGroup() in linked template refers to linked resource group
+    }
+}
+```
+
 ## Next steps
 
 * To understand how to define parameters in your template, see [Understand the structure and syntax of Azure Resource Manager templates](resource-group-authoring-templates.md).